Oct 16, 2016

Integrating the signatures of demic expansion and archaic introgression in studies of human population genomics

Current Opinion in Genetics & Development
Lauren Alpert Sugden, Sohini Ramachandran

Abstract

Human population genomic studies have repeatedly observed a decrease in heterozygosity and an increase in linkage disequilibrium with geographic distance from Africa. While multiple demographic models can generate these patterns, many studies invoke the serial founder effect model, in which populations expand from a single origin and each new population's founders represent a subset of genetic variation in the previous population. The model assumes no admixture with archaic hominins, however, recent studies have identified loci in Homo sapiens bearing signatures of archaic introgression. These results appear to contradict the validity of analyses invoking the serial founder effect model, but we show these two perspectives are compatible. We also propose using the serial founder effect model as a null model for determining the signature of archaic admixture in modern human genomes at different geographic and genomic scales.

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References

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Citations

Mentioned in this Paper

Study
Patterns
Equine Laminitis
Genome
Dysequilibrium Syndrome
Genetics, Population
Metagenomics
Human Geography
Genomics
Cell Growth

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