Y-chromosome diversity suggests southern origin and Paleolithic backwave migration of Austro-Asiatic speakers from eastern Asia to the Indian subcontinent.
Y-chromosome diversity suggests southern origin and Paleolithic backwave migration of Austro-Asiatic speakers from eastern Asia to the Indian subcontinent.
复制标题
Y染色体多样性表明南亚语系人从东亚到印度次大陆的南方起源和旧石器时代后波迁移
DOI：
10.1038/srep15486
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发表时间：
2015-10-20
影响因子：
4.6
通讯作者：
Su B
中科院分区：
文献类型：
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作者：
Zhang X;Liao S;Qi X;Liu J;Kampuansai J;Zhang H;Yang Z;Serey B;Sovannary T;Bunnath L;Seang Aun H;Samnom H;Kangwanpong D;Shi H;Su B
亚洲特定的Y染色体谱系（O2 a1-M95）的分析-在南亚（AA）讲人口，谁是孟加拉湾两侧的优势父系血统，导致两个相互竞争的假设，这组的地理起源和迁移路线。一种假设假定AA扬声器的起源在印度和向东扩散到东南亚，而另一个地方的起源在东南亚和向西扩散到印度。在这里，我们收集了来自东南亚大陆（MSEA）和中国南方的AA语言人群的样本，并对343名属于O2 a1-M95谱系的男性进行了16个Y-STR基因分型。结合我们的样本和以前的数据，我们分析了Y染色体和mtDNA的双链。我们全面了解了亚洲的O2 a1-M95谱系。我们证明，O2 a1-M95谱系起源于东亚南部的傣族人群中，大约2万至4万年前，然后在末次盛冰期之后向南扩散到东南亚，然后向西移动到印度次大陆。这种迁移导致了目前这种Y染色体谱系在说AA语的人群中的分布。对mtDNA多样性的进一步分析显示了不同的模式，支持先前提出的印度AA语人群的性别偏见混合物。
Analyses of an Asian-specific Y-chromosome lineage (O2a1-M95)—the dominant paternal lineage in Austro-Asiatic (AA) speaking populations, who are found on both sides of the Bay of Bengal—led to two competing hypothesis of this group’s geographic origin and migratory routes. One hypothesis posits the origin of the AA speakers in India and an eastward dispersal to Southeast Asia, while the other places an origin in Southeast Asia with westward dispersal to India. Here, we collected samples of AA-speaking populations from mainland Southeast Asia (MSEA) and southern China, and genotyped 16 Y-STRs of 343 males who belong to the O2a1-M95 lineage. Combining our samples with previous data, we analyzed both the Y-chromosome and mtDNA diversities. We generated a comprehensive picture of the O2a1-M95 lineage in Asia. We demonstrated that the O2a1-M95 lineage originated in the southern East Asia among the Daic-speaking populations ~20–40 thousand years ago and then dispersed southward to Southeast Asia after the Last Glacial Maximum before moving westward to the Indian subcontinent. This migration resulted in the current distribution of this Y-chromosome lineage in the AA-speaking populations. Further analysis of mtDNA diversity showed a different pattern, supporting a previously proposed sex-biased admixture of the AA-speaking populations in India.