西门塔尔牛与中甸牦牛杂交后代生产性能初探

Preliminary Study on Production Performance of Hybrid Offspring of Simmental and Zhongdian Yak

为提高中甸牦牛杂交后代的生产性能,引进西门塔尔牛冻精,采用同期发情及人工授精技术进行杂交试验,测定杂交后代犏牛的主要生产性能指标,并与中甸牦牛和当地黄牛杂交后代犏牛进行比较。结果表明,人工授精后中甸母牦牛的产犊率为59.26%,杂交后代的成活率为75.00%;母牦牛妊娠平均天数为271 d,生产的犏牛6月龄平均体高89.3 cm,体斜长92.5 cm,胸围115.0 cm,管围13.4 cm,体重112.4 kg;与中甸牦牛和当地黄牛杂交后代犏牛相比,除成活率下降外,西门塔尔牛与中甸牦牛杂交后代的其他繁殖指标及生产性能指标都具有明显优势。

The aim of the present study was to evaluate the production performance of hybrid offspring of Simmental and Zhongdian yak(Simmental-yak hybrids).The chosen female individuals of Zhongdian yak were subjected to estrus synchronization treatment and were artificially inseminated with the introduced frozen semen of Simmental bull.The main parameters associated with production performance of the Simmental-yak hybrids were assessed and compared with that of the hybrid offspring of local Yellow cattle and Zhongdian yak(local cattle-yak hybrids).The results showed that the calving rate of the female artificially inseminated Zhongdian yak was 59.26%,and the survival rate of the Simmental-yak hybrids was 75.00%;the average pregnancy duration of the Simmental-yak hybrids lasted for 271 days;the average body height,body slanting length,chest circumference,cannon circumference and body weight of the 6-month-old Simmental-yak hybrids were 89.3 cm,92.5 cm,115.0 cm,13.4 cm and 112.4 kg,respectively.Except for survival rate,the Simmental-yak hybrids had better performance in the other reproduction and production parameters than the local cattle-yak hybrids.