Quantitating and dating recent gene flow between European and East Asian populations.

Abstract:

:Historical records indicate that extensive cultural, commercial and technological interaction occurred between European and Asian populations. What have been the biological consequences of these contacts in terms of gene flow? We systematically estimated gene flow between Eurasian groups using genome-wide polymorphisms from 34 populations representing Europeans, East Asians, and Central/South Asians. We identified recent gene flow between Europeans and Asians in most populations we studied, including East Asians and Northwestern Europeans, which are normally considered to be non-admixed populations. In addition we quantitatively estimated the extent of this gene flow using two statistical approaches, and dated admixture events based on admixture linkage disequilibrium. Our results indicate that most genetic admixtures occurred between 2,400 and 310 years ago and show the admixture proportions to be highly correlated with geographic locations, with the highest admixture proportions observed in Central Asia and the lowest in East Asia and Northwestern Europe. Interestingly, we observed a North-to-South decline of European gene flow in East Asians, suggesting a northern path of European gene flow diffusing into East Asian populations. Our findings contribute to an improved understanding of the history of human migration and the evolutionary mechanisms that have shaped the genetic structure of populations in Eurasia.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Qin P,Zhou Y,Lou H,Lu D,Yang X,Wang Y,Jin L,Chung YJ,Xu S

doi

10.1038/srep09500

subject

Has Abstract

pub_date

2015-04-02 00:00:00

pages

9500

issn

2045-2322

pii

srep09500

journal_volume

5

pub_type

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