Cai Xin, Chen Hong, Wang Shan, Xue Kai, Lei Chuzhao
College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Agricultural Molecular Biology, Yangling, Shaanxi 712100, China.
Genet Sel Evol. 2006 Sep-Oct;38(5):525-34. doi: 10.1186/1297-9686-38-5-525. Epub 2006 Sep 6.
Two Y chromosome specific microsatellites UMN2404 and UMN0103 were genotyped and assessed for polymorphisms in a total of 423 unrelated males from 25 indigenous Chinese cattle breeds. Consistently, both microsatellites displayed specific indicine and taurine alleles in each bull examined. The indicine and taurine alleles were detected in 248 males (58.6%), and 175 males (41.4%), respectively, although these frequencies varied amongst different breeds examined. The indicine alleles dominated in the southern group (92.4%), while the taurine alleles dominated in the northern group (95.5%). Hainan Island was possibly the site for the origin of Chinese zebu, and Tibetan cattle were probably independently domesticated from another strain of Bos primigenius. The geographical distribution of these frequencies reveals a pattern of male indicine introgression and a hybrid zone of indicine and taurine cattle in China. The declining south-to-north and east-to-west gradient of male indicine introgression in China could be explained by historical data, geographical segregation and temperature and weather conditions.
对来自25个中国本土牛品种的423头无亲缘关系的雄性个体进行了两个Y染色体特异性微卫星UMN2404和UMN0103的基因分型，并评估了其多态性。在每头被检测的公牛中，这两个微卫星均一致地显示出特定的瘤牛和普通牛等位基因。瘤牛和普通牛等位基因分别在248头雄性个体（58.6%）和175头雄性个体（41.4%）中被检测到，尽管这些频率在不同的被检测品种中有所不同。瘤牛等位基因在南方群体中占主导（92.4%），而普通牛等位基因在北方群体中占主导（95.5%）。海南岛可能是中国瘤牛的起源地，而牦牛可能是从原牛的另一个品系独立驯化而来。这些频率的地理分布揭示了中国雄性瘤牛渐渗的模式以及瘤牛和普通牛的杂交区域。中国雄性瘤牛渐渗从南到北、从东到西递减的梯度可以通过历史数据、地理隔离以及温度和气候条件来解释。
