Research Article

Effect ofCYP19 SNPs on milk production traits of Jersey cows

Inga Kowalewska-Łuczak, Emilia Michniewicz, Hanna Kulig

1. Acta Sci. Pol. Zootechnica, 12(1), 2013, 33‒40

Abstract. The aim of this study was to examine the relationship between genotype two SNPs located in the promoter region of CYP19 gene and milk production traits. The study included 181 Jersey cows. The genotypes were identified by the PCR-RFLP method. The frequencies of the most common alleles were as follows: A − 0.98 (CYP19/PvuII) and A − 0.94 (CYP19/Cfr13I). The results showed that there were no statistically significant associations between the individual genotypes of both SNPs and milk traits; however, the animals with heterozygous genotypes achieved the lowest milk yield and the highest protein and fat content in milk.

Keywords: aromatase, daily milk yield, dairy cattle, milk production traits, CYP19 gene