两种荔枝螺染色体核型以及性畸变个体染色体研究  

Studies on karyotype of two species of thais and variations of chromosome from imposex individual

作　　者：管云雁[1] 韩雅莉[1] 

机构地区：[1]汕头大学生物系,广东汕头515063

出　　处：《海洋环境科学》2004年第3期21-23,共3页Marine Environmental Science

基　　金：国家自然科学基金资助项目(30271033);广东省科技兴海重大项目资助(A200005F02)

摘　　要：首次报道2种荔枝螺的染色体核型,比较了正常疣荔枝螺和性畸变个体染色体的差异。结果表明:疣荔枝螺Thaisclavigera2n=24,其中11对为中央着丝粒染色体,1对为端部着丝粒染色体。黄口荔枝螺Thaisluteostoma2n=24,包括10对中央着丝粒染色体,1对亚中着丝粒染色体和1对端部着丝粒染色体;性畸变个体的染色体的形态有所改变,但数目没有变化。Karytypes of two species belonging to genera of Thais were studied and the difference of chromosomes between normal Thais clavigera and imposex individuals was compared. The results show that the dipyoid chromosome number of the two species is 2n=24。The chromosome from Thais clavigera consist of eleven pairs of metacentric and a pair of acrocentric one and that of Thais luteostoma's includes ten pairs of metacentric,one pair of submetacentric and one pair of acrocentric of chromosomes. The chromosome number of imposex from Thais clavigera hadn't any difference but their morphorlogy appeared some abnormal compared with normal invividuals.

关 键 词：染色体 核型 疣荔枝螺 黄口荔枝螺 

分 类 号：Q754[生物学—分子生物学] S968.3[农业科学—水产养殖]