Massey M E, Benyshek L L
J Anim Sci. 1982 Jan;54(1):46-50. doi: 10.2527/jas1982.54146x.
Field records from the North American Limousin Foundation performance testing program provided three data sets for the estimation of genetic, phenotypic and environmental correlations among several performance traits. The traits were: birth weight, preweaning average daily gain, adjusted 205-d weaning weight, postweaning average daily gain, adjusted 365-d yearling weight, weight/d of age, preweaning relative growth and postweaning relative growth. Birth weight had a positive genetic relationship with all measures of growth except pre- and postweaning relative growth. The genetic relationship between preweaning relative growth and birth weight was small and negative. Postweaning relative growth had little genetic relationship to birth weight. The genetic relationships among the various growth characteristics were positive, except for those involving pre- and postweaning relative growth. Postweaning relative growth was negatively associated with preweaning average daily gain and adjusted 205-d weight. Preweaning relative growth had little genetic association with adjusted 205-d weight, adjusted 365-d weight or weight/day of age.
北美利木赞牛基金会性能测试项目的现场记录提供了三个数据集，用于估计几个性能性状之间的遗传、表型和环境相关性。这些性状包括：出生体重、断奶前平均日增重、校正后的205日龄断奶体重、断奶后平均日增重、校正后的365日龄周岁体重、体重/日龄、断奶前相对生长率和断奶后相对生长率。出生体重与除断奶前后相对生长率之外的所有生长指标均呈正遗传关系。断奶前相对生长率与出生体重之间的遗传关系较小且呈负相关。断奶后相对生长率与出生体重之间的遗传关系不大。除了涉及断奶前后相对生长率的那些关系外，各种生长特征之间的遗传关系均为正相关。断奶后相对生长率与断奶前平均日增重和校正后的205日龄体重呈负相关。断奶前相对生长率与校正后的205日龄体重、校正后的365日龄体重或体重/日龄之间的遗传关联不大。
