【摘要】 本文介绍了用PHA体内注射法,以肾组织为材料,对胡子鲶染色体组型进行研究的结果。胡子鲶2N=56,中部着丝点染色体为9对,近中部着丝点染色体为12对,近端部和端部着丝点染色体为7对,染色体总臂数(NF)为98。在实验中还观察到第21对染色体在雌性个体为同型,而在雄性个体为异型,因而,这对形态明显异型的染色体的出现与性别有关,很可能是胡子鲶的性染色体,我们将其暂定为XY染色体,但要落实这对异型染色体确实是性染色体,还有待于进一步研究。更多还原

【Abstract】 The Karyotype of Claris fuscus has been determined from Kidney cell by the method of PHA pericardial Cavity injection in vivo. Slides were made by thehypotoic air drying technique with Giemse staining. The diploid number of Chromoso-mes is 56 (that is 2N=56). The total chromosome arm count is 98. They may be clas-sified into three groups: 9 pairs are metacentrie, 12 pairs submetacentric, and 7 pairssubtelo-or telocentric Chromosomes. The resulte are presented in table 1 and Fig 1. It was found that No. 21 was a pairs of homomorphic chromosomes in the fema-le, but it was a pair of heteromorphic chromosomes in the male, therefore the hetero-morphic chromosomes wore sex chrosmes of C. fuscus in all probabillity. They weret?ely designated as XY. The problem of the heteromorphic chromosomes inPisces was thus discussed, but whether the heteromorphic chromosomes were the sexchromosomes or not awaiting for further investigation.更多还原