Estimated Heterogeneity of Phenotypic Variance of Test-Day Yield with a Structural Variance Model
نویسندگان
چکیده
منابع مشابه
Estimated heterogeneity of phenotypic variance of test-day yield with a structural variance model.
First-lactation test-day milk, fat, and protein yields from New York, Wisconsin, and California herds from 1990 through 2000 were adjusted additively for age and lactation stage. A random regression model with third-order Legendre polynomials for permanent environmental and genetic effects was used. The model included a random effect with the same polynomial regressions for 2 yr of calvings wit...
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Finnish genetic evaluation of dairy cattle is based on test-day (TD) yields, applying a multiple-trait random regression TD model. The model considers the first lactation milk, protein, and fat yield, plus the later lactation milk, protein, and fat yield as different traits, where all the later lactations are modelled as repeated observations (Lidauer et al., 2000). Currently, yields are scaled...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2004
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(04)73349-4