Article
Selection responses for clinical mastitis and protein yield in two Norwegian dairy cattle selection experiments.
Journal of dairy science - 1 Sept 2003
Heringstad B, Klemetsdal G, Steine T
Abstract excerpt
Inferences from two dairy cattle selection experiments, in which sires were selected from external sources, were drawn by using an animal model to analyze data from the entire population. The first selection experiment was carried out in the period from 1978 to 1989 and included groups selected for high milk production (HMP) and low milk production (LMP). Each year, the highest ranking proven sires for milk...
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