Qualitative indicators of the longest back muscle of bulls of different genotypes

Abstract

The article presents the results of determining morphometric indicators, biological usefulness, physico-chemical properties and technological features of the longest back muscle of Red steppe (group I), Simmental (group II) and Kazakh white-headed (group III) breeds under intensive cultivation. The obtained data were processed by the method of variation statistics according to N.A. Plokhinsky with the determination of the reliability of the indicators using the Student's criterion. It was found that Kazakh white–headed bulls surpassed their peers of the Red steppe and Simmental breeds in depth of the longest back muscle by 11 mm (22.45%) and 8 mm (15.38%), respectively, in width – by 7 mm (8.24%) and 4 mm (4.55%), the cross-sectional area - by 13.63 cm2 (33.53%) and 10.47 cm2 (23.90%). The muscle tissue of Kazakh white-headed bulls was distinguished by a higher biological value. At the same time, the content of the essential amino acid tryptophan in their muscle tissue was 360.35 mg%, the value of the protein quality index was 5.97 units. In the Red Steppe and Simmental bull calves, the value of the analyzed indicators was at the level of 350.02 mg%, 352.40 mg% and 5.62 units and 5.70 units. The advantage of meat products of Kazakh white-headed bulls in terms of moisture capacity was noted. At the same time, the muscle tissue of the red steppe bulls was characterized by a darker color