Article
Short communication: Modification of genetic evaluation of herd life from a three-trait to a five-trait model in Canadian dairy cattle.
Journal of dairy science - 1 Apr 2007
Sewalem A, Miglior F, Kistemaker G J, Sullivan P, Huapaya G, Van Doormaal B J
Abstract excerpt
The national genetic evaluation of herd life for Canadian dairy breeds was modified from a 3-trait to a 5-trait animal model. The genetic evaluation incorporates information from daughter survival (direct herd life) and information from conformation, fertility, and udder health traits that are related to longevity (indirect herd life). Genetic evaluations for direct herd life were based on cows' survival from...
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