数字农科院2.0

Phylogeography And Phylogenetic Evolution In Tibetan Sheep Based Onmt-Cybsequences

文献类型： 外文期刊

作者： Liu, JB; Lu, ZK; Yuan, C; Wang, F; Yang, BH

作者机构：

关键词： Tibetan Sheep; Mt-Cyb; Phylogeography; Maternal Lineage

期刊名称： ANIMALS

ISSN： 2076-2615

年卷期： 2020 年 10 卷 7 期

页码：

收录情况： JCR（2021版）

摘要： Simple Summary The molecular and population genetic evidence of the phylogenetic status of the Tibetan sheep (Ovis aries) is not well understood, and little is known about this species' genetic diversity. The aim of the present research was to explore phylogeography and phylogenetic evolution of Tibetan sheep populations, on the basis of mitochondrial DNA (mtDNA) geneMT-CYB(1140 base pairs). The results of this study will add information to the Tibetan sheep populations and help enlighten upcoming programs related to conservation of Tibetan sheep living in the Qinghai-Tibetan Plateau. To date, molecular genetics and population studies in Tibetan sheep (Ovis aries) have been limited, and little is known about the phylogenetic evolution and phylogeography of Tibetan sheep populations. The aim of the present research was to explore phylogeography and phylogenetic evolution of Tibetan sheep populations, on the basis of mitochondrial DNA (mtDNA) geneMT-CYB(1140 base pairs). Our dataset consisted of 641MT-CYBsequences from the same amount of animals belonging to 15 populations of Tibetan sheep living in the Qinghai-Tibetan Plateau, China. Haplotype and nucleotide diversities were 0.748 +/- 0.010 and 0.003 +/- 0.001, respectively. The analysis of phylogeography revealed the presence of two formerly described haplogroups in 15 populations of Tibetan sheep, however only one haplogroup was present in Awang sheep. Moreover, 641 Tibetan sheep were distributed into a minimum of two clusters by clustering analysis. The 15 Tibetan sheep populations and 19 reference populations of 878 individuals were separated into six main groups based on their substitutions per site, from which we constructed a phylogenetic tree. Minor differences in branching order of various taxa between trees acquired from either gene were observed. This study provides insights on the origins and phylogenetic evolution of populations residing in the Qinghai-Tibetan Plateau, which will aid information of future conservation programs aimed at conserving this valuable genetic resource.

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