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利用微卫星分子标记分析长江、赣江和鄱阳湖鲢群体遗传结构

Journal of Huazhong Agricultural University(2016)

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Abstract
利用10个高度多态的微卫星标记对采自长江、赣江、鄱阳湖湖口和都昌水域的4个鲢野生群体遗传结构进行分析.检测到148个等位基因,每个微卫星位点的等位基因数5~24,有效等位基因数6.4~7.1,平均观测杂合度H.为0.802~0.821,平均期望杂合度He为0.817~0.839,表明这4个鲢群体遗传多样性较高.鲢群体间的遗传相似系数为0.922 2~0.944 1,遗传距离为0.057 6~0.081 0,固定系数Fst值为-0.012 35~0.005 28,表明这4个鲢群体间遗传一致性高,遗传距离小,群体遗传分化不显著.AMOVA结果显示遗传变异主要来自群体内,基因流分析认为长江、赣江、鄱阳湖鲢群体存在频繁的基因交流.
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Key words
silver carp (Hypophthalmichys molitrix),microsatellite,Ganjiang River,Yangtze River,Poyang Lake,genetic structure
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