Carcass quality traits of beef cattle with different DGAT1 genotypes

Abstract

The paper presents the research results on carcass quality traits of beef cattle for different DGAT1 genotypes. The study aimed to detect the effect of SNP DGAT1-K232A on carcass and beef quality of Hereford and Limousine bull calves of different genotypes. The tasks were SNP genotyping of animals by DGAT1-K232A, detecting the impact of SNP on carcass quality and morphological composition, weight and yield of half carcasses, organoleptic properties of meat, as well as the chemical composition of beef. The method of a polymerase chain reaction with a subsequent restriction fragment length polymorphism analysis was used to genotype fattening bull calves of Hereford (91 heads) and Limousine (109 heads) breeds. The animals were raised until 20 months of age in conditions of a resource-saving indoor and pasture-based system. There was an apparent effect of SNP DGAT1-K232A (DGAT1^KK>DGAT1^AA, P◘0.05) on the interior raw fat weight and yield indicators, subcutaneous fat tissue thickness, fat content in the rib eye and a sample of minced meat. Thus, genotyping by SNP DGAT1-K232A can be used as an additional criterion to improve the quality traits of meat in beef cattle breeding.