Effect of Herd Environment on the Genetic and Phenotypic Relationship Among Milk Yield, Fertility, and Somatic Cell Score in Holstein Cattle
Cornell University, Aug., 1998 - 242 pages
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DATA AND METHODS
RESULTS AND DISCUSSION
1 other sections not shown
Ayrshire cattle Banos and Shook breeding programs breeding value calving interval Cell Score LMSCS cells/ml Class using Criterion complete data set Conception Rate correlated response covariance dairy cattle Dairy Sci days open Descriptive Statistics Deviations of Mature environment interaction Equivalent Milk Yield fertility traits fixed effects genetic and phenotypic genetic correlation genetic trend genetic variation genotype by environment Herd Environment Class herd mean Herd Standard Deviation herd-year Herds classified heritability high management class Holstein cattle Holstein cows Holstein data lactation mean SCS Lactation Mean Somatic likelihood function Low and High low management class managed herds mastitis matrix Mature Equivalent Milk Mean and Herd Mean Somatic Cell MEM LMSCS CRFS milk production Milk Yield MEM multiple trait number of herds number of records number of services Oltenacu parity phenotypic correlation Phenotypic Means quartile REML residual variance Schutz Service CRFS sire model somatic cell count Somatic Cell Score sparse matrix Vleck