作者: Monika Karmin , Lauri Saag , Mário Vicente , Melissa A. Wilson Sayres , Mari Järve
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摘要: It is commonly thought that human genetic diversity in non-African populations was shaped primarily by an out-of-Africa dispersal 50-100 thousand yr ago (kya). Here, we present a study of 456 geographically diverse high-coverage Y chromosome sequences, including 299 newly reported samples. Applying ancient DNA calibration, date the Y-chromosomal most recent common ancestor (MRCA) Africa at 254 (95% CI 192-307) kya and detect cluster major founder haplogroups narrow time interval 47-52 kya, consistent with rapid initial colonization model Eurasia Oceania after bottleneck. In contrast to demographic reconstructions based on mtDNA, infer second strong bottleneck Y-chromosome lineages dating last 10 ky. We hypothesize this caused cultural changes affecting variance reproductive success among males.