中国畜牧兽医2017，Vol.44Issue(8)：2360-2368,9.DOI:10.16431/j.cnki.1671-7236.2017.08.021
中国地方猪种线粒体基因组遗传多样性及其系统发育分析
Genetic Diversity and Phylogenetic Relationships of the Complete Mitochondrial Genome in Chinese Indigenous Pig Breeds
摘要
Abstract
In order to explore the genetic diversity and the classification status of the Chinese domestic pigs at the molecular level,the complete mitochondrial DNA(mtDNA)genomic sequences of 22 Chinese indigenous pig breeds from 6 types were downloaded from GenBank for the analysis using the bioinformatics method.The polymorphism of nucleic acid sequences was analyzed,the molecular phylogenetic tree based on D-loop sequences,Cytb gene,complete coding region mtDNA sequences and the Median-Joining network of the mtDNA D-loop haplotypes were constructed for 22 pig breeds from 6 types.The results showed that a total of 144 mutation sites among 22 pig breeds were detected,22 haplotypes were discovered,which indicated that Chinese indigenous pig breeds had abundant genetic diversity.According to the complete mtDNA genomic sequences analysis,which suggested that the main mutations was transition,the transition/transversion ratio was greater than 2.0 and all mutations were in line with the neutral mutation.Our findings clearly demonstrated that there was a near genetic distance among 6 types,meanwhile,the shared haplotypes were found.The phylogenetic tree showed that Chinese indigenous pigs from 6 types were diverged from two ancestors.The results indicated that mtDNA D-loop and Cytb gene might serve as molecular markers for phylogenesis,origin and evolution.关键词
中国地方猪/线粒体DNA/遗传多样性/系统进化Key words
Chinese indigenous pigs/mitochondrial DNA/genetic diversity/phylogenetic evolution分类
农业科技引用本文复制引用
胡慧艳,贾青,刘津,侯胜奎,赵思思,张伟峰..中国地方猪种线粒体基因组遗传多样性及其系统发育分析[J].中国畜牧兽医,2017,44(8):2360-2368,9.基金项目
河北省现代农业产业技术体系专项(HBCT2013070202) （HBCT2013070202）
