Effect of polymorphism of milk protein and hormone genes on milk productivity of black pied cows

Abstract

Polymorphism of kappa-casein, beta-lactoglobulin, prolactin, and growth hormone genes is investigated in highly productive Holsteinized Black Pied cows. The effect of genotypes on milk productivity indices of the cows is evaluated on the basis of the highest lactation: milk yield, milk fat and protein content, and milk fat and protein yield.