Genetic variants of kappa-casein gene in Busha and Brown Swiss breeds of cattle

First import of Brown Swiss in Montenegro was in the sixties of XX century, and after that it has occasionally been imported either as live animals or semen [12]. According to yl test, both breeds were found to be in Hardy-Weinberg equilibrium that suggesting that the kappa-casein gene in investigated population was not influenced by selection. Cows of AB and BB genotypes showed higher milk fat content when compared to the AA genotype [18]. Because of the evident effects of kappa-casein genetic variants on cheese yield, selection of animals with the favorable kappa-casein B allele is considerable. [...]future studies should be focused on the association between cattle genotype and milk composition characteristics.