Complete mitochondrial genome sequence of Chenghua pig (Sus Scrofa) and its phylogenetic analysis

Chenghua pig is one of the famous indigenous breeds of Sichuan province in China. In the study, the complete mitochondrial genome of Chenghua pig was first determined. The total mitochondrial genome is 16,760 bp in length and its overall base composition of the circle genome is A (34.71%), T (25.79%), C (26.20%) and G (13.30%), respectively, indicating an A–T (60.50%)-rich feature. It contains the typical structure, including 22 transfer RNA genes, 13 protein-coding genes, 2 ribosomal RNA genes and a major non-coding control region (D-Loop region). The D-loop region contains two different repeat motifs. According to the phylogenetic tree, we can infer that it is reasonable to divide Chenghua pig into the genus Sus Scrofa in southwest China. The mitochondrial genome would play an important role in population genetics and phylogenetic analysis of Sus Scrofa.