Abstract
1. Effect of polymorphism of milk protein and hormone genes on milk productivity of black pied cows L. A. Kalashnikova, Ya. A. Khabibrakhmanova, A. Sh. Tinaev Russian Agricultural Sciences CrossRef
Highlights
K-casein (CSN3) as well as growth hormone (GH) genes are considered to be potential genetic markers for the milk production trait in cattle
With regard to the CSN3 locus, the A and B alleles appear with the highest frequency among cattle breeds
The AB bulls were characterised by a higher breeding value for fat (P
Summary
K-casein (CSN3) as well as growth hormone (GH) genes are considered to be potential genetic markers for the milk production trait in cattle. Among several mutations in the bovine growth hormone gene (bGH), the most investigated one is GENE POLYMORPHISMS AND MILK TRAITS IN CATTLE the point mutation causing the leucine/valine substitution in the 127 position of the aminoacid chain (Seavey et al, 1971). An extensive amount of work has been done on associations between the A/B or L/V polymorphisms and productive traits in cattle; published results seem to be contradictory. The aim of the present study was to evaluate the effect of the CSN3 (A and B alleles) and GH (L and V alleles) loci on milk production traits, based on the breeding values of genotyped A l bulls
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