CHEMICAL COMPOSITION ABERDEEN-ANGUS X BLACK-MOTTLED BOVINE DEPENDING ON GENOTYPES FOR THYREOGLOBULIN (TG5) CALPAINE (CAPN1) AND MYOSTATIN (MSTN)
The study of the chemical composition of aberdeen-angus beef x black-mottled bulls, depending on the genotypes for the genes of thyrioglobulin (TG5) calpain (CAPN1) and myostatin (MSTN), established a positive relationship between the genotype MSTN<sup>BB</sup>CAPN1<sup>GG</sup>TG5<sup>TT</sup> on the chemical, amino acid, fatty acid and vitamin composition, as well as on the technological properties of meat. Thus, the protein and fat content in the meat of animals with the MSTN<sup>BB</sup>CAPN1<sup>GG</sup>TG5<sup>TT</sup> genotype was increased by 1,8-2,3 pp and 1,2-0,9 pp. (P≥0,05), ashes per 0,01 p.p. and 0,02 p.p., percent moisture retention and moisture binding ability were higher, by 1,3-1,8 p.p. and 0,8-2,7 p.p., amino acid content was higher from 1,8% to 32% (P≥0,05), and a superiority in amount in meat of sodium, magnesium, iron, zinc, calcium and phosphor was also established by 76,8-127,7 mg/kg, 2,79-31,8 mg/kg and 84,57-453,24 mg/kg, respectively, compared with animals alternative genоtype.