The total mitochondrial D-loop of yellow catfish from 5 fresh-water populations were sequenced.The result show that among 890 sites in total 151 were variable and 24 were parsimony-informative sites.72 haplotypes were detected from 143 individual.The average haplotype diversity index and nucleotide polymorphism index was 0.951±0.011 and 0.00614±0.00087,respectively.The analysis of genetic distance between 5 populations showed that genetic distance among 5 populations are small ranging 0.00427-0.00989.The genetic distance between Poyang Lake population and others were relatively larger for 0.00758-0.00989,while it was small between those of Guhu Lake and Chaohu Lake for 0.00427.The overall genetic differentiation index (Fst) of 5 populations was 0.0896 (P＜0.01),indicating that the intra-group variation was 91.04％ and intergroup was 8.96％.The gene flow coefficient (Nm) among 5 populations was 2.22,showing certain gene flow among 5 populations.%采用线粒体D-loop区测序技术,对巢湖、滆湖、洪泽湖、鄱阳湖和太湖5个地理群体的黄颡鱼(Pelteobagrus fulvidraco)遗传多样性及种群遗传结构进行了研究.结果表明,890个位点中变异位点有151个,简约信息位点24个.143个个体共检测到72个单倍型,平均单倍型多样性指数为0.951±0.011,核苷酸多样性为指数为0.00614±0.00087.鄱阳湖群体和其它4个湖泊群体的遗传距离相对比较大,滆湖和巢湖的遗传距离最小,总体遗传分化指数Fst为0.0896(P＜0.01).群体间基因流系数Nm=2.22,表明5个黄颡鱼种群间存在着一定的基因流动.
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