ВЛИЯНИЕ ГЕНОВ ДИАЦИЛГЛИЦЕРОЛ О-АЦИЛТРАНСФЕРАЗЫ 1 (DGAT1) И СОМАТОТРОПИНА (GH) НА ПОКАЗАТЕЛИ МОЛОЧНОЙ ПРОДУКТИВНОСТИ КОРОВ КРАСНОЙ БЕЛОРУССКОЙ ПОРОДНОЙ ГРУППЫ

Abstract

The work presents the results of studies on the influence of diacylglycerol O-acyl transferase 1 (DGAT1) and somatotrophin (GH) genes taking into account their polymorphism on the milk productivity of red Belarusian cows. The object of the research was biological material from cows of red Belarusian breed contained in the USP Novi Dvor-Agro of the Svislochsky district of the Grodno region. DNA diagnostics of genotypes by the genes diacylglycerol O-acyl transferase 1 (DGAT1) and somatotrophin (GH) were carried out using polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP). As a result of the research carried out on the population of cows of the red Belarusian breed, the polyforphism of the gene somatotrophin (GH), represented by two alleles - GH L and GH V , with three genotypes GH LL , GH LV and GH VV identified. Among the test animals, individuals with a GH LL allele variant of 66% were more likely to cows, the GH LV was identified in 32%, and the GH VV was detected in only 2% of cows. By the gene diacylglycerol O-acyl transferase 1 (DGAT 1) polymorphism was identification, all animals had only one genotype, DGAT1 KK . Results of studies conducted on the effects of diacylglycerol O-acyl transferase 1 genes (DGAT1) and somatotrophin (GH) on milk productivity indices of cows of the red Belarusian breed group showed that in most cases animals with genotype GH LL outnumbered their peers GH LV and GH LL , in terms of 305 days of lactation per 0.9-10.1%, fat and protein flakiness per 0.2-0.3 p.p., the amount of milk fat and protein in milk per 1.1-9.1%. Evaluation of milk productivity of cows by the gene diacylglycerol O-acyl transferase 1 (DGAT 1) in dynamics shows that with increase of lactation sequence number milk productivity indices increase.