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animal modelEukaryote
HolsteinMammal
In dairy cattle breeding, genetic relationships among lactation records are of special interest because most selection operated on first lactations. This selection also complicates estimation of genetic parameters. Techniques which give estimates unbiased by selection should be used. Estimation was done using EM-type REML for an animal model neglecting relationships across herds. Records were from 3,070 Holstein cows which had the fist lactation recorded. Estimates after 17 rounds of iteration for heritabilities and genetic correlations were: h21=.33, h22=.32, h23=.33, r12=.88, r13= .83, r23= .86. Within herd-year-season phenotypic standard deviations were 1,223 kg, 1,323 kg, and 1,265 kg
An animal model was applied to predict genetic merit for Ayrshire milk yield. The model included fix...
Records of the first three lactations of cows were obtained from the file of the Dairy Herd Testing ...
Multiple regression of genetic evaluations of about 170 Holstein bulls on sire, dam, and maternal gr...
Genetic relationships among lactation records are of interest because most selection of bulls is on ...
Milk, fat, and protein yields in first lactation of two samples of 12 herds consisting of 4020 and 4...
WOS: 000227934100012In this study, 3484 milk yield records (1520 first, 1206 second and 758 third la...
Genetic parameters for the first three lactations have been estimated for the main dairy traits (mi...
Milk records of up to the first three lactations of artificially sired Holstein daughters and their ...
Variance and covariance components for milk yield, survival to second freshening, and calving interv...
First lactation milk, fat, and protein yields for first lactations of 8044 Holstein cows in New York...
Milk, fat, and protein yields of Holstein cows from the States of New York and California in the Uni...
A multivariate linear model was used to estimate sire variance and covariance components and residua...
Variance and covariance components for milk yield, survival to second freshen-ing, and calving inter...
Two samples of data from approximately 4000 Holstein cows were analyzed by REML with a multivariate ...
<TT>Estimates of genetic parameters needed to control breeding programs, have to be regularly update...
An animal model was applied to predict genetic merit for Ayrshire milk yield. The model included fix...
Records of the first three lactations of cows were obtained from the file of the Dairy Herd Testing ...
Multiple regression of genetic evaluations of about 170 Holstein bulls on sire, dam, and maternal gr...
Genetic relationships among lactation records are of interest because most selection of bulls is on ...
Milk, fat, and protein yields in first lactation of two samples of 12 herds consisting of 4020 and 4...
WOS: 000227934100012In this study, 3484 milk yield records (1520 first, 1206 second and 758 third la...
Genetic parameters for the first three lactations have been estimated for the main dairy traits (mi...
Milk records of up to the first three lactations of artificially sired Holstein daughters and their ...
Variance and covariance components for milk yield, survival to second freshening, and calving interv...
First lactation milk, fat, and protein yields for first lactations of 8044 Holstein cows in New York...
Milk, fat, and protein yields of Holstein cows from the States of New York and California in the Uni...
A multivariate linear model was used to estimate sire variance and covariance components and residua...
Variance and covariance components for milk yield, survival to second freshen-ing, and calving inter...
Two samples of data from approximately 4000 Holstein cows were analyzed by REML with a multivariate ...
<TT>Estimates of genetic parameters needed to control breeding programs, have to be regularly update...
An animal model was applied to predict genetic merit for Ayrshire milk yield. The model included fix...
Records of the first three lactations of cows were obtained from the file of the Dairy Herd Testing ...
Multiple regression of genetic evaluations of about 170 Holstein bulls on sire, dam, and maternal gr...
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