阿什旦牦牛改良甘南牦牛效果分析

Analysis of the Effect of Ashdan Yak Improving Gannan Yak

为有效改善甘南牦牛品种退化和生产性能下降现状,本试验以阿什旦牦牛为父本改良甘南牦牛,从2021~2023年繁殖性能统计情况看,阿什旦牦牛改良甘南牦牛后代在同等饲养条件下,平均繁殖成活率较甘南牦牛提高3.64个百分点,死亡率降低3.85个百分点,阿什旦牦牛改良甘南牦牛表现出了较好的繁殖性能,无角性能稳定。阿什旦牦牛与甘南牦牛F_(1)代从初生就表现出了较突出的生长性能,18月龄阿甘F_(1)公母牛体重同比甘南牦牛平均提高11.24kg与10.73kg,增重11.17%与11.23%。改良后代生长发育快,体型结构好,产肉性能突出。

In order to effectively improve the degradation of Gannan yak breeds and the decline in production performance,this experiment used Ashdan yak as the male parent to improve Gannan yak.From 2021-2023,the reproductive performance statistics showed that under the same feeding conditions,the average reproductive survival rate of Ashdan yak improved Gannan yak offspring was 3.64 percentage points higher than that of Gannan yak,and the mortality rate was reduced by 3.85 percentage points.Ashdan yak improved Gannan yak,showing good reproductive performance and stable hornless performance.Ashdan yak and Gannan yak F1 generation have shown outstanding growth performance from birth.The weight of 18 month old Agan F1 male and female yaks has increased by an average of 11.24 kg and 10.73 kg compared to Gannan yaks,with a weight gain of 11.17% and 11.23%.The improved offspring have fast growth and development,good body structure,and outstanding meat production performance.