摘要
牦牛对高寒环境有良好的适应性,但培育程度低。传统的藏黄牛×牦牛、引进种牛自然交配以及冷冻精液、人工授精的手段都存在诸多问题。三元杂交在一定程度上解决了牦牛种间杂交受胎率、繁殖率、犊牛成活率低的问题,并且杂种优势显著,是牦牛改良的一条新途径。
The adaptability of yak to high and cold conditions is rather favorable, but its breed is low. The methods occur many problem that traditionally Tibet cattlex yak, natural mating between imported breed and local yak, freezing sperm and artificial fertilization. Three-element crossbreed have resolved these problems in a way, lower rates such as fecundation, reproduce, survivance of calf, and that heterosis is notable, which has become another route for yak＇s improvement.
出处
《畜禽业》
2006年第4期39-41,共3页
Livestock and Poultry Industry
关键词
牦牛
三元杂交
杂种优势
改良
Three-element crossbreed
Heterosis
Improvement
