Founder Effects
Founder Effects
A founder effect occurs when a new population is established by a relatively small number of individuals drawn from a larger population. Because the founders carry only part of the genetic variation present in the source population, the new population may begin with different allele frequencies and reduced genetic diversity. Rare variants can become unusually common, while variants that were common in the source population may become scarce or disappear entirely.
Founder effects are a special consequence of genetic drift and are especially important when populations remain small or isolated after founding. Their genetic consequences can persist for many generations, particularly when population growth is rapid, migration is limited, or mating occurs largely within the population.
Founder effects have been studied in human populations, island species, invasive organisms, endangered wildlife, plants, pathogens, and laboratory populations. They help explain patterns of genetic diversity, the geographic concentration of some inherited diseases, and the distinctive genetic structure of populations descended from relatively few ancestors.
Population-Genetics Foundations
The genetic consequences of a founding event depend on more than the number of founders. They are also influenced by which individuals happen to establish the population, how much genetic diversity those individuals carry, their reproductive success, subsequent population growth, migration, natural selection, and additional episodes of population reduction.
Some founders may leave far more descendants than others. As a result, the effective genetic contribution of a founding population may be considerably smaller than the number of people or organisms originally involved.
Founder events can alter allele frequencies simply through chance. This process is strongest when founding populations are small. Genetic drift after settlement may further amplify those initial differences.
Repeated founder events can have cumulative effects. During geographic range expansion, individuals at the leading edge of an expanding population may establish another population farther away. If this process occurs repeatedly, genetic diversity can progressively decline with distance from the original population.
Founder effects have also been proposed as a possible mechanism contributing to evolutionary divergence and speciation. Experimental and theoretical research, however, shows that founder events alone do not necessarily produce reproductive isolation. Selection, ecology, recombination, population size, and subsequent gene flow can all influence the evolutionary outcome.
Human Expansion and Migration
Human genetic diversity provides one of the best-known examples of serial founder-effect models. Studies of worldwide genetic variation have found patterns consistent with repeated population founding during the geographic expansion of modern humans outward from Africa.
Under this model, relatively small groups repeatedly moved into new territories. Each new population carried only a portion of the genetic diversity present in the population from which it originated. Over many successive migrations, this process contributed to broad geographic patterns in heterozygosity, allele frequencies, linkage disequilibrium, and other measures of genetic variation.
These patterns do not imply that human populations are divided into sharply separated biological races. Human populations have repeatedly exchanged genes through migration and intermarriage. Admixture, regional migration, population growth, isolation, and local demographic events have modified the simple serial-founder pattern.
Founder effects are therefore one component of a much more complex history of human population movement.
Founder-related processes have also been studied in the settlement of the Americas, the Caribbean, Iceland, the Faroe Islands, Norfolk Island, Tristan da Cunha, and numerous other geographically or historically isolated populations.
Founder Populations and Genetic Isolates
Populations descended from relatively small groups of founders can develop distinctive genetic characteristics, particularly when geographic, religious, cultural, or social factors limit subsequent gene flow.
Frequently studied founder populations include Finnish regional populations, French Canadians, Hutterites, Amish communities, Icelanders, Ashkenazi Jewish populations, Sardinians, Roma populations, and several island communities.
Finland provides a prominent example. Historical settlement patterns, population isolation, genetic drift, and regional founder events contributed to the concentration of a number of rare inherited disorders sometimes collectively described as the Finnish disease heritage.
Quebec provides another important example. Genetic and genealogical research shows that French Canadian populations are not genetically uniform. Different regions experienced different settlement histories, migration patterns, founder contributions, and population growth. These processes created regional differences in the frequencies of rare genetic variants.
Founder effects can also interact with later admixture. Studies of Roma populations, for example, illustrate how an early population reduction can decrease diversity while later gene flow introduces additional genetic variation.
These examples demonstrate that a founder population should not be understood as genetically static. Population structure continues to change through migration, reproduction, selection, mutation, and demographic events.
Founder Mutations and Human Disease
One of the most important medical consequences of founder effects is the concentration of particular disease-associated variants.
A mutation that is rare in a large population can become relatively common if one or more founders carry it and their descendants increase rapidly in number. Continued isolation or endogamy may allow the variant to remain at an elevated frequency.
Founder mutations have been identified in genes associated with hereditary breast and ovarian cancer, familial hypercholesterolemia, hearing loss, neurological disorders, metabolic diseases, retinal disorders, cardiomyopathies, kidney disease, inherited cancer syndromes, and numerous rare genetic conditions.
Well-studied examples occur among Ashkenazi Jewish, Finnish, French Canadian, Icelandic, Sardinian, Hutterite, Afrikaner, South African, Middle Eastern, Indigenous American, and other populations.
Researchers often identify founder mutations by examining the DNA surrounding a disease-associated variant. When unrelated individuals carrying the same mutation also share a surrounding genetic haplotype, the pattern can indicate inheritance from a common ancestor rather than repeated independent mutations.
Founder populations can therefore be especially useful for discovering disease genes. Variants that are extremely rare elsewhere may occur frequently enough within a founder population to permit genetic mapping and clinical study.
This information can also improve population-specific genetic screening. At the same time, relying only on known founder mutations can miss other disease-causing variants. Modern sequencing increasingly shows that genetically isolated populations may contain more variation than earlier founder-based screening strategies recognized.
Cancer and Population-Specific Founder Variants
Cancer genetics provides numerous examples of founder mutations.
Recurrent BRCA1 and BRCA2 mutations have been identified in populations including Ashkenazi Jews, French Canadians, Poles, Swedes, Italians, Sardinians, Mexicans, Bahamians, Norwegians, and others.
Founder mutations have also been described in genes associated with Lynch syndrome and other inherited cancer predisposition syndromes.
These discoveries can make targeted genetic testing more efficient within certain populations, but founder-based testing has limitations. A population may contain several founder mutations as well as unrelated pathogenic variants. Comprehensive sequencing may therefore identify clinically significant mutations that would be missed by testing only for historically common founder variants.
Founder effects are thus useful for understanding population-specific cancer risk but should not be treated as the sole explanation for inherited cancer within a population.
Islands, Animals, Plants, and Conservation Genetics
Island populations provide natural settings for studying founder effects because islands are often colonized by small numbers of individuals.
Research involving birds, sheep, macaques, deer, koalas, fish, plants, and other organisms demonstrates that founding events can reduce genetic diversity and change allele frequencies. Sequential colonization of multiple islands can produce repeated genetic losses and increasing differentiation among populations.
The severity of a founder effect varies considerably. Some newly established populations lose substantial genetic diversity, while others retain much of the variation found in the source population.
Multiple introductions can greatly reduce the genetic consequences of a founder event. If individuals arrive from several source populations, they may introduce new alleles and restore genetic variation.
These principles are especially important in conservation biology.
Reintroduction and translocation programs sometimes create intentionally founded populations of endangered species. Conservation managers must therefore consider how many founders are used, how genetically representative they are, whether males and females contribute equally to later generations, and whether genetic diversity can be maintained as the population grows.
A population can become numerically abundant while remaining genetically impoverished. Population size alone therefore does not necessarily indicate genetic health.
Invasive Species and Range Expansion
Founder effects are also common during biological invasions.
When a small number of organisms establish themselves in a new region, genetic diversity may initially be much lower than in the native population. This pattern has been documented in invasive birds, insects, fish, plants, and other organisms.
Despite low diversity, some invasive populations expand rapidly. Several mechanisms can help explain this apparent paradox.
An introduction may involve more founders than initially assumed. Multiple introductions may bring genetic material from different source populations. Sufficient adaptive variation may survive even a severe bottleneck. Natural selection may then act on this remaining variation as the population encounters new environments.
Repeated founding at the edge of an expanding range can also create serial founder effects. Such processes can reduce diversity toward the range margin and sometimes affect the speed or success of continued expansion.
Founder effects can differ between interacting species as well. Hosts and parasites introduced together may experience very different degrees of genetic reduction because their population sizes, reproductive strategies, and transmission histories differ.
Pathogens and Founder Events
The concept of a founder effect can also be applied to pathogens.
When an epidemic in a new region begins with a small number of infected individuals or viral lineages, the early pathogen population may contain only a fraction of the genetic diversity found elsewhere.
Genetic studies of pathogens can sometimes reveal evidence of rapid expansion from a limited number of founders. Such approaches have been applied to historical HIV populations and to research examining the early spread of SARS-CoV-2.
Pathogen founder effects can help researchers reconstruct transmission history, but subsequent mutation, population growth, migration, and repeated introductions can quickly complicate the original signal.
Founder Effects, Adaptation, and Speciation
Founder effects have long been discussed as possible triggers of evolutionary change.
A small founding population may experience abrupt changes in allele frequencies, altered genetic interactions, increased inbreeding, and new selective pressures. These changes could theoretically move a population onto a different evolutionary trajectory.
Research has produced mixed results regarding strong versions of founder-effect speciation theories. Experimental populations subjected to severe bottlenecks do not automatically develop reproductive isolation.
Other experiments show that differences created by founders can persist even while natural selection drives adaptation in predictable directions.
Founder effects and adaptation should therefore be viewed as interacting processes rather than competing explanations. Chance determines which genetic variants founders initially carry, while natural selection influences which variants become advantageous or disadvantageous in the new environment.
Limits of Founder-Effect Explanations
Not every unusual genetic pattern is evidence of a founder effect.
High frequencies of a disease-associated allele can potentially result from founder history, genetic drift, natural selection, population bottlenecks, recurrent mutation, population structure, or combinations of these processes.
Likewise, a population described as a genetic isolate may have experienced substantial migration and admixture over time.
Modern genomic studies increasingly combine DNA sequencing with genealogical records, ancient DNA, demographic modeling, haplotype analysis, and historical evidence to distinguish among these explanations.
Founder effects are therefore most useful when treated as one element within a broader demographic and evolutionary history.
Conclusion
Founder effects demonstrate how historical events can leave lasting biological consequences.
When a small number of individuals establish a population, chance determines which portion of the original population's genetic diversity is carried into the new community. Genetic drift, population growth, migration, selection, and reproductive patterns then shape what happens to that variation over subsequent generations.
In humans, founder effects help explain aspects of global migration, regional genetic structure, and the concentration of certain inherited disorders. In animals and plants, they influence island colonization, invasive species, endangered populations, and conservation programs. In pathogens, they can provide clues about the beginnings of epidemics and geographic spread.
The central lesson is that population history matters. Present-day genetic patterns cannot be understood only by examining current population size or geography. They also reflect migration, isolation, chance, reproduction, selection, and the particular individuals who contributed genes during earlier generations.
Founder effects are therefore a fundamental concept connecting population genetics, evolution, medicine, human history, ecology, and conservation biology.
Foundations, Population Genetics, Genomics, and Methods
1. Founder Effect — Genetics Glossary | National Human Genome Research Institute | NHGRI | 2026
Provides a concise explanation of the founder effect as the reduction in genomic diversity occurring when a small number of individuals establish a population separate from a larger source population. It also connects founder effects with inherited disease and speciation.
2. Revisiting Founder Populations in an Age of Global Biobanks | Christa Caggiano, Ruhollah Shemirani and Eimear E. Kenny | Annual Review of Genomics and Human Genetics | 2026
Reviews how large genomic biobanks are changing understanding of founder populations. Population-scale sequencing shows that founder events and founder-like genetic structures are considerably more widespread than traditionally recognized.
3. High-Throughput Evidence Generation to Support Tentative Gene-Disease Relationship From a Cohort Enriched for Autozygosity and Founder Effect | Khadijah Bakur et al. | Genetics in Medicine | 2026
Uses a large cohort enriched for consanguinity and founder effects to identify homozygous loss-of-function and founder variants. The study demonstrates how founder populations can accelerate identification of gene-disease relationships.
4. Founder Variants and Population Genomes—Toward Precision Medicine | Abhinav Jain, Disha Sharma, Anjali Bajaj, Vishu Gupta and Vinod Scaria | Advances in Genetics | 2021
Reviews how migration, population isolation, demographic change and community practices create founder variants. The authors discuss identifying founder variants through population genomics and their potential value for genetic screening, diagnosis and precision medicine.
5. With Expanded Carrier Screening, Founder Populations Run the Risk of Being Overlooked | Authors | Journal of Community Genetics | 2017
Argues that broad genetic screening panels can miss locally important founder mutations and examines several genetically isolated Dutch populations as examples.
6. The Effective Founder Effect in a Spatially Expanding Population | Authors | Evolution | 2015
Develops a mathematical method for estimating the cumulative strength of founder events during range expansion. Application to Arabidopsis suggests stronger founder effects during its expansion in the Americas than in Europe.
7. Allelic Richness Following Population Founding Events—A Stochastic Modeling Framework Incorporating Gene Flow and Genetic Drift | Authors | PLOS ONE | 2015
Models the loss of alleles following population founding and examines how subsequent gene flow and genetic drift affect recovery or further erosion of genetic diversity.
8. Using Population Isolates in Genetic Association Studies | Authors | Briefings in Functional Genomics | 2014
Reviews why founder populations and genetic isolates can be especially useful for identifying rare disease-associated variants and mapping complex traits.
9. Using Genetically Isolated Populations to Understand the Genomic Basis of Disease | Authors | Genome Medicine | 2014
Explains how founder populations can enrich otherwise rare variants and extend linkage disequilibrium, making them powerful resources for discovering genes underlying human disease.
10. Founder Effect | T. Kivisild | Brenner's Encyclopedia of Genetics | 2013
Reviews the basic population-genetic mechanism of founder effects, including loss of genetic variation, altered allele frequencies, genetic drift, and the enrichment or disappearance of particular disease-associated variants.
11. Genetic Colonization | J. B. Mitton | Brenner's Encyclopedia of Genetics | 2013
Explains why a small colonizing population may contain only a nonrandom subset of the source population's genetic diversity. The chapter discusses both loss of variation and accidental enrichment of rare alleles.
12. The Role of Founder Effects on the Evolution of Reproductive Isolation | Daniel R. Matute | Journal of Evolutionary Biology | 2013
Examines whether strong allele-frequency changes following colonization by small populations accelerate reproductive isolation. The study contributes to the debate over whether founder effects can trigger speciation.
13. From Nature to the Laboratory: The Impact of Founder Effects on Adaptation | Mauro Santos et al. | Journal of Evolutionary Biology | 2012
Demonstrates experimentally that differences in founding genetic diversity and effective population size can influence the rate and trajectory of adaptation after populations enter a novel environment.
14. The Reality and Importance of Founder Speciation in Evolution | Alan R. Templeton | BioEssays | 2008
Reassesses founder speciation and argues that founder events can sometimes interact with selection, recombination and ecological opportunity to promote evolutionary innovation even if successful founder speciation is uncommon.
15. Founder Mutations Among the Dutch | Maurice P. A. Zeegers et al. | European Journal of Human Genetics | 2004
Reviews founder mutations identified in the Netherlands and connects their geographic distributions to regional isolation, religious endogamy, migration and rapid population growth.
16. Positional Cloning of Disease Genes: Advantages of Genetic Isolates | Leena Peltonen | Human Heredity | 1999
Explains why populations descended from relatively few founders can be unusually effective for linkage analysis and positional cloning of disease-causing genes.
17. Linkage Disequilibrium Mapping in Isolated Populations: The Example of Finland Revisited | Authors | Human Molecular Genetics | 1998
Reviews how Finnish founder mutations and extended linkage disequilibrium have enabled high-resolution mapping of genes responsible for several inherited disorders.
18. Founder Effects and Peak Shifts Without Genetic Drift | Michael C. Whitlock | Evolution | 1997
Uses evolutionary models to examine movement across adaptive landscapes and shows that changing environmental conditions can sometimes produce adaptive peak shifts without requiring unusually strong genetic drift.
19. Founder-Effect Speciation Theory: Failure of Experimental Corroboration | A. Moya, A. Galiana and F. J. Ayala | Proceedings of the National Academy of Sciences | 1995
Reports a long-running Drosophila experiment testing founder-effect speciation. Repeated founding events and population crashes failed to produce the predicted reproductive divergence, challenging strong versions of founder-speciation theory.
20. Speciation: Down the Bottleneck? | Brian Charlesworth | Current Biology | 1995
Discusses experimental tests of founder-effect models of speciation and argues that repeated population bottlenecks in fruit flies had not provided convincing support for the hypothesis.
21. High Frequencies of Human Genetic Diseases: Founder Effect With Genetic Drift or Selection? | Joël Zlotogora | American Journal of Medical Genetics | 1994
Examines competing explanations for unusually high frequencies of hereditary disorders in isolated populations, particularly founder effects, genetic drift and possible selective advantages.
22. The Founder Effect Theory: Quantitative Variation and mdg-1 Mobile Element Polymorphism in Experimental Populations of Drosophila melanogaster | C. Terzian and C. Biémont | Genetica | 1988
Tests aspects of founder-effect theory experimentally using Drosophila populations founded by single brother-sister pairs, examining subsequent genetic and quantitative variation.
23. The Theory of Speciation via the Founder Principle | Alan R. Templeton | Genetics | 1980
Develops the genetic-transilience model of founder-effect speciation. The paper examines how drift, inbreeding, linkage disequilibrium and selection might interact following a founding event to produce rapid evolutionary change.
24. Probability of Founder Effect in a Tribal Population | E. A. Thompson and J. V. Neel | Proceedings of the National Academy of Sciences | 1978
Develops a quantitative framework for determining how probable an apparent founder effect is when an unusually common allele occurs in a finite population, using Indigenous American populations as examples.
Human Expansion and Migration
25. Founder Mutations and Rare Disease in the Arab World | Authors | Human Genomics | 2024
Reviews how population isolation, endogamy, demographic history and consanguinity can increase the frequencies of particular founder variants and rare inherited diseases in Arab populations.
26. Common and Founder Mutations for Monogenic Traits in Sub-Saharan African Populations | Michèle Ramsay et al. | Annual Review of Genomics and Human Genetics | 2018
Reviews founder mutations associated with inherited disorders in African populations, including forms of albinism, Fanconi anemia, cystic fibrosis and Gaucher disease.
27. Beyond Serial Founder Effects: The Impact of Admixture and Localized Gene Flow on Patterns of Regional Genetic Diversity | Authors | Journal of Human Evolution | 2017
Finds strong support for an overall out-of-Africa serial-founder pattern while showing that admixture, local gene flow and later migrations substantially modify genetic diversity at regional scales.
28. Distance From Sub-Saharan Africa Predicts Mutational Load in Diverse Human Genomes | Brenna M. Henn et al. | Proceedings of the National Academy of Sciences | 2016
Tests whether serial founder events accompanying human expansion affected potentially deleterious variation. Results show demographic expansion strongly influenced the frequency distribution of many variants.
29. Can a Linguistic Serial Founder Effect Originating in Africa Explain the Worldwide Phonemic Cline? | Authors | PLOS ONE | 2016
Uses simulations to test whether a serial-founder process could generate worldwide patterns in phonemic diversity and identifies assumptions necessary for such a linguistic model to work.
30. The Great Human Expansion | Brenna M. Henn, L. Luca Cavalli-Sforza and Marcus W. Feldman | Proceedings of the National Academy of Sciences | 2012
Reviews evidence that the dispersal of modern humans across the world involved repeated founder events that progressively reduced genetic diversity outside Africa.
31. Phonemic Diversity Supports a Serial Founder Effect Model of Language Expansion From Africa | Quentin D. Atkinson | Science | 2011
Proposes that global phoneme diversity declines with distance from Africa in a pattern analogous to genetic serial founder effects, extending the founder-effect concept into hypotheses about cultural evolution.
32. Explaining Worldwide Patterns of Human Genetic Variation Using a Coalescent-Based Serial Founder Model of Migration Outward From Africa | Michael DeGiorgio, Mattias Jakobsson and Noah A. Rosenberg | Proceedings of the National Academy of Sciences | 2009
Shows that successive founder events during human expansion from Africa can reproduce worldwide patterns of declining heterozygosity, increasing linkage disequilibrium and changing allele-frequency distributions.
33. A Serial Founder Effect Model for Human Settlement Out of Africa | Omkar Deshpande, Serafim Batzoglou, Marcus W. Feldman and L. Luca Cavalli-Sforza | Proceedings of the Royal Society B | 2009
Models global human settlement as a sequence of population-founding events while allowing continuing gene flow among neighboring populations. The results support prolonged expansion outward from Africa.
34. An Ancient DNA Test of a Founder Effect in Native American ABO Blood Group Frequencies | Melissa S. Halverson and Deborah A. Bolnick | American Journal of Physical Anthropology | 2008
Uses ancient DNA to investigate whether unusual ABO blood-group frequencies among Native American populations can be explained by founder effects associated with the initial settlement of the Americas.
35. Support From the Relationship of Genetic and Geographic Distance in Human Populations for a Serial Founder Effect Originating in Africa | Sohini Ramachandran et al. | Proceedings of the National Academy of Sciences | 2005
Demonstrates that human genetic diversity decreases with geographic distance from Africa in a pattern consistent with successive founder events during worldwide human expansion.
36. Shipwrecks and Founder Effects: Divergent Demographic Histories Reflected in Caribbean mtDNA | Antonio Salas et al. | American Journal of Physical Anthropology | 2005
Compares mitochondrial diversity in Colombian Chocó and Garífuna populations. Reduced diversity and several high-frequency lineages among Garífuna provide evidence of a substantial founder effect.
37. Beyond Race: Towards a Whole-Genome Perspective on Human Populations and Genetic Variation | Lynn B. Jorde and Stephen P. Wooding | Nature Reviews Genetics | 2004
Reviews human genomic diversity and emphasizes how migration, founder effects, bottlenecks, drift and gene flow produce gradual and overlapping patterns of variation rather than discrete biological races.
38. Genetic Variation of the Mitochondrial DNA Genome in American Indians Is at Mutation-Drift Equilibrium | Authors | American Journal of Physical Anthropology | 1991
Examines mitochondrial diversity among Pima, Maya and Ticuna populations and asks whether the genetic signal of the original founding of the Americas persisted or was later obscured by mutation and drift.
39. Studies on an Isolated West Indies Population: Genetic Differentiation, Evidence for Founder Effect and Drift | J. L. Serre et al. | Gene Geography | 1987
Studies genetic markers in the historically isolated population of St. Barthélemy and documents differentiation consistent with founder effects followed by genetic drift.
Founder Populations and Genetic Isolates
40. Actionable Genetic Variants in 4,198 Scottish Participants From the Orkney and Shetland Founder Populations | Authors | American Journal of Human Genetics | 2025
Identifies medically actionable variants that have risen dramatically in frequency in particular Orkney and Shetland communities because of local founder effects and genetic drift.
41. Genetic Evidence Points to Distinct Paternal Settlers of the Faroe Islands and Iceland | Authors | Frontiers in Genetics | 2024
Uses Y-chromosome variation to compare the founder histories of Iceland and the Faroe Islands and finds reduced paternal diversity consistent with small founding populations.
42. The Counteracting Effects of Demography on Functional Genomic Variation: The Roma Paradigm | Authors | Molecular Biology and Evolution | 2021
Shows that founder events reduced genetic diversity among Roma populations while subsequent admixture introduced new variation, demonstrating how bottlenecks and gene flow can exert opposing genomic effects.
43. Recent Common Origin, Reduced Population Size, and Marked Admixture Have Shaped European Roma Genomes | Authors | Molecular Biology and Evolution | 2020
Whole-genome analysis identifies an early founder event, substantial population reduction, later endogamy and extensive admixture during Roma population history.
44. Founder Variations in Isolated Populations | Gabriela Chavarriá-Soley et al. | Genome Plasticity in Health and Disease | 2020
Reviews how shared haplotypes surrounding pathogenic variants can reveal common ancestry and help estimate the age and history of founder mutations in genetic isolates.
45. Ancient Genomes From Iceland Reveal the Making of a Human Population | S. Sunna Ebenesersdóttir et al. | Science | 2018
Sequencing ancient Icelanders shows how Norse and Gaelic founders contributed to the island population and how more than a millennium of genetic drift altered modern Icelandic ancestry.
46. Finnish Disease Heritage | Marjo Kestilä, Elina Ikonen and Anna-Elina Lehesjoki | Duodecim | 2010
Reviews dozens of inherited disorders disproportionately represented in Finland, many of which are dominated by a single founder mutation.
47. Genetic Markers and Population History: Finland Revisited | Authors | European Journal of Human Genetics | 2010
Reexamines Finland's population history and suggests that some geographic patterns attributed to recent founder effects may instead reflect longer-term genetic drift and regional population structure.
48. Legacy of Mutiny on the Bounty: Founder Effect and Admixture on Norfolk Island | Stuart Macgregor et al. | European Journal of Human Genetics | 2010
Uses a pedigree extending over two centuries to investigate the genetic consequences of descent from a small number of European male and Polynesian female founders on Norfolk Island.
49. Clinical Genetics and the Hutterite Population: A Review of Mendelian Disorders | Kym M. Boycott et al. | American Journal of Medical Genetics Part A | 2008
Reviews hereditary disorders in the Hutterite population, whose descent from a relatively small founding population created characteristic founder effects useful for medical-genetic research.
50. Personality Traits in Sardinia: Testing Founder Population Effects on Trait Means and Variances | Paul T. Costa Jr. et al. | Behavior Genetics | 2007
Uses a large sample from an isolated Sardinian region to test whether founder-population history is associated with differences in personality-trait distributions.
51. Multiple Mutations Responsible for Frequent Genetic Diseases in Isolated Populations | Joël Zlotogora | European Journal of Human Genetics | 2007
Warns that an unusually common recessive disease in an isolated population does not automatically prove a single founder mutation because multiple mutations and selection can sometimes produce similar patterns.
52. The Distribution of HLA Alleles Revealed a Founder Effect in the Geographically Isolated Chinese Population, Drung | Shangwu Chen et al. | Molecular Immunology | 2007
Finds unusually low HLA allelic diversity and high frequencies of several alleles among the geographically isolated Drung population, consistent with descent from relatively few founders.
53. Exploring the Genetics of Longevity in the Old Order Amish | Authors | Mechanisms of Ageing and Development | 2005
Describes the Old Order Amish as a useful founder population for studying complex traits because of their limited number of founders, large pedigrees and comparatively homogeneous lifestyle.
54. A Population-Genetic Test of Founder Effects and Implications for Ashkenazi Jewish Diseases | Authors | American Journal of Human Genetics | 2004
Tests whether high frequencies of several Ashkenazi Jewish disease alleles can be explained by founder effects and demographic bottlenecks rather than requiring selective advantage.
55. Genealogy and Genes: Tracing the Founding Fathers of Tristan da Cunha | Authors | European Journal of Human Genetics | 2003
Compares Y-chromosome variation with genealogical records in Tristan da Cunha, whose modern population descends from a very small number of original male and female founders.
56. Database for the Mutations of the Finnish Disease Heritage | Authors | Human Mutation | 2002
Describes a database cataloging founder and private mutations responsible for diseases enriched in Finland through founder effects and population isolation.
57. Genetic Factors and the Founder Effect Explain Familial Multiple Sclerosis in Sardinia | M. G. Marrosu et al. | Neurology | 2002
Finds strong familial aggregation of multiple sclerosis in Sardinia and identifies ancestral relationships suggesting that founder effects contributed to local enrichment of susceptibility variants.
58. Fragmentation of the Québec Population Genetic Pool: Evidence From the Genetic Contribution of Founders per Region | Alain Gagnon and Evelyne Heyer | American Journal of Physical Anthropology | 2001
Uses historical demographic records to show that the genetic contributions of early French settlers varied markedly among regions of Quebec, producing geographically structured founder effects.
59. Hepatic Carnitine Palmitoyl Transferase 1 Deficiency in North American Hutterites: Evidence for a Founder Effect | Authors | Molecular Genetics and Metabolism | 2001
Traces a CPT1A mutation found in Canadian and American Hutterites to shared ancestors and discusses DNA-based newborn screening in a founder population.
60. mtDNA and the Origin of the Icelanders: Deciphering Signals of Recent Population History | Authors | American Journal of Human Genetics | 2000
Finds that Icelandic mitochondrial lineages reflect Scandinavian and British-Irish ancestry but that founder effects and subsequent genetic drift substantially altered lineage frequencies.
61. Molecular Genetics of the Finnish Disease Heritage | Leena Peltonen, Anu Jalanko and Tuula Varilo | Human Molecular Genetics | 1999
Reviews the distinctive group of inherited disorders enriched in Finland through founder effects, genetic drift and regional isolation and explains how this history aided disease-gene mapping.
62. Molecular Background of the Finnish Disease Heritage | Leena Peltonen | Annals of Medicine | 1997
Describes how successive settlement by relatively small populations produced regional genetic isolates within Finland and increased frequencies of particular recessive disorders.
63. Messages From an Isolate: Lessons From the Finnish Gene Pool | Authors | Biological Chemistry Hoppe-Seyler | 1995
Reviews Finland as a genetic isolate and describes how founder effects, drift and regional isolation have concentrated particular disease-causing variants.
64. Variability of the Genetic Contribution of Quebec Population Founders Associated to Some Deleterious Genes | Evelyne Heyer and Marc Tremblay | American Journal of Human Genetics | 1995
Uses genealogical information to investigate why several rare inherited diseases reached unusually high frequencies in Quebec's Saguenay region.
65. Founder Effect: Assessment of Variation in Genetic Contributions Among Founders | E. O'Brien et al. | Human Biology | 1994
Compares genealogical founder contributions in Hutterites, Sottunga islanders and Utah Mormons, illustrating how pedigree structure determines whether particular founders become disproportionately represented.
66. Founder Effect and Genetic Disease in Sottunga, Finland | Authors | American Journal of Physical Anthropology | 1988
Uses extensive genealogical information to estimate the contributions of historical founders to the contemporary gene pool of the isolated Swedish-speaking population of Sottunga.
67. Cystic Fibrosis in the Ohio Amish: Gene Frequency and Founder Effect | K. W. Klinger | Human Genetics | 1983
Documents an unusually high incidence of cystic fibrosis in one Ohio Amish isolate while another Amish population showed none, illustrating how different founders can produce sharply different disease frequencies.
Quebec and Regional Founder Populations
68. Fine-Scale Structure of a Whole Regional Population Through Genetics and Genealogies | Authors | Nature Communications | 2026
Reconstructs fine-scale population structure in Saguenay–Lac-Saint-Jean and shows how serial settlement, rapid population growth and founder effects produced measurable regional genetic differentiation.
69. Rare Variants and Founder Effect in the Beauce Region of Quebec | Mylène Gagnon et al. | Communications Biology | 2025
Uses genealogies and genomic data to identify a distinctive regional founder effect in Beauce and dozens of pathogenic variants occurring at elevated carrier frequencies.
70. Deciphering the Genetic Structure of the Quebec Founder Population Using Genealogies | Authors | European Journal of Human Genetics | 2023
Combines genealogical relationships with genomic data to trace how settlement patterns produced distinctive founder effects in Saguenay, Gaspé and other Quebec regions.
71. A Founder Mutation in the PLPBP Gene in Families From Saguenay-Lac-St-Jean Affected by Pyridoxine-Dependent Epilepsy | Maitou Pal et al. | JIMD Reports | 2021
Identifies a shared PLPBP mutation and haplotype in French Canadian families, with evidence suggesting introduction into Quebec by a common female ancestor.
72. The GBA p.Trp378Gly Mutation Is a Probable French-Canadian Founder Mutation Causing Gaucher Disease and Synucleinopathies | J. A. Ruskey et al. | Clinical Genetics | 2018
Uses haplotype and identity-by-descent analyses to demonstrate a shared origin for a GBA mutation associated with Gaucher disease and Parkinson-related disorders.
73. Contribution of the PALB2 c.2323C>T Founder Mutation in French Canadian Breast and Ovarian Cancer Families | Authors | Breast Cancer Research and Treatment | 2013
Evaluates a recurrent PALB2 mutation in French Canadian cancer families and supports its inclusion among population-specific hereditary cancer founder variants.
74. A Founder Mutation in the PEX6 Gene Is Responsible for Increased Incidence of Zellweger Syndrome in a French Canadian Population | Sebastien Levesque et al. | BMC Medical Genetics | 2012
Identifies a recurrent PEX6 mutation responsible for an unusually high incidence of Zellweger syndrome in Saguenay–Lac-Saint-Jean.
75. An USH2A Founder Mutation Is the Major Cause of Usher Syndrome Type 2 in Canadians of French Origin | Authors | European Journal of Human Genetics | 2009
Finds that a recurrent USH2A mutation accounts for a large fraction of disease alleles among French Canadians and links Quebecois and Acadian founder histories.
76. Founder Effects and Genetic Variability in Quebec | Claudia Moreau, Hélène Vézina and Damian Labuda | Médecine/Sciences | 2007
Shows that Quebec contains multiple regional founder effects rather than one uniform genetic isolate, particularly in the distribution of rare genetic variants.
77. Human Genetics: Lessons From Quebec Populations | Authors | Annual Review of Genomics and Human Genetics | 2001
Reviews numerous hereditary diseases enriched in Quebec subpopulations and explains how founder effects, drift and detailed genealogical records have aided disease-gene discovery.
Founder Mutations and Medical Genetics
78. The p.Gly111Arg ABCC8 Variant: A Founder Mutation Causing Congenital Hyperinsulinism in the Indian Agarwal Community | Vandana Jain et al. | Clinical Genetics | 2025
Identifies an ABCC8 founder variant associated with congenital hyperinsulinism in India's Agarwal community and illustrates the continuing medical relevance of population-specific founder mutations.
79. Founder Effects of the Homogentisate 1,2-Dioxygenase Gene in a Gypsy Population and Mutation Spectrum Among Alkaptonuria Patients From India | Authors | Clinical Rheumatology | 2020
Reports an exceptionally high prevalence of alkaptonuria in an Indian community linked to a founder mutation in HGD while documenting greater mutation diversity elsewhere in India.
80. Report of a Second Lebanese Family With Basel-Vanagaite-Smirin-Yosef Syndrome: Possible Founder Mutation | Authors | Molecular Syndromology | 2019
Describes a recurrent MED25 mutation in multiple Lebanese families and discusses the possibility of an underlying regional founder mutation.
81. Population-Specific Genetic Heterogeneity of Familial Hypercholesterolemia in South Africa | Authors | Current Opinion in Lipidology | 2018
Reviews several population-specific familial-hypercholesterolemia founder mutations in South Africa, including variants associated with Afrikaner, Ashkenazi Jewish and other communities.
82. An Ashkenazi Founder Mutation in the PKHD1 Gene | Authors | European Journal of Medical Genetics | 2016
Identifies a shared PKHD1 haplotype and founder mutation associated with autosomal recessive polycystic kidney disease in Ashkenazi Jewish families.
83. Nationwide Study on Hypertrophic Cardiomyopathy in Iceland: Evidence of a MYBPC3 Founder Mutation | Authors | Circulation | 2014
Finds that a MYBPC3 variant introduced centuries ago accounts for a large fraction of hypertrophic cardiomyopathy cases in Iceland and demonstrates the clinical impact of a founder mutation.
84. A Recurrent Mutation in DEPDC5 Predisposes to Focal Epilepsies in the French-Canadian Population | Authors | Clinical Genetics | 2014
Identifies an ancestral DEPDC5 mutation among French Canadian families with focal epilepsy, illustrating how regional founder effects influence neurological disease.
85. A Founder Mutation in PET100 Causes Isolated Complex IV Deficiency in Lebanese Individuals With Leigh Syndrome | Sze Chern Lim et al. | American Journal of Human Genetics | 2014
Identifies a shared PET100 mutation among Lebanese families with mitochondrial complex IV deficiency and Leigh syndrome, supported by linkage and haplotype evidence.
86. Homozygous Founder Mutation in Desmocollin-2 Causes Arrhythmogenic Cardiomyopathy in the Hutterite Population | Brenda Gerull et al. | Circulation: Cardiovascular Genetics | 2013
Describes a DSC2 founder mutation causing severe arrhythmogenic cardiomyopathy within the Hutterite population, demonstrating the medical consequences of founder history and endogamy.
87. Exploring the Transcriptomic Variation Caused by the Finnish Founder Mutation of Lysinuric Protein Intolerance | Maaria Tringham et al. | Molecular Genetics and Metabolism | 2012
Investigates differences in gene expression among Finnish patients who share the same SLC7A7 founder mutation, illustrating how identical founder variants can still produce variable clinical outcomes.
88. Evidence for a Founder Mutation Causing DFNA5 Hearing Loss in East Asians | Authors | Journal of Human Genetics | 2010
Compares Korean and Chinese families carrying the same hearing-loss mutation and finds a shared haplotype supporting descent from a common ancestral mutation.
89. ERCC6 Founder Mutation Identified in Finnish Patients With COFS Syndrome | E. Jaakkola et al. | Clinical Genetics | 2010
Identifies a shared ERCC6 mutation in northern Finnish families with cerebro-oculo-facio-skeletal syndrome and traces affected individuals to common eighteenth-century ancestry.
90. A High Frequent BRCA1 Founder Mutation Identified in the Greenlandic Population | Theresa Larriba Harboe et al. | Familial Cancer | 2009
Documents a recurrent BRCA1 mutation in Greenland and investigates its importance for hereditary breast and ovarian cancer within this relatively small population.
91. An Evaluation of BRCA1 and BRCA2 Founder Mutations Penetrance Estimates for Breast Cancer Among Ashkenazi Jewish Women | Authors | Genetics in Medicine | 2005
Evaluates estimates of breast-cancer penetrance among carriers of the three major Ashkenazi BRCA founder mutations and examines how different epidemiological assumptions influence risk estimates.
92. BRCA1 and BRCA2 Founder Mutations and the Risk of Colorectal Cancer | Authors | Journal of the National Cancer Institute | 2004
Examines whether major Ashkenazi BRCA founder mutations also substantially increase colorectal-cancer risk, illustrating how founder variants can be studied across multiple disease outcomes.
93. The Founder Mutation MSH2 1906G→C Is an Important Cause of Hereditary Nonpolyposis Colorectal Cancer in the Ashkenazi Jewish Population | William D. Foulkes et al. | American Journal of Human Genetics | 2002
Identifies a recurrent MSH2 variant associated with Lynch syndrome and demonstrates a shared surrounding haplotype consistent with descent from a common founder.
94. Prevalence of Founder BRCA1 and BRCA2 Mutations in Unselected French Canadian Women With Breast Cancer | Authors | Clinical Genetics | 2001
Tests French Canadian breast-cancer patients for known regional BRCA founder mutations and illustrates how founder history can influence population-specific genetic screening strategies.
95. The I1307K APC Polymorphism: Prevalence in Non-Ashkenazi Jews and Evidence for a Founder Effect | Authors | Genetic Testing | 2001
Investigates the colorectal-cancer-associated APC I1307K variant in several Jewish populations and finds haplotype evidence supporting descent from a common ancestral mutation.
96. Maple Syrup Urine Disease: Identification and Carrier-Frequency Determination of a Novel Founder Mutation in the Ashkenazi Jewish Population | Authors | American Journal of Human Genetics | 2001
Identifies a common BCKDHB mutation among Ashkenazi Jewish families with maple syrup urine disease and estimates its carrier frequency in the broader population.
97. A Deletion Mutation in GJB6 Cooperating With a GJB2 Mutation in Non-Syndromic Deafness | Authors | Human Mutation | 2001
Reports a shared deletion haplotype in Ashkenazi Jewish families with inherited hearing loss and concludes that the recurrent deletion represents a founder mutation.
98. Single Founder Mutation W380G in Type II Protein C Deficiency in Finland | A. Levo et al. | Thrombosis and Haemostasis | 2000
Shows that a single PROC mutation accounts for most Finnish families with type II protein C deficiency and traces the mutation to a geographically restricted ancestral origin.
99. The Prevalence of Common BRCA1 and BRCA2 Mutations Among Ashkenazi Jews | Patricia Hartge et al. | American Journal of Human Genetics | 1999
Measures the population prevalence of three well-known Ashkenazi Jewish BRCA1 and BRCA2 founder variants and discusses their implications for hereditary breast and ovarian cancer risk.
100. Molecular Characterization of Wilson Disease in the Sardinian Population — Evidence of a Founder Effect | G. Loudianos et al. | Human Mutation | 1999
Analyzes ATP7B mutations in Sardinia and identifies recurrent variants and haplotypes associated with the island's unusually high incidence of Wilson disease.
101. A Molecular Survey of Phenylketonuria in Iceland: Identification of a Founding Mutation | Authors | Human Genetics | 1998
Identifies an Icelandic phenylketonuria mutation accounting for a large fraction of disease chromosomes and shows haplotype and genealogical evidence of enrichment through a founder effect.
102. Common Founder Mutation in the LDL Receptor Gene Causing Familial Hypercholesterolaemia in the Icelandic Population | V. Gudnason et al. | Human Mutation | 1997
Identifies an LDLR mutation responsible for a large proportion of Icelandic familial hypercholesterolemia and uses haplotypes and genealogy to support a common-founder origin.
103. Origin and Migration of an Afrikaner Founder Mutation Causing Familial Hypercholesterolemia | J. C. Defesche et al. | Gene Geography | 1996
Uses genetic and genealogical evidence to trace an important Afrikaner LDL-receptor mutation through Dutch and German ancestry and into South Africa and Canada.
104. A Common Lithuanian Mutation Causing Familial Hypercholesterolemia in Ashkenazi Jews | Authors | American Journal of Human Genetics | 1991
Characterizes an LDL-receptor founder mutation especially common among Ashkenazi families of Lithuanian ancestry and traces its distribution into Jewish communities elsewhere.
Cancer Founder Mutations
105. Frequency of Founder Mutations in BRCA1 and BRCA2 Genes in Hereditary Breast Cancers in Poland vs. Other Countries | Beata Kulikowska et al. | Cancers | 2026
Reviews the distribution and clinical relevance of BRCA founder mutations in Poland and compares them with founder variants reported in populations around the world.
106. Dutch Founder SDHB Exon 3 Deletion in Patients With Pheochromocytoma-Paraganglioma in South Africa | Authors | Endocrine Connections | 2022
Detects a known Dutch SDHB founder deletion in South African patients, illustrating how migration can transport founder variants into distant populations.
107. Mexican BRCA1 Founder Mutation: Shortening the Gap in Genetic Assessment for Hereditary Breast and Ovarian Cancer Patients | Veronica Fragoso-Ontiveros et al. | PLOS ONE | 2019
Evaluates targeted testing for a deletion of BRCA1 exons 9–12 that is enriched in Mexican hereditary breast and ovarian cancer patients because of a founder effect.
108. Prevalence, Spectrum, and Founder Effect of BRCA1 and BRCA2 Mutations in Epithelial Ovarian Cancer From the Middle East | Authors | Human Mutation | 2019
Identifies recurrent BRCA mutations in Middle Eastern ovarian cancer patients and demonstrates shared haplotypes for two variants consistent with founder effects.
109. BRCA1 and BRCA2 Mutation Spectrum—An Update on Mutation Distribution in a Large Cancer Genetics Clinic in Norway | Authors | Hereditary Cancer in Clinical Practice | 2018
Shows that established Norwegian founder mutations remain common but that full sequencing reveals substantially greater BRCA diversity than founder-only screening detects.
110. Haplotype Analysis Suggests That the MLH1 c.2059C>T Mutation Is a Swedish Founder Mutation | Authors | Hereditary Cancer in Clinical Practice | 2018
Finds a shared chromosomal haplotype among Swedish and Finnish Lynch syndrome families, supporting a northern Swedish ancestral origin.
111. New EPCAM Founder Deletion in Polish Population | Authors | Clinical Genetics | 2017
Identifies a recurrent EPCAM deletion in Polish Lynch syndrome families and establishes it as an important regional founder mutation.
112. Mutational Spectrum in Breast Cancer Associated BRCA1 and BRCA2 Genes in Colombia | Authors | Colombia Médica | 2017
Describes recurrent Colombian BRCA variants and evaluates the contribution of previously identified founder mutations to hereditary breast cancer testing.
113. Characterization of an Italian Founder Mutation in the RING-Finger Domain of BRCA1 | Laura Caleca et al. | PLOS ONE | 2014
Characterizes the BRCA1 c.190T>C mutation concentrated in northern Italy and estimates that the ancestral mutation originated several thousand years ago.
114. The Spectrum of BRCA1 and BRCA2 Mutations in Breast Cancer Patients in the Bahamas | M. R. Akbari et al. | Clinical Genetics | 2014
Finds that most BRCA mutation carriers in a Bahamian breast-cancer cohort carried one of a small number of founder mutations.
115. An Ashkenazi Founder Mutation in the MSH6 Gene Leading to HNPCC | Authors | Familial Cancer | 2010
Reports a recurrent truncating MSH6 mutation among unrelated Ashkenazi Jewish Lynch syndrome families and concludes that it probably derives from a founder.
116. Founder Mutations Account for the Majority of BRCA1-Attributable Hereditary Breast/Ovarian Cancer Cases in Tuscany | Laura Papi et al. | Breast Cancer Research and Treatment | 2009
Shows that several recurrent BRCA1 founder mutations account for much of hereditary breast and ovarian cancer in part of Tuscany.
117. G1738R Is a BRCA1 Founder Mutation in Greek Breast/Ovarian Cancer Patients | Authors | Clinical Genetics | 2008
Provides genetic and genealogical evidence that the BRCA1 G1738R variant represents an ancestral Greek founder mutation.
118. 4843delC of the BRCA1 Gene Is a Possible Founder Mutation in Southern Italy | Authors | Annals of Oncology | 2007
Uses haplotype analysis in Sicilian families to investigate a recurrent BRCA1 mutation and finds evidence consistent with a regional founder origin.
119. Identification of a Founder BRCA2 Mutation in Sardinian Breast Cancer Families | Maria Monne et al. | Familial Cancer | 2007
Describes another recurrent BRCA2 mutation in Sardinian families from the same geographic area and demonstrates a shared ancestral haplotype.
120. The Western Swedish BRCA1 Founder Mutation 3171ins5 | Annika Bergman et al. | European Journal of Human Genetics | 2001
Uses haplotype analysis to estimate the age of a major western Swedish BRCA1 founder mutation and reconstruct its long-term persistence in the regional population.
121. A Founder Mutation of the BRCA1 Gene in Western Sweden Associated With a High Incidence of Breast and Ovarian Cancer | Zakaria Einbeigi et al. | European Journal of Cancer | 2001
Finds the same BRCA1 mutation in numerous western Swedish cancer families, demonstrating the clinical importance of a geographically concentrated founder variant.
122. Evidence of a Founder Mutation of BRCA1 in a Highly Homogeneous Population From Southern Italy | Authors | Annals of Oncology | 2001
Identifies BRCA1 5083del19 at high frequency in Calabrian breast and ovarian cancer families and finds a shared haplotype supporting common ancestry.
123. Founder Mutations in the BRCA1 Gene in Polish Families With Breast-Ovarian Cancer | Authors | American Journal of Human Genetics | 2000
Shows that a relatively small number of recurrent BRCA1 mutations account for a substantial proportion of hereditary breast and ovarian cancer families in Poland.
124. Identification of a Founder BRCA2 Mutation in Sardinia | Authors | British Journal of Cancer | 2000
Uses identity-by-descent analysis to identify the BRCA2 8765delAG mutation in multiple Sardinian breast-cancer families.
Neurological, Sensory, and Developmental Disorders
125. CLCC1 c.75C>A Mutation in Pakistani-Derived Retinitis Pigmentosa Families Likely Originated With a Single Founder | Authors | Frontiers in Genetics | 2022
Uses shared haplotypes to estimate that a CLCC1 mutation carried by geographically dispersed Pakistani families arose from one ancestor thousands of years ago.
126. The Genetic Aetiology of Retinal Degeneration in Children in Finland—New Founder Mutations Identified | Kristiina Avela et al. | Acta Ophthalmologica | 2019
Identifies several Finnish founder mutations in retinal-disease genes, demonstrating how founder history can concentrate otherwise rare pathogenic variants.
127. A Founder Mutation in CERKL Is a Major Cause of Retinal Dystrophy in Finland | Kristiina Avela et al. | Acta Ophthalmologica | 2018
Identifies a CERKL mutation strongly enriched in Finland and shows how founder variants simplify molecular diagnosis of genetically heterogeneous retinal disease.
128. Founder Mutation in KCNJ10 in Pakistani Patients With EAST Syndrome | Authors | Molecular Genetics & Genomic Medicine | 2016
Shows that Pakistani EAST syndrome families share an ancestral KCNJ10 mutation estimated to have arisen roughly twenty generations ago.
129. Junctophilin 3 Expansion Mutations Causing Huntington Disease-Like 2 Are Common in South African Patients With African Ancestry | Authors | Clinical Genetics | 2015
Finds evidence that Huntington disease-like 2 mutations in JPH3 share a common African founder and spread with African diaspora populations.
130. A Nonsense Mutation in FAM161A Is a Recurrent Founder Allele in Dutch and Belgian Individuals With Autosomal Recessive Retinitis Pigmentosa | Authors | Investigative Ophthalmology & Visual Science | 2015
Finds a shared haplotype surrounding FAM161A p.Arg437*, indicating that the mutation originated from a common ancestor.
131. Dominant GDAP1 Founder Mutation Is a Common Cause of Axonal Charcot-Marie-Tooth Disease in Finland | Mari Auranen et al. | Neurogenetics | 2013
Identifies a GDAP1 founder mutation responsible for a significant fraction of Finnish autosomal dominant axonal Charcot-Marie-Tooth disease.
132. Hereditary Spastic Paraplegia: Clinical Genetic Study of 15 Families | Authors | Archives of Neurology | 2004
Identifies the same SPG4 mutation in multiple southern Scottish families and finds haplotype evidence supporting descent from a common founder.
133. A Founder Mutation in Presenilin 1 Causing Early-Onset Alzheimer Disease in Unrelated Caribbean Hispanic Families | E. S. Athan et al. | JAMA | 2001
Identifies the PSEN1 Gly206Ala mutation in multiple apparently unrelated Caribbean Hispanic families with early-onset Alzheimer disease, consistent with common ancestry.
134. A Founder Mutation in French-Canadian Families With X-Linked Hereditary Neuropathy | N. Dupré et al. | Canadian Journal of Neurological Sciences | 2001
Finds the same GJB1 mutation in several French Canadian Charcot-Marie-Tooth families and uses haplotype analysis to demonstrate shared ancestry.
Hearing, Kidney, and Multisystem Disorders
135. A Founder Mutation in EHD1 Presents With Tubular Proteinuria and Deafness | Naomi Issler et al. | Journal of the American Society of Nephrology | 2022
Identifies a founder mutation in EHD1 associated with a previously unrecognized combination of renal tubular dysfunction and hearing loss.
136. Osteogenesis Imperfecta Type 3 in South Africa: Causative Mutations in FKBP10 | Authors | South African Medical Journal | 2017
Shows that a recurrent FKBP10 mutation causing severe osteogenesis imperfecta in southern African populations is identical by descent from a common ancestor.
137. A Mayan Founder Mutation Is a Common Cause of Deafness in Guatemala | C. Carranza et al. | Clinical Genetics | 2016
Identifies a recurrent hearing-loss mutation concentrated among people of Mayan ancestry and demonstrates a conserved ancestral haplotype.
138. A Founder Mutation in MYO7A Underlies a Significant Proportion of Usher Syndrome in Indigenous South Africans | Lisa Roberts et al. | Investigative Ophthalmology & Visual Science | 2015
Shows that a single MYO7A mutation accounts for a substantial proportion of Usher syndrome cases studied among Indigenous South Africans.
139. Hematological Consequences of a FANCG Founder Mutation in Black South African Patients With Fanconi Anemia | Authors | Pediatric Blood & Cancer | 2015
Examines clinical outcomes among South African patients homozygous for a population-specific FANCG founder mutation.
140. A Founder Mutation in COL4A3 Causes Autosomal Recessive Alport Syndrome in the Ashkenazi Jewish Population | Authors | Clinical Genetics | 2014
Identifies an Ashkenazi COL4A3 founder deletion and estimates its population carrier frequency, highlighting its relevance for Alport syndrome testing.
141. Phenotypic Consequences in Black South African Fanconi Anemia Patients Homozygous for a Founder Mutation | Candice Feben et al. | Genetics in Medicine | 2014
Characterizes physical and developmental variation among patients carrying the same FANCG founder mutation, demonstrating substantial phenotype variation despite shared genotype.
142. A Founder Mutation in BBS2 Is Responsible for Bardet-Biedl Syndrome in the Hutterite Population | A. M. Innes et al. | Clinical Genetics | 2010
Uses SNP mapping and sequencing to identify a BBS2 splice-site founder mutation responsible for multiple Bardet-Biedl syndrome cases among Hutterites.
143. Mutations of DNAI1 in Primary Ciliary Dyskinesia: Evidence of Founder Effect in a Common Mutation | Authors | American Journal of Respiratory and Critical Care Medicine | 2006
Examines a recurrent DNAI1 mutation in primary ciliary dyskinesia and uses genetic evidence to distinguish a founder mutation from a mutational hot spot.
144. The Most Common Mutation in FKRP Causing Limb Girdle Muscular Dystrophy Type 2I May Have Occurred Only Once | Authors | Human Mutation | 2005
Finds a common haplotype around the FKRP L276I mutation in Hutterite and non-Hutterite patients, suggesting a single ancient founder mutation of European origin.
Metabolic and Cardiovascular Founder Mutations
145. Age, Origin and Functional Study of the Prevalent LDLR Mutation Causing Familial Hypercholesterolaemia in Gran Canaria | Authors | Genes | 2023
Uses haplotypes and demographic history to estimate when a prevalent Canary Islands LDLR founder mutation originated and experimentally examines its functional effects.
146. Founder Mutation in N Terminus of Cardiac Troponin I Causes Malignant Hypertrophic Cardiomyopathy | Akl C. Fahed et al. | Circulation: Genomic and Precision Medicine | 2020
Characterizes an ancestral cardiac troponin I mutation associated with severe hypertrophic cardiomyopathy and sudden-death risk.
147. A Middle Eastern Founder Mutation Expands the Genotypic and Phenotypic Spectrum of Mitochondrial MICU1 Deficiency | Sara Musa et al. | JIMD Reports | 2019
Reports a recurrent MICU1 loss-of-function mutation in multiple Middle Eastern families and shows how a founder variant can produce variable clinical manifestations.
148. CFTR Founder Mutation Causes Protein Trafficking Defects in Chinese Patients With Cystic Fibrosis | Gordon K. C. Leung et al. | Molecular Genetics & Genomic Medicine | 2017
Identifies CFTR p.I1023R as a founder mutation among southern Han Chinese cystic-fibrosis patients and demonstrates defective protein trafficking.
149. Combined Gating and Trafficking Defect in Kv11.1 Manifests as a Malignant Long QT Syndrome Phenotype in a Large Danish Founder Family | Authors | Annals of Medicine | 2016
Estimates the age of the Danish KCNH2 p.F29L founder mutation and examines how the mutation alters cardiac potassium-channel function.
150. Mutations in Danish Patients With Long QT Syndrome and Identification of a Large Founder Family With p.F29L in KCNH2 | Authors | BMC Medical Genetics | 2014
Describes a recurrent KCNH2 mutation found in several apparently unrelated Danish families and identifies a large underlying founder pedigree.
151. Limited Mutational Heterogeneity in the LDLR Gene in Familial Hypercholesterolemia in Tunisia | Authors | Atherosclerosis | 2009
Identifies a recurrent LDLR frameshift mutation that appears to represent a major Tunisian founder mutation causing familial hypercholesterolemia.
152. Genetics of Haemochromatosis | Adrian Bomford | The Lancet | 2002
Reviews the widespread northern European HFE C282Y founder mutation and discusses its high frequency, variable penetrance and implications for disease screening.
153. A Founder Mutation of the Potassium Channel KCNQ1 in Long QT Syndrome | K. Piippo et al. | Journal of the American College of Cardiology | 2001
Shows that a single KCNQ1 founder mutation accounts for a large proportion of Finnish long-QT syndrome families.
154. The Hemochromatosis Founder Mutation in HLA-H Disrupts Beta2-Microglobulin Interaction and Cell Surface Expression | J. N. Feder et al. | Journal of Biological Chemistry | 1997
Demonstrates the functional consequences of the C282Y hemochromatosis founder mutation, showing that it disrupts normal protein trafficking and surface expression.
Animals, Plants, Islands, and Conservation Genetics
155. Conservation Arks: Genomic Erosion and Inbreeding in an Abundant Island Population of Koalas | Authors | Molecular Ecology | 2025
Whole-genome analysis shows that Kangaroo Island koalas descended from a small translocated population have markedly reduced genomic diversity despite becoming numerically abundant.
156. Integrating In Situ Strategies and Molecular Genetics for the Conservation of the Endangered Azorean Endemic Plant Lotus azoricus | Authors | Plants | 2025
Uses genetic analyses to evaluate conservation reinforcements in an endangered island plant and detects a distinct founder effect among translocated individuals.
157. Absence of Founder Effect and Evidence for Adaptive Divergence in a Recently Introduced Insular Population of White-Tailed Deer | Jérémie Fuller et al. | Molecular Ecology | 2020
Finds substantial phenotypic and genetic divergence in island deer without the strong genome-wide loss of diversity expected from a classic founder effect, highlighting the role of selection.
158. Founder Effects, Post-Introduction Evolution and Phenotypic Plasticity Contribute to Invasion Success of a Genetically Impoverished Invader | Zhi-Yong Liao et al. | Oecologia | 2020
Examines Chromolaena odorata and separates phenotypic differences resulting from founder effects, later evolutionary change and plastic responses to the environment.
159. Initial Founders of Captive Populations Are Genetically Representative of Natural Populations in Critically Endangered Dusky Gopher Frogs | Authors | Zoo Biology | 2016
Evaluates whether founders selected for captive breeding captured the limited genetic diversity remaining in wild dusky gopher frog populations.
160. Hidden Founder Effects: Small-Scale Spatial Genetic Structure in Recently Established Populations of Anthyllis vulneraria | Authors | Heredity | 2015
Shows that newly founded plant populations may retain high overall diversity while still developing strong fine-scale genetic structure and elevated inbreeding.
161. Founder Event and Its Effect on Genetic Variation in Translocated Populations of Noble Crayfish | Authors | Journal of Applied Genetics | 2015
Compares newly established crayfish populations with their sources and finds that carefully managed translocations can retain much of the genetic diversity available in source populations.
162. Long-Distance Plant Dispersal to North Atlantic Islands: Colonization Routes and Founder Effect | Authors | AoB PLANTS | 2015
Compares 25 plant species and finds that founder effects vary with dispersal distance, island area, pollination system and mating strategy.
163. Different Evolutionary Processes in Shaping the Genetic Composition of Dendrobium nobile in Southwest China | Authors | Biochemical Systematics and Ecology | 2015
Finds low diversity and substantial differentiation in an island population and concludes that founder-related genetic drift played an important role.
164. Patterns of Genetic Diversity Reveal Multiple Introductions and Recurrent Founder Effects During Range Expansion in Geranium carolinianum | R. Y. Shirk et al. | Heredity | 2014
Finds evidence for multiple independent introductions followed by repeated local founder events during the invasive expansion of Carolina geranium in China.
165. Founder Effects, Inbreeding, and Loss of Genetic Diversity in Four Avian Reintroduction Programs | Ian G. Jamieson | Conservation Biology | 2011
Compares four New Zealand bird reintroductions and shows how founder number, sex ratio and unequal reproductive success can determine subsequent inbreeding and genetic diversity.
166. Enhancing the Survival and Expansion Potential of a Founder Population Through Clonality | Authors | New Phytologist | 2010
Investigates an isolated plant founder population and shows how vegetative reproduction and somatic mutation may help persistence despite severe initial genetic limitation.
167. Colonization Genetics of an Animal-Dispersed Plant at Mount St Helens | Authors | Molecular Ecology | 2008
Studies black huckleberry colonization following the Mount St. Helens eruption and finds that multiple source populations and long-distance dispersal prevented a strong loss of genetic diversity.
168. Founding Events in Species Invasions: Genetic Variation, Adaptive Evolution, and the Role of Multiple Introductions | Katrina M. Dlugosch and Ingrid M. Parker | Molecular Ecology | 2008
Reviews invasive species and concludes that genetic diversity loss during introduction is common but often moderated by multiple introductions and continuing gene flow.
169. Genetic Consequences of Animal Translocations: A Case Study Using the Field Cricket | Authors | Biological Conservation | 2008
Uses microsatellite data to investigate founder effects and loss of variation following conservation translocations of field crickets.
170. Molecular Evidence for a Founder Effect in Invasive House Finch Populations Experiencing an Emergent Disease Epidemic | Dana M. Hawley et al. | Molecular Ecology | 2006
Documents reduced genetic diversity in eastern North American house finches following their introduction and explores whether this founder history influenced vulnerability to an emerging infectious disease.
171. Northwestern Song Sparrow Populations Show Genetic Effects of Sequential Colonization | Christin L. Pruett and Kevin Winker | Molecular Ecology | 2005
Examines song sparrows across northwestern populations and finds evidence that sequential colonization can progressively reduce diversity and increase divergence.
172. Genetic Variability and Founder Effect in the Pitcher Plant Sarracenia purpurea in Populations Introduced Into Switzerland | Christian Parisod et al. | Annals of Botany | 2005
Studies how a plant introduced by relatively few individuals retained enough genetic and reproductive capacity to become invasive despite a strong initial founder event.
173. DNA Diversity in Hawaiian Endemic Plant Schiedea globosa | Authors | Heredity | 2004
Examines whether Hawaiian plant genetic structure is better explained by founder events, geographic isolation or ecological adaptation during island diversification.
174. Genetic Consequences of Sequential Founder Events by an Island-Colonizing Bird | Authors | Proceedings of the National Academy of Sciences | 2002
Studies historically documented silvereye colonizations and finds that single founder events produced limited genetic change, whereas repeated sequential founding events generated stronger losses of diversity and divergence.
175. A Population Founded by a Single Pair of Individuals: Establishment, Expansion, and Evolution | Peter R. Grant, B. Rosemary Grant and Kenneth Petren | Genetica | 2001
Documents establishment and subsequent evolution of a Galápagos large ground finch population founded by only a few birds, offering a rare naturally observed founder event.
176. Founder Effect in an Island Population of Bighorn Sheep | Authors | Molecular Ecology | 2001
Shows that a desert bighorn sheep population founded by only twenty individuals on Tiburón Island retained substantially less genetic variation than comparison populations.
177. Small Mammal Differentiation on Islands | Authors | Biological Journal of the Linnean Society | 1996
Reviews how founder events, drift, selection and isolation contribute to differentiation of island mammal populations and considers their possible role in speciation.
178. Mitochondrial DNA of the Mauritian Macaques: An Example of the Founder Effect | S. H. Lawler, R. W. Sussman and L. L. Taylor | American Journal of Physical Anthropology | 1995
Compares macaques introduced to Mauritius several centuries ago with Asian source populations and documents the genetic legacy of their small founding population.
179. Founder Effects and Geographical Variation in the Invading Cladoceran Bosmina coregoni in North America | Rita Demelo and Paul D. N. Hebert | Heredity | 1994
Examines an aquatic invasive species and finds unexpectedly high genetic variation in North American populations, suggesting founding populations were larger or more diverse than a simple severe-founder model predicts.
Invasive Species, Pathogens, and Experimental Evolution
180. Serial Founder Effects Slow Range Expansion in an Invasive Social Insect | Authors | Proceedings of the Royal Society B | 2024
Finds declining genetic diversity toward the expanding range edge of invasive Asian honey bees and shows that repeated founder effects can reduce colony fitness and slow geographic expansion.
181. Post-Invasion Selection Acts on Standing Genetic Variation Despite a Severe Founding Bottleneck | Authors | Current Biology | 2024
Genomic time-series data suggest Australia's invasive Asian honey bee population may have originated from as little as one colony, yet natural selection subsequently acted on variation retained by the founders.
182. Evidence for Serial Founder Events During the Colonization of North America by the Yellow Fever Mosquito, Aedes aegypti | Authors | Scientific Reports | 2022
Genomic data from North American mosquito populations support an expansion involving successive founder events, with genetic diversity generally decreasing during westward colonization.
183. Founder Effects on Sex Determination Systems in Invasive Social Insects | Authors | Current Opinion in Insect Science | 2021
Reviews how reduced genetic diversity following invasion can affect complementary sex determination in ants, bees and wasps, potentially increasing production of infertile diploid males.
184. An Island-Hopping Bird Reveals How Founder Events Shape Genome-Wide Divergence | Authors | Molecular Ecology | 2021
Uses genomic data from successive island-colonization events to show progressive loss of rare alleles and genome-wide divergence, while finding that founder events alone do not provide a rapid shortcut to speciation.
185. On the Founder Effect in COVID-19 Outbreaks: How Many Infected Travelers May Have Started Them All? | Authors | National Science Review | 2020
Applies population-genetic founder-effect reasoning to early SARS-CoV-2 epidemics and asks how viral diversity can help estimate the number of infected individuals initiating regional outbreaks.
186. Founder Effects and Species Introductions: A Host Versus Parasite Perspective | April M. H. Blakeslee et al. | Evolutionary Applications | 2019
Compares introduced mudsnails with their trematode parasites and finds substantially stronger founder effects in some parasites than in their hosts, demonstrating how life history influences colonization genetics.
187. A Serial Founder Effect Model of Phonemic Diversity Based on Phonemic Loss in Low-Density Populations | Joaquim Pérez-Losada and Joaquim Fort | PLOS ONE | 2018
Develops a mathematical model exploring whether repeated population-founding events and demographic changes could generate the observed worldwide geographic pattern in language phoneme diversity.
188. Founder Effects Persist Despite Adaptive Differentiation: A Field Experiment With Lizards | Jason J. Kolbe et al. | Science | 2012
Establishes replicate brown-anole populations from randomly selected founders and shows that initial founder-generated differences persisted even as natural selection drove parallel adaptation.
189. Rejection of a Serial Founder Effects Model of Genetic and Linguistic Coevolution | Keith Hunley et al. | Proceedings of the Royal Society B | 2012
Tests claims that language phoneme diversity follows the same serial-founder pattern as neutral human genetic diversity and finds important discrepancies between linguistic and genetic predictions.
190. How Repeatable Is Adaptive Evolution? The Role of Geographical Origin and Founder Effects in Laboratory Adaptation | Pedro Simões et al. | Evolution | 2008
Uses replicate Drosophila populations to test how geographic background and random genetic sampling during founding affect later adaptation.
191. Mitochondrial Cytochrome b Analysis Reveals Two Invasive Lionfish Species With Strong Founder Effects in the Western Atlantic | R. M. Hamner, D. W. Freshwater and P. E. Whitfield | Journal of Fish Biology | 2007
Finds sharply reduced mitochondrial diversity in invasive Atlantic lionfish compared with native Indo-Pacific populations, indicating a substantial founder effect.
192. A Direct Experimental Test of Founder-Flush Effects on the Evolutionary Potential for Assortative Mating | J. L. Regan, L. M. Meffert and E. H. Bryant | Journal of Evolutionary Biology | 2003
Experimentally tests the prediction that severe bottlenecks followed by rapid growth can increase the evolutionary potential for assortative mating and reproductive isolation.
193. Apparent Founder Effect During the Early Years of the San Francisco HIV-1 Epidemic | Authors | AIDS Research and Human Retroviruses | 2000
Analysis of HIV-1 sequences preserved from San Francisco in 1978–1979 found low early viral diversity and a recent common ancestry, consistent with rapid expansion from a limited number of founding viral lineages.
194. Consequences of the Founder Effect in the Genetic Structure of Introduced Island Coral Reef Fish Populations | S. Planes and G. Lecaillon | Biological Journal of the Linnean Society | 1998
Uses fish deliberately introduced from French Polynesia to Hawaii to test how small founding populations alter allele frequencies and genetic diversity.
