Genetic structure of Sino-Tibetan populations revealed by forensic STR loci

Hong-Bing Yao; Chuan-Chao Wang; Jiang Wang; Xiaolan Tao; Shao-Qing Wen; Qiajun Du; Qiongying Deng; Bingying Xu; Ying Huang; Hong-Dan Wang; Shujin Li; Bin Cong; Liying Ma; Li Jin; Johannes Krause; Hui Li

arXiv · 1503.01880

Genetic structure of Sino-Tibetan populations revealed by forensic STR loci

Hong-Bing Yao·Chuan-Chao Wang·Jiang Wang·Xiaolan Tao·Shao-Qing Wen·Qiajun Du·Qiongying Deng·Bingying Xu·Ying Huang·Hong-Dan Wang·Shujin Li·Bin Cong·Liying Ma·Li Jin·Johannes Krause·Hui Li

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Abstract

The origin and diversification of Sino-Tibetan populations have been a long-standing hot debate. However, the limited genetic information of Tibetan populations keeps this topic far from clear. In the present study, we genotyped 15 forensic autosomal STRs from 803 unrelated Tibetan individuals from Gansu Province (635 from Gannan and 168 from Tianzhu). We combined these data with published dataset to infer a detailed population affinities and admixture of Sino-Tibetan populations. Our results revealed that the genetic structure of Sino-Tibetan populations was strongly correlated with linguistic affiliations. Although the among-population variances are relatively small, the genetic components for Tibetan, Lolo-Burmese, and Han Chinese were quite distinctive, especially for the Deng, Nu, and Derung of Lolo-Burmese. Southern indigenous populations, such as Tai-Kadai and Hmong-Mien populations might have made substantial genetic contribution to Han Chinese and Altaic populations, but not to Tibetans. Likewise, Han Chinese but not Tibetan shared very similar genetic makeups with Altaic populations, which did not support the North Asian origin of Tibetan populations. The dataset generated here are also valuable for forensic identification.

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Hong-Bing Yao, Chuan-Chao Wang, Jiang Wang, Xiaolan Tao, Shao-Qing Wen, Qiajun Du, Qiongying Deng, Bingying Xu, Ying Huang, Hong-Dan Wang, Shujin Li, Bin Cong, Liying Ma, Li Jin, Johannes Krause, Hui Li. 2015-03-06. Genetic structure of Sino-Tibetan populations revealed by forensic STR loci. https://arxiv.org/abs/1503.01880

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