YUAN Yuan, LI Hui
MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433 China
ABSTRACT: Central Asia is where population admixture takes place between eastern and western Eurasia [1]. However, little is known about the initial contact of the East and the West and the mechanism of the latter admixture. Ancient DNA plays an essential role in illustrating the migration events in history. In the past several decades, plentiful data of mitochondrial DNA (mtDNA) of ancient inhabitants in Xinjiang province in northwestern China have been published. The mtDNAs in Xinjiang included both eastern haplogroups (such as haplogroups A, B, D, and M) and western haplogroups (such as haplogroups H, J, K, and U). Moreover, genetic admixture has been observed as early as about 3800 years ago [2]. Interestingly, although ancient people carried more European craniofacial features, ancient mtDNA supports that eastern components are more dominant. Besides, we also examined more ancient mtDNA data of populations in the surrounding areas, and found that in Central Asia, the genetic components of the East decreased from the east to west, whereas the western component increased. The present analysis suggests that initial admixture of the eastern and western Eurasians might have happened 3800 years ago in most areas of Xinjiang province, the ancient people (about 2000 years ago) carried more eastern genetic components [3].
Recieved: Oct.10, 2010 Accepted: Dec.2, 2010 Corresponding: yuanyuan.fudan@gmail.com
《现代人类学通讯》第四卷e41篇 第200页 2010年12月16日网上发行
会议摘要
新疆古代人群线粒体DNA研究支持欧亚人群早期交流
袁媛,李辉
复旦大学生命科学学院现代人类学教育部重点实验室,上海200433
摘要:众所周知,欧洲人群和亚洲人群在中亚交流形成混合人群,如哈萨克斯坦、新疆等国家和地区的人群[1]。然而,欧亚交流何时发生,两个人群发生了怎样的交流等问题目前还尚未解决。古DNA研究是阐明历史上人群迁徙和交流的有效手段。过去的几十年里产生了大量的古DNA研究结果,其中包括中国新疆古代居民的古DNA研究。历史上,新疆有大量的欧亚人群的交流,产生特殊的新疆人群。现代人群的DNA数据揭示,新疆人群是欧亚混合人群。古DNA研究也证明在很早以前(大约3800年前),新疆的人群就是混合人群[2]。目前新疆约2000年前古代人群研究揭示这些人群的线粒体DNA包含东亚单倍群,如单倍型A、B、D、M等;也包含欧洲单倍群,如单倍型H、J、K、U等。有趣的是,虽然现代和古代的新疆人群的面貌特征都更接近欧洲人,但DNA揭示这些古代人群的东亚遗传成分更多。此外,结合新疆周边的数据,我们可以发现,中亚不同遗址的古代人群,东亚成分自东向西逐渐减少;相应的,欧洲成分逐渐增多。综上所述,从混合时间上看,早在3800年前在新疆已经发生了欧亚人群的混合;从人群的遗传结构上看,大多数现有的2000年前的新疆古代人群中东亚遗传成分多于欧洲成分[3]。
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