Comparison of 305- and 365-Day Production Records under Stratified Levels of Herd Production
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چکیده
منابع مشابه
Estimation of Genetic Parameters for Milk Production Trait in Holstein Cows of the Mazandaran Gavdasht Herd Using Test Day Records
Random regression models (RRM) are used for genetic estimations of milk traits in dairy cows. RRM utilize data on traits that are repeated during the time, such as milk trait, which allows of the evaluation of the test day production information. In this study, to estimate genetic parameters for milk production trait, test day records (TDR) were collected from the first lactation of Holstein co...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1962
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(62)89608-8