Population phylogenomic analysis and origin of mitochondrial DNA in Chinese domestic pig

Abstract

The genetic diversity of eight domestic pigs was analyzed using a hypervariable fragment in the mitochondrial (mt) DNA control region; a portion of the hypervariable control region (515 bp) was sequenced from 153 samples. Haplotype diversity and nucleotide diversity in Yushan black pig populations were significantly higher than other populations (p < 0.01). A neighbor-joining tree was constructed from domestic pig mtDNA and five wild pigs. The results indicate that there are only small differences among individual pigs from different regions. Networks of the domestic pigs were constructed to better visualize the relationships between sequences. Each core haplotype was surrounded by a star-like pattern, consistent with recent population expansion.

• Chinese domestic pig
• mitochondrial DNA
• origin
• phylogenomic analysis

Declaration of interest

This study was supported in part by grants from the Jiangxi Science and Technology Support Program (No. 20123BBF60189), the National Infrastructure of Animal Germplasm Resources, NIAGR, Agriculture Science and Technology Achievement Transformation Funds (2012GB2C500226). The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.