Association between milk protein genetic variants and genetic values of Canadian Holstein bulls for milk yield traits

The kappa-casein, beta-casein, and beta-lactoglobulin genotypes of 566 bulls were identified by polymerase chain reaction. The associations of these milk protein types with the daughter yield deviations of the 566 bulls for milk, fat, and protein were examined with a mixed model analysis using an an...

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Bibliographic Details
Published in:Journal of dairy science 1996-06, Vol.79 (6), p.1050-1056
Main Authors: Sabour, M.P. (Agriculture and Agri-Food Canada, Ottawa, ON, Canada.), Lin, C.Y, Lee, A.J, McAllister, A.J
Format: Article
Language:English
Subjects:
Animals
BETA LACTOGLOBULINA
BETA LACTOGLOBULINE
Biological and medical sciences
BOVIN LAITIER
CASEINA
CASEINE
Caseins - genetics
Cattle - genetics
Classical genetics, quantitative genetics, hybrids
DNA - analysis
DNA Primers
EPREUVE SUR LA DESCENDANCE
EVALUACION DE SEMENTALES
EVALUATION GENETIQUE DES PERES
Female
FILLE
Fundamental and applied biological sciences. Psychology
GANADO DE LECHE
GENE
GENES
Genetic Variation
Genetics of eukaryotes. Biological and molecular evolution
GENOTIPOS
GENOTYPE
GRASA DE LA LECHE
HIJAS
INSEMINACION ARTIFICIAL
INSEMINATION ARTIFICIELLE
Lactation - genetics
Lactoglobulins - genetics
MATIERE GRASSE DU LAIT
Milk Proteins - genetics
MODELE ANIMAL
MODELOS ANIMALES
PROTEINAS DE LA LECHE
PROTEINE DU LAIT
PRUEBAS DE DESCENDENCIA
RENDEMENT LAITIER
RENDIMIENTO LECHERO
SECUENCIA NUCLEOTIDICA
SEQUENCE NUCLEOTIDIQUE
TAUREAU
TORO
VALEUR GENETIQUE
VALOR GENETICO
Vertebrata
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Summary:The kappa-casein, beta-casein, and beta-lactoglobulin genotypes of 566 bulls were identified by polymerase chain reaction. The associations of these milk protein types with the daughter yield deviations of the 566 bulls for milk, fat, and protein were examined with a mixed model analysis using an animal model. The results suggest that kappa-casein and beta-casein loci had no significant effects on ETA of the bulls for milk, fat, and protein. The effect of beta-lactoglobulin on ETA of protein approached significance. Results suggest that increasing the frequency of the A variant of beta-lactoglobulin in young bulls entering progeny testing improves ETA for protein of the bulls, but the expected improvement is limited
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(96)76458-5