Genetic admixture of Chinese Tajik people inferred from genome-wide array genotyping and mitochondrial genome sequencing

IF 3.7 1区 生物学 Q1 Agricultural and Biological Sciences Journal of Systematics and Evolution Pub Date : 2023-05-30 DOI:10.1111/jse.12957
Jing Zhao, Qiao Wu, Xin-Hong Bai, Edward Allen, Meng-Ge Wang, Guang-Lin He, Jian-Xin Guo, Xiao-Min Yang, Jian-Xue Xiong, Zi-Xi Jiang, Xiao-Yan Ji, Hui Wang, Jing-Ze Tan, Shao-Qing Wen, Chuan-Chao Wang
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Abstract

Chinese Tajiks are an Indo-Iranian-speaking population in Xinjiang, northwest China. Although the complex demographic history has been characterized, the ancestral sources and genetic admixture of Indo-Iranian-speaking groups in this region remain poorly understood. We here provide the genome-wide genotyping data for over 700 000 single-nucleotide polymorphisms (SNPs) and mtDNA multiplex sequencing data in 64 Chinese male Tajik individuals from two dialect groups, Wakhi and Selekur. We applied principal component analysis (PCA), ADMIXTURE, f-statistics, treemix, qpWave/qpAdm, Admixture-induced Linkage Disequilibrium for Evolutionary Relationships (ALDER), and Fst analyses to infer a fine-scale population genetic structure and admixture history. Our results reveal that Chinese Tajiks showed the closest affinity and similar genetic admixture pattern with ancient Xinjiang populations, especially Xinjiang samples in the historical era. Chinese Tajiks also have gene flow from European and Neolithic Iran farmers-related populations. We observed a genetic substructure in the two Tajik dialect groups. The Selekur-speaking group who lived in the county had more gene flow from East Asians than Wakhi-speaking people who inhabited the village. These results document the population movements contributed to the influx of diverse ancestries in the Xinjiang region.

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通过全基因组阵列基因分型和线粒体基因组测序推断中国塔吉克人的遗传混血情况
中国塔吉克族是中国西北部新疆的一个讲印度-伊朗语的群体。虽然复杂的人口历史已被描述,但对该地区讲印度-伊朗语群体的祖先来源和遗传混杂情况仍然知之甚少。在此,我们提供了来自瓦其语和塞勒库尔语两个方言区的 64 名中国男性塔吉克人超过 70 万个单核苷酸多态性(SNPs)的全基因组分型数据和 mtDNA 多重测序数据。我们应用主成分分析(PCA)、ADMIXTURE、f 统计、treemix、qpWave/qpAdm、进化关系的混杂诱导连锁非平衡(ALDER)和 Fst 分析来推断种群的精细遗传结构和混杂历史。结果表明,中国塔吉克人与古代新疆人群,尤其是历史时期的新疆样本表现出最接近的亲缘关系和相似的遗传掺杂模式。中国塔吉克人也有来自欧洲和新石器时代伊朗农民相关人群的基因流。我们在两个塔吉克方言群中观察到了遗传亚结构。居住在县城的塞勒库尔语群体比居住在村子里的瓦希语群体有更多来自东亚人的基因流。这些结果证明,新疆地区的人口迁移促成了不同祖先的流入。
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来源期刊
Journal of Systematics and Evolution
Journal of Systematics and Evolution Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
7.40
自引率
8.10%
发文量
1368
审稿时长
6-12 weeks
期刊介绍: Journal of Systematics and Evolution (JSE, since 2008; formerly Acta Phytotaxonomica Sinica) is a plant-based international journal newly dedicated to the description and understanding of the biological diversity. It covers: description of new taxa, monographic revision, phylogenetics, molecular evolution and genome evolution, evolutionary developmental biology, evolutionary ecology, population biology, conservation biology, biogeography, paleobiology, evolutionary theories, and related subjects.
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