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Genetic analysis of somatic cell score and udder type traits in South African Holstein cows
(South African Society for Animal Science, 2008)Selection accuracy for resistance to mastitis may be increased by combining somatic cell score (SCS) and udder type into an udder health index, using genetic parameter estimates among them. A multi-trait animal model was ... -
Genetic correlations between female fertility and production traits in South African Holstein cattle
(South African Society for Animal Science, 2007)Female fertility is increasingly gaining importance in national dairy cattle breeding objectives worldwide. In South Africa, there is no routine prediction of breeding values for reproductive performance in dairy cattle ... -
Genetic prediction models and heritability estimates for functional longevity in dairy cattle
(South African Society for Animal Science, 2015)Longevity is a major component of the breeding objective for dairy cattle in many countries because of its high economic value. The trait has been recommended for inclusion in the breeding objective for dairy cattle in ... -
Random regression test-day model for the analysis of dairy cattle production data in South Africa : Creating the framework
(South African Society for Animal Science, 2010)Genetic evaluation of dairy cattle using test-day models is now common internationally. In South Africa a fixed regression test-day model is used to generate breeding values for dairy animals on a routine basis. The model ...
