【摘要】 以闽香鳢及其亲本乌鳢和斑鳢为材料,取头肾做3种鱼的染色体组型图,发现闽香鳢染色体数为45,是亲本配子染色体数之和;通过染色体组型分析发现闽香鳢的染色体组型公式为2n=3m+6sm+36st,t,臂数NF=54,个别染色体可分辩出其来源。研究表明,闽香鳢遗传了其父本、母本各一套的染色体(n),是斑鳢与乌鳢的杂交种;染色体数和闽香鳢1号特异染色体可做为闽香鳢的鉴定指标。随机取样发现子一代闽香鳢存在性腺发育Ⅲ期以上的雌性个体,而未发现有性腺成熟的雄性个体,可能存在雄性不育。更多还原

【Abstract】 <Abstrcat>According to karyotype diagram of the first filial generation (Channa meculorta♀×C. argus♂) and their parents, the number of chromosomes in the first filial generation (called Minxiangli) is 45, which is equal to the sum of those in their parents gametid. Karyotype analysis turns out that the formula for karyotype of Minxiangli is 2n=3m+6sm+36st,t, NF=54, and that several chromosomes could be distinguished their origin. Therefore, it concludes that Minxiangli respectively inherits a suit of chromosomes from their parents, which is the hybrid of C. argus and C. meculorta, and that the number of chromosomes and the No.1 special chromosome of Minxiangli could become identification indexes of Minxiangli. In addition, it is found by random sample that there are female individuals in the first filial generation whose sex gland growth is beyond the third period, but no male individuals whose sex gland is mature. It may be deduced that the male individuals are sterile in the first filial generation.更多还原