杂种黄公牛与牦牛杂交的F_1代生长发育测定

The Determination of the Growth and Development of F_1 Generation Hybrid Yellow Cows Crossbreed with Yaks

揭示了(西×黄)♂×牦牛♀和(黑×黄)♂×牦牛♀两个牦牛三元杂交组合繁殖的F1代犏牛生长发育情况,结果表明,F1代犏牛各年龄段的体尺、体重杂种优势明显,且母犏牛提前1～2岁投入生产,建议在牦牛杂交改良中推广这两个牦牛三元杂交组合。

This article probes into the situation of growth and development of the F1 generation of cattle yak offspring from the three-way crossbreed in combined propagation of the (western hybrid yellow cow) ♂crossbreed with the yak ♀and the (black hybrid yellow cow) ♂crossbreed with two yak ♀. The results have indicated that the physical dimensions and weight of the various age segments of the cattle yak show clear superiorities and the female cattle yak can begin production 1 to 2 years earlier. It is recommended that the three-way crossbreed in combined propagation be generalized in the improvement of yak crossbreeding.