四川农业大学学报2026，Vol.44Issue(2)：484-490,7.DOI:10.16036/j.issn.1000-2650.202510676
基于线粒体cytb基因唇䱻3个地理种群的群体遗传多样性分析
Population Genetic Diversity Analysis of Three Geographical Populations of Hemibarbus labeo Based on Mitochondrial Gene cytb
摘要
Abstract
[Objective]This study aimed to investigate the genetic diversity and population genetic struc-ture of Hemibarbus labeo.[Method]Characterization of genetic variability and population subdivi-sion was performed based on mitochondrial cytochrome b(cytb)sequence data.Analyses of genetic diversity and population structure were conducted based on the mitochondrial cytochrome b(cytb)gene in three populations:the Jialing River(Wusheng County,GA,n=9),the Minjiang River(Leshan section,LS,n=21),and the Yangtze River(Luzhou section,LZ,n=18).[Result]A total of 11 haplotypes were identified from the 48 cytb sequences,with one haplotype shared across all populations.The GA and LS populations exhibited relatively low nucleotide diversity(0.001 72-0.025 09)but high haplotype diversity(0.805-0.833).In contrast,the LZ population exhibited the lowest values for both nucleotide diversity(0.000 10)and haplotype diversity(0.111).The genetic dis-tance was greatest between the GA and LS populations(D=0.026 09),while the genetic dis-tance between LZ and LS was the smallest(D=0.003 60).Analysis of molecular variance(AMOVA)and fixation index(Fst)demonstrate a preponderance of within-population component(64.89%)relative to the among-population fraction(35.11%).A detectable level of genetic dif-ferentiation was observed between GA and LS populations.[Conclusion]The H.labeo population from the mainstream Yangtze River(Luzhou section)demonstrates lower genetic diversity than popula-tions from the Jialing River(Wusheng)and Minjiang River(Leshan)tributaries.These findings high-light the need for targeted conservation efforts to protect the genetic resources of the LZ population.This study provides fundamental data to support the conservation of wild genetic resources in H.labeo.关键词
唇䱻/cytb基因/遗传多样性/种群结构Key words
Hemibarbus labeo/cytb gene/genetic diversity/population structure分类
生物科学引用本文复制引用
利广杰,严太明,陈鲆,何智,王翔,刘飞,罗文杰,唐子婷,张明旺,杨德英..基于线粒体cytb基因唇䱻3个地理种群的群体遗传多样性分析[J].四川农业大学学报,2026,44(2):484-490,7.基金项目
国家自然科学基金(31972777). （31972777）
