An updated phylogeny of the human Y-chromosome lineage O2a-M95 with novel SNPs.

An updated phylogeny of the human Y-chromosome lineage O2a-M95 with novel SNPs.
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具有新 SNP 的人类 Y 染色体谱系 O2a-M95 的更新系统发育

DOI:
10.1371/journal.pone.0101020
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Su B
Su B
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhang X;Kampuansai J;Qi X;Yan S;Yang Z;Serey B;Sovannary T;Bunnath L;Aun HS;Samnom H;Kutanan W;Luo X;Liao S;Kangwanpong D;Jin L;Shi H;Su B

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虽然Y染色体O2 a-M95谱系是东亚人群中存在的主要单倍群之一,特别是在来自中国西南部和东南亚大陆的说南亚语的人群中,但迄今为止,由于仅分配给该谱系的一个下游SNP标记(M88),其单倍群缺乏结构。最近的一项基于阵列捕获的亚洲样本Y染色体测序已经产生了各种新的SNP,据称属于O2 a-M95谱系,但它们的系统发育位置尚未确定。在这项研究中,我们从柬埔寨,泰国和中国西南部的22个南亚语系人群中抽取了646名无关男性,并对样本人群中的12个SNP标记进行了基因分型,其中包括10个新报道的标记。在646名男性中,343名属于O2 a-M95谱系,证实了该Y染色体谱系在南亚语系人群中的优势地位。我们进一步通过定义5个分支来表征O2 a-M95的同源性:O2 a1 *-M95,O2 a1 a-F789,O2 a1 b *-F1252,O2 a1 b1 *-M88和O2 a1 b1 a-F761。这一更新的谱系学不仅提高了这一谱系的分辨率,而且还可以更好地追踪东亚和太平洋地区人类人口的史前史,这可能会对这些地区的语言多样化和人口流动模式产生新的见解。
Though the Y-chromosome O2a-M95 lineage is one of the major haplogroups present in eastern Asian populations, especially among Austro-Asiatic speaking populations from Southwestern China and mainland Southeast Asia, to date its phylogeny lacks structure due to only one downstream SNP marker (M88) assigned to the lineage. A recent array-capture-based Y chromosome sequencing of Asian samples has yielded a variety of novel SNPs purportedly belonging to the O2a-M95 lineage, but their phylogenetic positions have yet to be determined. In this study, we sampled 646 unrelated males from 22 Austro-Asiatic speaking populations from Cambodia, Thailand and Southwestern China, and genotyped 12 SNP makers among the sampled populations, including 10 of the newly reported markers. Among the 646 males, 343 belonged to the O2a-M95 lineage, confirming the supposed dominance of this Y chromosome lineage in Austro-Asiatic speaking populations. We further characterized the phylogeny of O2a-M95 by defining 5 sub-branches: O2a1*-M95, O2a1a-F789, O2a1b*-F1252, O2a1b1*-M88 and O2a1b1a -F761. This updated phylogeny not only improves the resolution of this lineage, but also allows for greater tracing of the prehistory of human populations in eastern Asia and the Pacific, which may yield novel insights into the patterns of language diversification and population movement in these regions.
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发表时间: 2012
期刊: PloS one
影响因子: 3.7
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