Genetic diversity of mitochondrial genome and evolutional origin of six Vietnamese indigenous pig breeds

Abstract

The phylogenetic trees of 33 domestic and wild boar pig breeds of Asian and European clades, including six Vietnamese indigenous pig breeds were reconstructed from D-loop region and coding region sequence using the Bayesian inference method. It is the first time the complete mitochondrial genome of the I, Mong Cai, Muong Khuong, Muong Lay, Huong, and Ha Lang pig breeds was sequenced and deposited on GenBank (ac-cession numbers: KX094894, KU556691, KY432578, KX147101, KY964306, and KY800118, respectively). The genetic distances and phylogenetic relationships, based on both the mtDNA and the D-loop region, re-vealed that all of six Vietnamese pig breeds belonged to Asian clade with the close evolutionary relationship to other pig breeds from South China and Chinese Yellow River Valley. The publication of the mitochondrial ge-nome sequences will make an important contribution to elucidating the relationship among Vietnamese indige-nous pig breeds and supporting the selection of suitable ones for pig breeding in the area.