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湖泊科学  2011 

四个鲤鱼种群ITS-1序列的遗传变异分析

DOI: 10.18307/2011.0217

Keywords: 鲤鱼,内转录间隔区1(ITS-1),种质资源,遗传变异

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Abstract:

我国四个鲤鱼种群的核糖体DNA内转录间隔区ITS-1进行了PCR扩增、测序.序列分析显示,370bp的ITS—l序列中GC含量明显高于AT含量,共检测到34个变异位点,96个样本得到14个单倍型,平均单倍型多样性为0.637±0.055,核苷酸多样性为0.00857±0.00200,遗传多样性表现较低.黑龙江野鲤种群与建鲤种群问遗传距离最远,为0.10129,黑龙江野鲤种群与黄河鲤种群间遗传距离最近,为0.02305.分子方差分析(AMOVA)表明,群体间遗传分化系数Fst为0.05373,几乎所有变异都来自群体内,群体间遗传分化极小.ITS-1序列构建系统进化树显示,四个种群分为南北2支,黑龙江野鲤和黄河鲤种群聚为北方支,建鲤和荷包红鲤种群聚为南方一支。

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