西镇牛的染色体研究  

Study on chromosomes of Xizhen Cattle

作　　者：陈宏[1] 邱怀[1] 刘成玉 张国亮 

机构地区：[1]西北农业大学畜牧系,陕西杨陵712100 [2]陕西省西乡县畜牧局西镇牛良种繁殖场

出　　处：《黄牛杂志》1996年第2期16-19,9,共5页Journal of Yellow Cattle Science

摘　　要：对21头西镇牛（9♂，12♀）的染色体核型、G带、C带及Ag－NORs进行了研究。结果表明，西镇牛公牛的核型为60，xy，母牛为60，xx。Y染色体为近端着丝点染色体。西镇牛的核型、G带和C带特征与病牛一致．认为西镇牛为瘤牛型黄牛。统计了1839个细胞的Ag－NORs数目，每细胞Ag－NORs数变化范围为2～10个，平均为5．178±0．354。The karyotypes, G-band, C-band and Ag-NORs of 21 Xizhen cattle (9 male and 12 female) were studied. Result showed that karyotype of bull and cow was 60, xy and 60,xx respectively with acrocentric Y chrornosome, The characters of karyotypes, G - band and C - band was the same as that of Bos indicus ,it was concluded that Xizhen cattle is a Bos taurus with Bos indicus type. Ag - NORs number per cell varied from 2 to 10 with the mean of 5. 178±0. 354 by counting a sample of 1839 cells.

关 键 词：梁色体 银梁核仁组织区 西镇牛 牛 

分 类 号：S823.2[农业科学—畜牧学]