Association of cattle growth hormone gene polymorphism with milk productivity

Polymorphisms in two growth hormone (GH) gene regions, intron 3 (MspI-polymorphism) and exon 4 (AluI polymorphism), and their association with milk productivity in Black Pied, Bestuzhevskaya, and Simmental cattle breeds have been studied. It was shown that allele GH ^V at the AluI polymorphic site and allele GH ^D at the MSPI polymorphic site of the GH gene, particularly in homozygous state, were more favorable in terms of agricultural importance than the GH ^L and GH ^C alleles.