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A recent bottleneck of Y chromosome diversity coincides with a global change in culture.
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2015 (engelsk)Inngår i: Genome Research, ISSN 1088-9051, E-ISSN 1549-5469, Vol. 25, nr 4Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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, we date the Y-chromosomal most recent common ancestor (MRCA) in Africa at 254 (95% CI 192-307) kya and detect a cluster of major non-African founder haplogroups in a narrow time interval at 47-52 kya, consistent with a rapid initial colonization model of Eurasia and Oceania after the out-of-Africa bottleneck. In contrast to demographic reconstructions based on mtDNA, we infer a second strong bottleneck in Y-chromosome lineages dating to the last 10 ky. We hypothesize that this bottleneck is caused by cultural changes affecting variance of reproductive success among males.

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2015. Vol. 25, nr 4
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-270875DOI: 10.1101/gr.186684.114PubMedID: 25770088OAI: oai:DiVA.org:uu-270875DiVA, id: diva2:913303
Tilgjengelig fra: 2016-03-21 Laget: 2016-01-04 Sist oppdatert: 2017-11-30

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