Associations of bovine blood and milk polymorphisms with lactation traits: Holsteins

First lactation milk yield and percentages of fat, solids-not-fat, and protein were analyzed to determine the possible relationships between 14 polymorphic loci and production in Holstein cows. The polymorphic systems examined were blood groups (A, B, C, F, J, L, M, S, and Z), serum transferrin, and...

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Bibliographic Details
Published in:Journal of dairy science 1987-12, Vol.70 (12), p.2585-2598
Main Authors: Gonyon, D.S, Mather, R.E, Hines, H.C, Haenlein, G.F.W, Arave, C.W, Gaunt, S.N
Format: Article
Language:English
Subjects:
Animals
BLOOD
Blood Group Antigens - genetics
BREEDS
Cattle - blood
Cattle - genetics
COMPOSICION
COMPOSITION
COWS
DAIRY CATTLE
Female
GANADO DE LECHE
GENETIC MARKERS
Genotype
GRASA DE LA LECHE
HOLSTEIN-FRIESIAN
LACTACION
LACTATION
Lactation - physiology
LAIT
LECHE
MARCADORES GENETICOS
MARQUEUR GENETIQUE
MATIERE GRASSE DU LAIT
MILK
MILK FAT
MILK PROTEINS
Milk Proteins - genetics
MILK YIELD
OSBOVIN LAITIER
Phenotype
POLIMORFISMO
POLYMORPH
POLYMORPHISM
Polymorphism, Genetic
Pregnancy
PROTEINAS DE LA LECHE
PROTEINE DU LAIT
RACE
RAZAS
RENDEMENT LAITIER
RENDIMIENTO LECHERO
SANG
SANGRE
Species Specificity
VACA
VACHE
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Summary:First lactation milk yield and percentages of fat, solids-not-fat, and protein were analyzed to determine the possible relationships between 14 polymorphic loci and production in Holstein cows. The polymorphic systems examined were blood groups (A, B, C, F, J, L, M, S, and Z), serum transferrin, and milk proteins (beta-lactoglobulin, alpha s1-casein, beta-casein, and kappa-casein). Several statistical models were utilized. Although results differed according to the analysis conducted, in general, no system had a significant association with first lactation milk yield expressed as a herdmate deviation. Most striking were the relationships between milk protein polymorphisms and percent solids-not-fat and protein deviations; beta-casein and kappa-casein alleles had statistically significant associations with these traits. The F system was significant for percent fat deviations, whereas J x L system interactions were significant for all traits. Degree of heterozygosity over the 14 systems was positively associated with percent protein deviations.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(87)80328-4