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Article: Multiple-Trait Multiple-Country Genetic Evaluations for Udder Health Traits
- Article from:
- Journal of Dairy Science
- Article date:
- December 1, 2006
- Author:
CopyrightCopyright American Dairy Science Association Dec 2006. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
International genetic bull evaluations of somatic cell counts (SCC) from 8 different Holstein populations and clinical mastitis from 3 of these populations were inferred simultaneously using a multiple-trait-multiple-country evaluation (MT-MACE) model. This model considered effective independent weighting factors and multivariately deregressed national genetic evaluations for countries with multiple-trait national models. Predictions of genetic merit from MT-MACE and their reliabilities were compared with the corresponding results from 2 separate single-trait-multiple-country evaluations (ST-MACE) for different groups of bulls. The assumed heritabilities for clinical mastitis ...
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