摘要
对长江中、下游湖北石首、江西九江、安徽芜湖三江段鲢、鳙、草鱼、青鱼天然群体共３６５尾鱼的线粒体ＤＮＡ（ｍｔＤＮＡ）的ＮＤ５／６、Ｃｙｔｂ基因和ＤＬｏｏｐ区片段进行了限制性内切酶酶切片段长度多态（ＲＦＬＰ）分析。结果表明：（１）长江中、下游鲢、鳙和青鱼的遗传多样性丰富，草鱼不甚丰富。发现鲢、鳙和青鱼的ｍｔＤＮＡ基因型分别有２８、１９、２７种，草鱼ｍｔＤＮＡ基因型仅见７种；鲢、鳙和青鱼的基因型多样性指数为０６８１、０５８３、０８９０，草鱼的基因型多样性指数为０２３１。（２）鲢群体存在显著的遗传差异和基因型分布有明显的地域性；鳙群体也有显著差异，但基因型分布无区域性；青鱼群体有一些遗传差异，但基因型未见有区域分布；草鱼群体无显著差异，基因型分布亦无区域性。
Louis Bernatchez (Department of Biology, University Laval, Canada) RELP analysis of the mtDNA segment encompassing the ND5/6 and cytochromone b genes and D Loopregion was performed in Silver carp ( Hypophthalmichthys molitrix ), Bighead carp ( Aristichthys nobilis ), Grass carp ( Ctenopharyngodon idellus) and Black carp ( Mylopharyngodon piceus) from three sections (Shishou in Hubei Province, Jiujiang in Jiangxi Province, Wuhu in Anhui Province) along the middle and lower reaches of the Yangtze River. It was revealed that:(1) Silver carp, Bighead carp and Black carp showed a higher genetic diversity, whereas garss carp showed a lowergenetic diversity; The numbers of mtDNA haplotypes and the haplotype diversity indices for Silver carp, Bighead carp, Grass carp and Black carp were 28, 19, 27, 7 and 0 681, 0 583, 0 890 and 0 231 respectively. (2) The populations of Silver carp showed a significnat genetic diversity and a visible geographical distribution of genotypes; The populations of Bighead carp and Black carp had a significant genetic diversity but no visible geographical distribution of genotypes; The populations of Grass carp had neither significant genetic diversity nor visible geographical distribution of genotypes.
出处
《动物学报》
SCIE
CAS
CSCD
1998年第1期82-93,共12页
ACTA ZOOLOGICA SINICA
基金
加拿大国际发展研究中心(IDRC)资助
关键词
长江
鲢
鳙
草鱼
青鱼
DNA
多样性
线粒体
Yangtze River, Silver carp, Bighead carp, Grass carp, Black carp, mtDNA, RFLP, Diversity
