| 基于线粒体控制区全序列的长江中下游鳊的遗传多样性研究 |
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| 引用本文： | 杨凡,彭博,赵爽,章群.基于线粒体控制区全序列的长江中下游鳊的遗传多样性研究[J].广东农业科学,2010,37(3):173-175,181. |
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| 作者姓名： | 杨凡 彭博 赵爽 章群 |
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| 作者单位： | 暨南大学水生生物研究所,广东,广州,510632 |
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| 基金项目： | 国家自然科学基金(30770415) |
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| 摘 要： | 测定了湖南岳阳、江西都昌、上海崇明3个群体42尾鳊线粒体控制区全序列940bp,发现26个变异位点和15个简约信息位点,共检出28个单倍型。转换/颠换比为45.8。在邻接树上,来自不同地点的鳊混杂分布于各分支,没有出现明显的谱系结构和地理聚群。3个群体间的遗传距离为0.004～0.005,Fst值为0～0.05,表明3个群体间没有显著遗传分化,隶属同一种群。岳阳、都昌和崇明群体的核苷酸多样性分别为0.00501、0.00414、0.00409,单倍型多样性分别为1.00000、0.93407、0.97802,其中岳阳群体的核苷酸多态性与单倍型多样性在3个群体中最丰富,建议优先保护。
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| 关 键 词： | 鳊 线粒体控制区 遗传多样性 遗传结构 种群历史动态 |
Genetic diversity analysis of Parabramis pekinensis based on mitochondrial control region sequences in the middle-lower reaches of the Yangtze River |
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| YANG Fan,PENG Bo,ZHAO Shuang,ZHANG Qun.Genetic diversity analysis of Parabramis pekinensis based on mitochondrial control region sequences in the middle-lower reaches of the Yangtze River[J].Guangdong Agricultural Sciences,2010,37(3):173-175,181. |
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| Authors: | YANG Fan PENG Bo ZHAO Shuang ZHANG Qun |
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| Institution: | Institute of Hydrobiology;Jinan University;Guangzhou 510632;China |
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| Abstract: | complete sequences of the mitochondrial DNA control region (940 bp) of 42 Parabramis pekinensis from Yueyang(YY),Duchang(DC) and Chongming(CM) were directly sequenced , of which 26 variable sites and 15 parsimony-informative sites were detected in 28 haplotypes. The average ratio of transitions vs. transversions was 45.8. In the neighbor-joining tree individuals from various localities were intertwined without genealogical and geographic clusters. Genetic distances among 3 populations were 0.004～0.005, and Fst value were 0～0.05, indicating that all individuals from the 3 sites belonged to one single natural population. The nucleotide diversity of Yueyang,Duchang and Chongming population were 0.00501,0.00414 and 0.00409, respectively, and their haplotypic diversity were 1.00000,0.93407 and 0.97802, respectively. As Parabramis pekinensis in Yueyang were composed of the most abundant genetic diversity in the 3 sampled sites, Yueyang should be as priority conservation areas. |
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| Keywords: | Parabramis pekinensis mtDNA control region genetic diversity genetic structure Demographic history |
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