Activity of blood serum enzymes and their relationship with feeding and meat qualities in young pigs of different intrageneric differentiation according to the “formation intensity” index

Abstract

The article presents the study results of the activity of blood serum enzymes, fattening, and meat qualities of young pigs of the universal direction of productivity, considering their intrabreed differentiation according to the “formation intensity” index. It was established that the activity of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) in the blood serum of young pigs of the large white breed corresponds to the physiological norm of clinically healthy animals; by the age of reaching a live weight of 100 kg, the thickness of lard at the level of 6–7 thoracic vertebrae and the length of the chilled carcass – I class and elite class. Taking into account the intrabreed differentiation of young pigs of the large white breed according to the “formation intensity” index, the animals of the experimental group I (∆ = 0.715–1.009) exceeded those of the same age as II (∆ = 1.011–1.356) in terms of average daily increase in live weight by 5.71%, age reaching a live weight of 100 kg – 1.28 %, fat thickness at the level of 6–7 thoracic vertebrae – 1.44 %. The pairwise correlation coefficient between biochemical indicators of blood serum and fattening and meat qualities of young pigs of the large white breed shows that this biometric indicator varies from -0.344 ± 0.1485 to +0.402 ± 0.1448. The maximum increase in additional production was obtained from young pigs of the first experimental group, in which the “formation intensity” index ranges from 0.715 to 1.009 points (+3.40 %). The criterion for selecting highly productive animals of the leading herd based on the absolute parameters of their offspring's fattening and meat qualities is their correspondence to the elite class, according to the “intensity of formation” index – 0.715–1.009 points