GHRH/HaeIII gene polymorphism and its associations with milk production traits in Polish Black-and-White cattle (short communication)

Abstract. The objective of this paper was to evaluate the relationship between the polymorphism of the GHRH and milk production traits of Polish Black-and-White. A total of 881 cows were included in the study. A PCR-RFLP method was used to genotyping. The frequencies of the genotypes and alleles were as follows: 0.0545 for AA, 0.3133 for AB and 0.6322 for BB, and 0.2111 for GHRH^A and 0.7889 – GHRH^B. There were no significant associations between GHRH/HaeIII polymorphism and milk production traits of the analysed cows.