次级性状在奶牛育种中的应用  

The Application of Secondary Traits in Dairy Cattle Breeding

作　　者：范大有[1] 许尚忠[2] 

机构地区：[1]贵州黔南民族职业技术学院生物工程系,贵州都匀558000 [2]中国农科院北京畜牧兽医研究所,北京100094

出　　处：《山西农业大学学报（自然科学版）》2007年第6期113-116,共4页Journal of Shanxi Agricultural University(Natural Science Edition)

摘　　要：次级形状是指那些对生产没有直接影响的性状,按作用主要分为四类:繁殖性状、体型性状、健康性状和生产效率性状。长期以来对奶牛的育种主要着重于提高主生产性状,而对次级形状较少直接选择。从而造成了牛机体发育不平衡,导致使用年限缩短,抗病力及繁殖力低下等缺陷,影响奶牛育种进程。因此,次级性状在奶牛育种中的利用成为研究的重点。Secondary Traits are the properties that do not directly affect to production.For their function mainly classified four sorts: reproduction traits,bodily form traits,healthy traits and produce efficiency traits.For a long time,dairy cattle breeding mostly focus on improving production traits, moreover rarely directly focus on secondary traits.Thereby,that cause imbalance of cattle body development,led to the use of cattle shorter life,as well as the shortcomings that low resistance to disease and low fecundity.So,secondary traits are becoming researching emphases in dairy cattle breeding.

关 键 词：次级性状 奶牛 育种 

分 类 号：S813[农业科学—畜牧学]