遗传 ›› 2001, Vol. 23 ›› Issue (6): 526-298.
陈宏1;徐廷生2;雷初朝1;雷雪芹2 CHEN Hong1;XU Ting-sheng2;LEI Chu-zhao1;LEI Xue-qin2
摘要: 用银染技术对中国4个黄牛品种(蒙古牛、秦川牛、岭南牛和西镇牛)40头牛的Ag-NOR联合的类型和频率进行了分析.结果表明,黄牛每个体细胞Ag-NOR联合可出现一个、两个或多个;蒙古牛、秦川牛、岭南牛和西镇牛Ag-NOR联合的频率分别为0.135、0.149、0.146和0.153.其中有一个联合的细胞占总的有联合细胞的比率分别为0.802、0.891、0.861和0.871.牛Ag-NOR联合的类型可分为链状联合,对称联合,环状联合和堆集联合4种,其中链状联合占60%~70%以上,对称联合占20%~30%.后两种占5%~10%.经分析表明,Ag-N(R联合的类型和频率可能具有种族特征,而不存在品种差异。
Abstract:The type and frequency of Ag-NORs combination of 40 individuals of four native cattle breeds(Mongolian,Qinchuan,Lingnan and Xizhen cattle)in China were analyzed by silver staining technique.The results showed that one,two or more Ag-NORs combinations appeared in metaphase cells of the cattle.The aerage freuency of Ag-NORs combination in each metaphase cell of Mongolian,Qinchuan,Lingnan and Xizhen cattle breeds was 0.135,0.149,0.146 and 0.153 respectively.Four types of Ag-NORs combination:cateniform with frquency 60%~70%,symmetry with 20%~30%,circularity and pile with 5%~10% were observed.The analysis showed that the type and frequency of Ag-NORs combination could perhaps be species characteristics and not breed characteristics.~