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三峡库区5个鲢群体遗传变异的微卫星分析
Authors
俞小牧
庞美霞
童金苟
Publication date
1 January 2015
Publisher
Abstract
研究利用10个高度多态的微卫星标记对三峡水库秭归、巫山、云阳、忠县、木洞等5个库区鲢(Hypophthalmichthys molitrix)的野生群体进行了遗传多样性分析。检测到161个等位基因,群体共有等位基因84个,每个微卫星位点的等位基因数7—29不等。平均观测杂合度Ho为0.784—0.846,平均期望杂合度He为0.828—0.847,平均多态信息含量PIC为0.797—0.817。Fst值为–0.001—0.009,表明5个鲢群体间没有遗传分化。Hardy-Weinberg平衡检验表明巫山、云阳、木洞群体在一些位点上偏离遗传平衡。Bottleneck分析显示长江三峡库区江段的鲢群体可能在历史上经历了遗传瓶颈。5个群体间的遗传相似系数为0.891—0.950,遗传距离为0.050—0.115,根据Nei’s遗传距离所绘制的聚类图,表明鲢群体间的遗传距离与其地理距离基本一致。贝叶斯分析结果也证实三峡库区5个鲢群体可视为一个类群。尽管没有检测到遗传分化,数据清晰地表明三峡库区的鲢群体仍有很高的遗传多样性,研究结果为三峡地区和长江上游的鲢种质资源保护和种群评估提供了参考
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Institute of Hydrobiology, Chinese Academy Of Sciences
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oai:ir.ihb.ac.cn:342005/37318
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Institute of Hydrobiology, Chinese Academy Of Sciences
See this paper in CORE
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oai:ir.ihb.ac.cn:342005/41101
Last time updated on 23/01/2021
Institute of Hydrobiology, Chinese Academy Of Sciences
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ir.ihb.ac.cn:342005/37320
Last time updated on 25/11/2020