Article
Genetic changes of survival traits over the past 25 yr in Dutch dairy cattle.
Journal of dairy science - 1 Dec 2016
van Pelt M L, Ducrocq V, de Jong G, Calus M P L, Veerkamp R F
Abstract excerpt
Genetic correlations and heritabilities for survival were investigated over a period of 25 yr to evaluate if survival in first lactation has become a different trait and if this is affected by adjusting for production level. Survival after first calving until 12mo after calving (surv_12mo) and survival of first lactation (surv_1st_lac) were analyzed in Dutch black-and-white cows. The data set contained 1,108,745...
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