【摘要】 引进野牦牛冻精和野血牦牛,改良当地牦牛所生产的野血后代,均表现出明显的杂种优势。文章以野牦牛和家牦牛杂交后代为研究对象,分别测定了杂种牦牛和家牦牛公牛初生重、6月龄、18月龄、28月龄体重和体尺,同时进行了屠宰试验。结果1/2野血牦牛、1/4野血牦牛初生重、6月龄、18月龄和28月龄体重均极显著高于同龄家牦牛(P＜0．01);6月龄、18月龄、28月龄体尺指标也是杂交牛极显著高于家牦牛(P＜0．01);屠宰试验结果表明,18月龄、28月龄1/2野血牦牛和1/4野血牦牛比同龄家牦牛分别多产肉16．62 kg、24．70 kg和11．45 kg、13．70 kg,差异极显著(P＜0．01)。更多还原

【Abstract】 Crossbred progeny of local yaks and wild yaks demonstrated the obvious hybrid vigor.The body size and weight of crossbred and domestic yaks at birth,6 mo.,18 mo.,and 28 mo.were recorded in the slaughter experiment.The results showed that the body weight and size of half—and quarter—blood yaks at birth,6 mo.,18 mo.,and 28 mo.were significantly higher than that of domestic yaks (P＜0.01);the half—and quarter—blood yaks at 18 mo.and 28 mo.could produce 16.62 kg,24.70 kg, 11.45 kg,and 13.70 kg more meat than that of domestic yaks(P＜0.01),respectively.更多还原