prerequisite for dairy offspring hereditary character improved and cow herd gene frequency changed was the work of dairy cattle breed selection and individual planned mating.
而奶牛个体选配工作是保证奶牛育种工作顺利开展的有效措施之一。
conclusion rational breeding may obtain higher lincomycin producing strain, its highly yielding ability and hereditary character is steady relatively.
结论推理选育可得林可霉素高产菌株,且高产性能及其遗传特性较为稳定。
the meat hereditary character of fuzhou black pig, duroc, new landrance, sige and the cross-bred pig, altogether 12 breeds or cross-breeds of 86 pigs, was studied on this paper.