Multiple Domestication Centers Revealed by the Geographical Distribution of Chinese Native Pigs

文献类型： 外文期刊

第一作者： Cai, Yuan

作者： Cai, Yuan;Quan, Jinqiang;Ge, Qianyun;Zhao, Shengguo;Gao, Caixia;Jiao, Ting;Guo, Yongbo;Zheng, Wangshan

作者机构：

关键词： pigs; mitochondrial DNA; phylogenetics; phylogeography

期刊名称：ANIMALS （ 影响因子：2.752； 五年影响因子：2.942 ）

ISSN： 2076-2615

年卷期： 2019 年 9 卷 10 期

页码：

收录情况： SCI

摘要： Simple Summary Phylogenetic analysis of Chinese native pigs was performed by screening for haplotypes inferred from a phylogenetic tree of pig mitochondrial DNA (mtDNA) sequences based on sequence-specific mutations. Our results suggest there are at least four domestication or expansion centers of Chinese native pigs, of which at least two domestication or expansion centers of Tibetan pigs are located in the Qinghai-Tibet Plateau and the intersection of the Hengduan Mountains (YSGH) of Yunnan, Sichuan, and Gansu provinces. The other two domestication or expansion centers are the Mekong River Basin in Yunnan Province and the middle and downstream regions of the Yangtze River. Abstract Previous studies have shown that Southeast Asian pigs were independently domesticated from local wild boars. However, the domestication of Chinese native pigs remains a subject of debate. In the present study, phylogenetic analysis of Chinese native pigs was performed by screening for haplotypes inferred from a phylogenetic tree of pig mitochondrial DNA (mtDNA) sequences based on sequence-specific mutations. A total of 2466 domestic pigs formed 124 haplotypes and were assigned to four clades. Clade A comprised pigs distributed mainly in the Qinghai-Tibet Plateau and its surrounding areas; these pigs clustered into three groups. The pigs of clade B were mainly from the Mekong River Basin in Yunnan Province and had been exposed to genetic infiltration from European populations. Clade C comprised pigs mainly from the middle and lower reaches of the Yangtze River. The pigs of clade D were distributed mainly at the intersection of Yunnan, Sichuan, and Gansu provinces east of the Hengduan Mountains (YSGH). Compared with wild boar, at least three domestication centers and one expansion center of pigs in China were detected. Among the four centers detected, two were for Tibetan pigs and were in the Qinghai-Tibet Plateau and at the YSGH intersection, and the other two were in the Mekong River Basin in Yunnan Province and the middle and downstream regions of the Yangtze River.

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