Journal of Systematics and Evolution >

2024 , Vol. 62 >Issue 1: 181 - 192

DOI: https://doi.org/10.1111/jse.12957

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

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  • 1. Ministry of Education Key Laboratory of Contemporary Anthropology, Department of Anthropology and Human Genetics, School of Life Sciences, Fudan University, Shanghai, 200433 China
    2. Department of Anthropology and Ethnology, Institute of Anthropology, School of Sociology and Anthropology, Xiamen University, Xiamen, 361005 Fujian, China
    3. These authors contributed equally to this work
    4. The Shanghai Anthropological Association, Shanghai, 200433 China
    5. Institute of Archaeological Science, Fudan University, Shanghai, 200433 China
    6. Center for the Belt and Road Archaeology and Ancient Civilizations (BRAAC), Fudan University, Shanghai, 200433 China
    7. State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361102 Fujian, China
    8. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361102 Fujian, China
    9. Institute of Artificial Intelligence, Xiamen University, Xiamen, 361102 Fujian, China

Received date: 26 Aug 2022

Accepted date: 21 Apr 2023

Published date: 20 Jan 2024

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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.

Key words： Chinese Tajiks; East Asia; genetic structure; population admixture; population history

Cite this article

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 . Genetic admixture of Chinese Tajik people inferred from genome-wide array genotyping and mitochondrial genome sequencing[J]. Journal of Systematics and Evolution, 2024 , 62(1) : 181 -192 . DOI: 10.1111/jse.12957

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