毛冠鹿种内异染色质变化与染色体多态

采用原代和传代培养方法对8头毛冠鹿(Elaphodus cephalophus)的皮肤细胞进行了染色体研究,发现了一种核型与以前所报道的几种核型不一致,确定为一新核型。在该核型中,染色体众数2n=47,2条X染色体异型,一条为端着丝粒,另一条为近端着丝粒。C-带显示该核型中异染色质除了分布在2条X染色体长臂中之外,在第一对大的端着丝粒染色体中的一条近着丝粒区出现一异染色质“柄”。结合C-带及薄层扫描结果对毛冠鹿种内常染色体、性染色体中异染色质的含量和分布与染色体多态的关系进行了探讨。

Variation of Heterochromatin and Chromosome Polymorphism in the Tufted Deer

Chromosomal analysis of skin cells from 8 Tufted Deer(Elaphodus cephalophus) was conducted by using primary culture and subculture.A new karyotype,different from the previously reported karyotype,was found.There were 47 chromosomes in somatic cells,including a pair of heteromorphic X chromosomes,one was telocentric and the other was subtelocentric.C-banding revealed that besides the two long arms of the X chromosomes the heterochromatin also displayed in the area near the centric region of one of the first telocentric chromosome,looking like an "arm".We also studied the relationship between the quantity and display of heterochromatin in the Tufted Deer's autosomes and sex chromosomes and the chromosome polymorphism according to the results of C-banding and thin layer scanning.