Aberdeen Angus beef quality and profitability in dependence of the genotypes

The study of the influence of some candidate genes on beef cattle productivity has been conducted. The Aberdeen Angus bulls (n=9) of Russian population have been genotyped on leptin, calpain 1 and calpastatin gene polymorphisms by earlier developed own test systems based on PCRRFLP and RT-PCR methods. The data of live weight, carcass weight and yield, content in the carcass of premium cuts, meat pulp, fat and trimming and broth bones have been registered. In addition, the profits of the sale of bulls` beef has been counted. The correlation analyses has shown the higher live weight and more content in the carcasses of premium cuts and meat pulp in beef obtained from animals of CC-Arg4Cys LEP, GG-CAPN1_316, TTCAPN1_ 4751, GG-CAST_282 and GG-CAST_2959 genotypes. The cost of the sale of these animals` beef was also higher due more content of the most expensive cuts in their carcasses. We have concluded that the studied gene polymorphisms could be perspective genetic markers on meat productivity provided the conduction of the investigation of largescale correlation analysis of the allele variants with the phenotype appearances with the further study of the gene expression, confirming their significant influence on the beef production and quality.