【作者】 朱华平； 卢迈新； 黄樟翰； 高风英； 陈昆慈；

【Author】 ZHU Hua-ping,LU Mai-Xin,HUANG Zhang-Han,GAO Feng-Ying,Chen kun-ci (Pearl River Fisheries Research Institute,CAFS,Guangzhou 510380,China)

【机构】 中国水产科学研究院珠江水产研究所；

【摘要】 本文采用体腔注射PHA-空气干燥法对橙色莫桑比克罗非鱼和荷那龙罗非鱼染色体数量、形态和核型进行了分析和比较。两种罗非鱼的二倍体染色体数目均为2n=44,都具有1对特大的染色体,未发现中部着丝粒染色体对和异型染色体。两种罗非鱼的染色体组型形态基本相似,它们的核型公式为2n=44,6sm+24st+14t,NF=50,用常规染色体染色的方法难以区分。研究结果显示,这两种罗非鱼的常规核型差异不显著,在分类地位上非常接近。更多还原

【Abstract】 Chromosome numbers,forms and karyotype of Mozambique tilapia(Oreochromis mossambicus orenge) and Zanzibar tilapia(O.homorum) were analyzed and compared by using PHA-injection air drying method.Two species of Tilapia have a diploid chromosome number of 44,and both had a large and long chromosome pairs.No metacentric chromosome pairs and heteromorphic chromosomes were found.The two fishes had similar karyotype and the conventional karyotype formula is 2n=44,6sm+24st+14t,NF=50.It was difficult to distinguish the karyotype of these two tilapia species by the conventional technique.The result showed that the difference of karyotype between these two tilapia species was not significance, which indicated that they were quite close to each other in terms of classification status.更多还原