文献类型： 外文期刊
作者： Diao, Shuqi 1 ; Huang, Shuwen 1 ; Xu, Zhiting 1 ; Ye, Shaopan 1 ; Yuan, Xiaolong 1 ; Chen, Zanmou 1 ; Zhang, Hao 1 ; Zhan 1 ;
作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Agroanim Genom & Mol Breed, Natl Engn Res Ctr Breeding Swine Ind, Coll Anim Sci, Guangzhou 510642, Guangdong, Peoples R China
关键词： Ne; genetic diversity; LD; population structure; selection signatures; South China indigenous pigs
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 6 期
页码：
收录情况： SCI
摘要： Simple Summary The pig is one of the most important livestock animals, providing the majority of protein for humans. The population genetics analysis of pigs not only helps humans understand the domestication of the pig but also helps breeders in the genetic improvement of pigs. In this study, the population genetics of 11 pig breeds of South China were analyzed with the help of single nucleotide polymorphism (SNP) chips. The results showed that the genetic diversity of South China indigenous pigs is declining rapidly, and gene introgression from commercial pigs to indigenous pigs was detected. Selection signature analysis showed differences among South China indigenous pig breeds, commercial pig breeds, and wild pig breeds were present for meat quality and growth. Our study deepened understanding of the conservation status and selection mechanisms of Chinese indigenous pigs. Abstract To investigate the genetic diversity, population structure, extent of linkage disequilibrium (LD), effective population size (Ne), and selection signatures in indigenous pigs from Guangdong and Guangxi in China, 226 pigs belonging to ten diverse populations were genotyped using single nucleotide polymorphism (SNP) chips. The genetic divergence between Chinese and Western pigs was determined based on the SNP chip data. Low genetic diversity of Dahuabai (DHB), Luchuan (LC), Lantang (LT), and Meihua (MH) pigs, and introgression of Western pigs into Longlin (LL), MH, and Yuedonghei (YDH) pigs were detected. Analysis of the extent of LD showed that indigenous pigs had low LD when pairwise SNP distance was short and high LD when pairwise SNP distance was long. Effective population size analysis showed a rapid decrease for Chinese indigenous pigs, and some pig populations had a relatively small Ne. This result indicated the loss of genetic diversity in indigenous pigs, and introgression from Western commercial pigs. Selection signatures detected in this study overlapped with meat quality traits, such as drip loss, intramuscular fat content, meat color b*, and average backfat thickness. Our study deepened understanding of the conservation status and domestication of Chinese indigenous pigs.
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