Components of physicochemical properties and chemical composition of mus-cle tissue of young pigs of different growth intensities, the level of their pheno-typic consolidation, and correlation

Abstract

The work presents the results of the study of some biochemical indicators of blood serum, physicochemical properties, and chemical composition of muscle tissue of young pigs of the large white breed and the calculation of correlations between the main quantitative characteristics. The work was carried out in the agricultural formations of the Dnipropetrovsk region, the research center for biosafety and environmental control of agricultural resources of the Dnipro State Agrarian and Economic University, LLC “Globynskyi Myasokbinat” of the Poltava region, the zootechnical analysis laboratory of the Institute of Pig Breeding and Agro-industrial Production of the National Academy of Sciences and the animal husbandry laboratory of the state institution “Institute of Grain Crops of NAAS”. Studies of the fattening and meat qualities of young pigs of the large white breed show that the animals of the controlled population belong to the elite class by the age of reaching a live weight of 100 kg. This indicator in the animals of the experimental group ranges from 167 to 188 days. It was established that the number of samples of the longest back muscle of high quality according to the indicator “moisture retention capacity” is 12.0 %, “fat content” – 16.0%, “tenderness” – 12% and “color intensity” – 16%. A high level of phenotypic consolidation was established in the animals of the II experimental group (the age of reaching a live weight of 100 kg is 177–188 days) according to the content of total moisture (K1 = +0.458, K2 = +0.456), air-dry matter (K1 = +0.492, K2 = +0.500), ash (K1 = +0.527, K2 = +0.534), fat (K1 = +0.559, K2 = +0.518) and calcium (K1 = +0.385, K2 = +0.415). Reliable correlations were established between the following pairs of traits: moisture-holding capacity × protein content (r = -0.484, tr = 2.65), age at which live weight reached 100 kg × calcium (Ca) content (r = -0.392, tr = 2,15), age of reaching a live weight of 100 kg × moisture retention capacity (r = +0.447, tr = 2.40), age of reaching a live weight of 100 kg × loss during heat treatment (r = -0.390, tr = 2.14). This indicates the effectiveness of using the indicator “age of reaching 100 kg live weight, days” for early prediction of calcium (Ca), moisture retention capacity, and loss of muscle tissue during heat treatment in young pigs of the large white breed.