Article
Improvement in genetic evaluation of female fertility in dairy cattle using multiple-trait models including milk production traits.
Journal of animal science - 1 Mar 2010
Sun C, Madsen P, Lund M S, Zhang Y, Nielsen U S, Su G
Abstract excerpt
This study investigated the improvement in genetic evaluation of fertility traits by using production traits as secondary traits (MILK = 305-d milk yield, FAT = 305-d fat yield, and PROT = 305-d protein yield). Data including 471,742 records from first lactations of Denmark Holstein cows, covering the years of inseminations during first lactations from 1995 to 2004, were analyzed. Six fertility traits (i.e.,...
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