Three-Element Crossbreed for Yak's Improvement

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 cattle×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.