奶牛育种中的长寿性状
张海亮(),刘澳星,米思远,李想,罗汉鹏,鄢新义,王雅春()
A Review on Longevity Trait in Dairy Cattle Breeding
ZHANG HaiLiang(),LIU AoXing,MI SiYuan,LI Xiang,LUO HanPeng,YAN XinYi,WANG YaChun()

图2. 长寿性状与生产、繁殖、健康和管理性状的遗传相关范围
以存活状态定义的长寿性状统一转换为存活率(将存活定义为1),其估计育种值的有利方向与以时间长度定义的长寿性状一致;不返情率、临床乳房炎和繁殖疾病分别以不返情、临床乳房炎发病、繁殖疾病发病定义为1;图中“ ”“ ”“ ”分别表示绘图时参考的遗传相关研究数目<5条、5—10条、>10条;遗传相关数值的参考文献略

Fig. 2. Genetic correlations between longevity and production, fertility, health and workability traits
The longevity traits defined as the survival status are uniformly converted into the survival rate (the survival is defined as 1), and the favorable direction of its EBV is consistent with the longevity traits defined as the life length. Among the non-return rate, clinical mastitis, and fertility diseases, cows with no return, clinical mastitis, or reproductive diseases respectively were defined as 1. In figure 2, “ ” “ ” “ ” represent that the number of literature related to current trait was less than 5, 5 to 10, or more than 10, respectively. The literature related to this figure is not listed in references