毛蚶、泥蚶、橄榄蚶的核型比较分析  

Comparison on the karyotypes of Scapharca subcrenata,Tegillarca granosa and Estellarca olivacea

作　　者：陆荣茂[1] 林志华[1] 张永普[2] 柴雪良[1] 董迎辉[1] 肖国强[1] 张炯明[1] 方军[1] 胡利华[1] 

机构地区：[1]浙江省海洋水产养殖研究所,浙江温州325005 [2]温州大学生命与环境科学学院,浙江温州325027

出　　处：《上海水产大学学报》2008年第5期625-629,共5页Journal of Shanghai Fisheries University

基　　金：国家科技基础条件平台建设项目(2005DKA30470-015);浙江省科技计划项目(2006C22010)

摘　　要：以毛蚶、泥蚶、橄榄蚶担轮幼虫为材料,采用热滴片法,进行染色体制备和核型分析,结果表明:毛蚶、泥蚶、橄榄蚶的二倍体染色体数目都为2N=38,核型公式分别为20m+12sm+6st,22m+12sm+4st,18m+18sm+2st,染色体臂数(NF)分别为70,72,74,未发现性染色体和随体。从三种蚶核型不对称性的比较推测泥蚶进化程度最高,类平均法聚类分析的结果显示橄榄蚶的进化程度在泥蚶和毛蚶之间,并在亲缘关系上更接近于毛蚶。The karyotypes of diploid Scapharca subcrenata, Tegillarca granosa and EsteUarca olivacea were studied in trochophores by means of hot-dropping method and could be described by 20m ＋ 12sm ＋ 6st with NF =70, 22m ＋ 12sm ＋ 4st with NF ： 72 and 18m ＋ 18sm ＋ 2st with NF = 74, respectively. The diploid chromosome numbers were all 2n = 38 . The sex chromosomes and the satellites were not found. It was considered that Tegillarca granosa was more advanced than the other two species by the method of comparision on dissymmetry. The clustering analysis was made by group mean method, the result showed that the evolutionary degree of Estellarca olivacea lay between Scapharca subcrenata and Tegillarca granosa and the specific relationship of Estellarca olivacea and Scapharca subcrenata was more closer.

关 键 词：毛蚶 泥蚶 橄榄蚶 核型 

分 类 号：S917[农业科学—水产科学]