基于mtDNA Cytb基因和D-loop区序列的陕西林麝遗传多样性分析

doi:10.16431/j.cnki.1671-7236.2022.04.017

Abstract

Abstract: 【Objective】 This study was aimed to explore the genetic diversity of Shaanxi Moschus berezovskii population,and understand the genetic information of Moschus berezovskii.【Method】 The hair of Moschus berezovskii was collected to extract DNA,the mitochondrial DNA(mtDNA) cytochrome b(Cytb) gene and D-loop sequences of 43 Moschus berezovskii individuals were determined,and the base composition was counted.All sequences were integrated and compared using ClustalX 2.0 software to obtain nucleotide polymorphic sites (SNPs) in the population.The nucleotide diversity (Pi),number of haplotype (H),haplotype diversity (Hd) and average number of nucleotide differences (K) were calculated by DNASP 5.10 software.The genetic distance among different haplotypes of Cytb gene and D-loop sequences was calculated by Mega 7.0 software,and Neighbor-Joining (NJ) phylogenetic tree was constructed.【Result】 The AT content of Cytb gene and D-loop region were higher than GC content,indicating there was bias in base composition.There were 241 and 383 SNPs of Cytb gene and D-loop region,respectively.The nucleotide diversity of Cytb gene and D-loop region were 0.28343 and 0.07707,and the haplotype diversity was 0.983 and 0.975,respectively,indicating that the population genetic diversity was rich.The genetic distances of 35 haplotypes of Cytb gene ranged from 0.002 to 0.831,and 29 haplotypes of D-loop region ranged from 0.006 to 1.342.The phylogenetic tree showed that there were two mitochondrial lineages,indicating that there were two mitochondrial maternal origins.The evolutionary analysis of D-loop region also supported this conclusion.【Conclusion】 The nucleotide diversity and haplotype diversity of Moschus berezovskii population were high,and the genetic diversity was rich.At the same time further supported the view of Moschus berezovskii and Moshus moschiferus belonged to a branch of the view.

Key words: Moschus berezovskii; mtDNA; Cytb gene; D-loop region; genetic diversity

CLC Number:

S813.3

LIU Xiaowei, LI Ruixiang, WANG Xinglong, LI Xiao. Genetic Diversity Analysis of Shaanxi Moschus berezovskii Based on mtDNA Cytb Gene and D-loop Region Sequence[J]. China Animal Husbandry and Veterinary Medicine, 2022, 49(4): 1352-1363.

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Genetic Diversity Analysis of Shaanxi Moschus berezovskii Based on mtDNA Cytb Gene and D-loop Region Sequence

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