Genetic diversity and classification of Tibetan yak populations based on the mtDNA COIII gene

文献类型: 外文期刊

第一作者: Song, Q. Q.

作者: Song, Q. Q.;Chai, Z. X.;Zhao, S. J.;Zhong, J. C.;Song, Q. Q.;Chai, Z. X.;Zhao, S. J.;Zhong, J. C.;Xin, J. W.;Ji, Q. M.;Zhang, C. F.;Ma, Z. J.

作者机构:

关键词: Mitochondrial DNA cytochrome c oxidase subunit 3;Genetic diversity;Phylogenetic relationship;Tibetan yak

期刊名称:GENETICS AND MOLECULAR RESEARCH ( 影响因子:0.764; 五年影响因子:0.912 )

ISSN: 1676-5680

年卷期: 2015 年 14 卷 1 期

页码:

收录情况: SCI

摘要: To determine the level of genetic diversity and phylogenetic relationships among Tibetan yak populations, the mitochondrial DNA cytochrome c oxidase subunit 3 (COIII) genes of 378 yak individuals from 16 populations were analyzed in this study. The results showed that the length of cytochrome c oxidase subunit 3 gene sequences was 781 bp, with nucleotide frequencies of 29.2, 29.4, 26.1, and 15.2% for T, C, A, and G, respectively. A total of 26 haplotypes were identified, with 69 polymorphic sites, including 11 parsimony-informative sites and 58 single-nucleotide polymorphism sites. No deletions/insertions were found in sequence comparison, indicating that nucleotide mutation types were transitions and transversions. Haplotype and nucleotide diversities were 0.562 and 0.00138, respectively, indicating a high level of genetic diversity in Tibetan yak populations. Phylogenetic relationship analysis indicated that Tibetan yak populations are divided into 2 groups.

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