The origin of Chinese domestic horses revealed with novel mtDNA variants
The origin of Chinese domestic horses revealed with novel mtDNA variants
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DOI：
10.1111/asj.12583
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发表时间：
2017-01-01
影响因子：
2
通讯作者：
Wu, Changxin
中科院分区：
文献类型：
--
作者：
Yang, Yunzhou;Zhu, Qiyun;Wu, Changxin
中国马的起源一直是一个有争议的问题，有几种假说，包括本土驯化，从其他地区引进，以及引进和当地野马渐渗的多源性，但都没有得到DNA数据的充分支持。本研究对714匹中国地方马的线粒体DNA（mtDNA）序列进行了分析。结果表明，中国家马中存在一些新的mtDNA单倍群，可能发生了地方驯化事件，但它们不是优势单倍群，新的mtDNA单倍群的地理分布受到一定的限制。因此，我们的研究结果支持了中国家马起源于中国以外的马匹和当地野马渐渗到国内群体的假设。遗传多样性分析结果表明，中国引进的马可能是从欧亚草原经北方传入的。
The origin of domestic horses in China was a controversial issue and several hypotheses including autochthonous domestication, introduction from other areas, and multiple-origins from both introduction and local wild horse introgression have been proposed, but none of them have been fully supported by DNA data. In the present study, mitochondrial DNA (mtDNA) sequences of 714 Chinese indigenous horses were analyzed. The results showed that Chinese domestic horses harbor some novel mtDNA haplogroups and suggested that local domestication events may have occurred, but they are not the dominant haplogroups and the geographical distributions of the novel mtDNA haplogroups were rather restricted. Conclusively, our results support the hypothesis that the domestic horses in China originated from both the introduced horses from outside of China and the local wild horses' introgression into the domestic populations. Results of genetic diversity analysis suggested a possibility that the introduced horses entered China through northern regions from the Eurasian steppe.