广东鲂(“非汉字符号”)×团头鲂(“非汉字符号”)杂交子一代及其双亲染色体组型的分析  

Comparison of karyotypes of the F_1 hybrid (Megalobramahoffmanni “非汉字符号”×M. amblycephala “非汉字符号”with its parents

作　　者：叶 星[1] 谢 刚[1] 祁宝伦[1] 潘德博[1] 许淑英[1] 庞世勋[1] 

机构地区：[1]中国水产科学研究院珠江水产研究所农业部热带亚热带鱼类选育与养殖重点开放实验室,广州510380

出　　处：《大连水产学院学报》2002年第2期102-107,共6页Journal of Dalian Fisheries University

基　　金：广东省重点科技攻关项目(962203608)

摘　　要：采用活体肾细胞直接制片法制作了广东鲂(Megalobrama hoffmanni)(?)和团头鲂(Megalobrama amblycephala)(?)及其杂交子一代的染色体。广东鲂、团头鲂和其杂交子一代的染色体数目均为 2n＝48,最大的染色体对均在 SM组。广东鲂的染色体组型为26m＋18sm＋4st,总臂数NF＝92;团头鲂的染色体组型为26m＋22sm,总臂数NF=96;杂交子一代的染色体组型及总臂数与母本广东鲂的相同。广东鲂和团头鲂的染色体组型较相似,从细胞遗传学的角度解释了广东鲂与团头鲂杂交成功、杂种后代可育的原因。Karyotypes of the F1 hybrid (M. hoffmanni ×M. amblycephala ) and its paren-tal fishes were examined using the chromosomes prepared from kidney cell by air - drying meth-od. The diploid chromosome numbers of these three fishes are all 50, the largest chromosomesof which are all in the group of submetacentric chromosome. The karyotype of maternal fish(M. amblycephala) is composed of 13 metacentric chromosome pairs, 9 submetacentric chro-mosome pairs and 2 subtelocentric chromosome pairs, which can be expressed as 26m + 18sm+ 4st. Its fundamental arm numbers ( NF) are 92. The karyotype of its paternal fish is 26m +22sm and its NF are 96. The karyotype and NF of the hybrid fish are the same as the maternalfish. The karyotypes of the parental fishes are very alike which is the cytogenetic basis for thesuccess of the hybrid experiment and fertileness of the hybrids.

关 键 词：广东鲂 团头鲂 杂交子一代 染色体组型 亲本 

分 类 号：Q959.468[生物学—动物学]