The effect of the gene of the main fibroblast growth factor (FGF2) on the dairy productivity of Holstein cattle

Abstract

The effect of polymorphism of the gene of the basic fibroblast growth factor (SNP11646 A/G) on the milk production of Holstein cows in the conditions of the Republic of Tatarstan was studied. The DNA of 270 full–aged cows was genotyped by PCR - PDRF. As a result, two FGFA – 0,591 and FGFG – 0,409 alleles were identified; and three FGFAA genotypes – 19,6% (53 goals) and FGFAG – 42,6% (115 goals), FGFGG – 37,8% (102 goals). The highest milk yield for full lactation and for 305 days of lactation, a high coefficient of lactation was noted in individuals with the genotype FGF2AG. The best milk quality indicators (high protein content, fewer somatic cells) were found in animals homozygous for the A allele. All cows have a high stable and smoothly decreasing lactation curve, the coefficient of lactation stability is higher for the GG genotype.