【摘要】 应用线粒体COⅡ基因的部分序列,分析了中国不同地理群体翘嘴鲌Culter alburnus的遗传多样性。结果表明:中国翘嘴鲌各群体的核苷酸多样性为0~0.00444,核苷酸差异度为0.00085~0.00454;6个群体的36个个体中共检测到6种单倍型,单倍型多样性为0.6048。AMOVA分析显示,42.58%的遗传变异来自群体间,而57.42%的遗传变异来自群体内(P<0.01)。36个个体的MP和NJ系统树明显地分为两大分支,即兴凯湖、南湾和太湖群体为一支;三溪口、浮桥河和梁子湖群体为另一支。分析结果表明,应用COⅡ基因仅可以把中国的翘嘴鲌进行大致的区域划分,但尚不能作为群体之间鉴别的分子标记。更多还原

【Abstract】 The genetic diversity and structure of six populations of topmouth culter Culter alburnus were investigated by mitochondrial COⅡ sequences.The results showed that the nucleotide polymorphism index of the topmouth culter ranged from 0 to 0.00444.There were six haplotypes in the six populations with diversity index of 0.6048.The population pairwise genetic divergence values changed from 0.00085 to 0.00454.The molecular variance within and among the populations of the topmouth culter was 57.42%,and 42.58%.Thirty-six samples were divided into two major distinct clusters,one including Xingkaihu,Nanwan and Taihu populations,and the other including Sanxikou,Fuqiaohe and Liangzihu populations.This study revealed that COⅡ gene of mtDNA was unsuitable to be used as molecular marker for related studies for the analyses of population genetics,and only identified topmouth culter from relative large areas.更多还原