Interbreed differentiation in terms of the coefficient of decline in growth intensity in early ontogenesis, and the effects of feeding various genotypes of young pigs on their development and meat quality.

Abstract

The effects of the melanocortin receptor 4 (Mc4r) gene and the developmental slowdown in growth intensity in young large white pigs are examined in
this study. Research was done at the Jazz meat processing facility, the State Institution "Institute of Pig Breeding and APV of the National Academy of
Sciences," and the Institute of Grain Crops of the National Academy of Sciences' animal husbandry laboratory. Pursuant to National Academy of Sciences
Program No. 30: "Innovative Technologies of Breeding, Industrial, and Organic Production of Pig Farming Products," the current investigation was
designed to learn more about those areas of research. Each animal's meat quality and fattening efficiency were measured by taking its age at 100 kg of
live weight (in days), average daily gain in live weight (in grams) during the control fattening period, chilled carcass length (in centimeters), bacon half
carcass length (in centimeters), and lard thickness (in millimeters) at the level of 6-7 thoracic vertebrae. The coefficient for the diminishing growth
intensity was calculated using the Yu. K. Sviechin method. Biometric research data processing follows accepted industry standards. Live weight at 4 and
6 months of age, fattening and meat quality (age at which they reach 100 kg, days; lard thickness at the level of 6-7 thoracic vertebrae, mm; length of
the chilled carcass, cm), and other factors are used to categorize piglets in the managed population as I class or elite class. Coefficients of growth
retardation range from 108.57 to 142.51 among the restricted animal population. The young pigs of the managed population are classed as I class and
elite class based on parameters including live weight at 4 and 6 months, age upon attaining 100 kg, fat thickness at the level of 6-7 thoracic vertebrae,
and chilled carcass length. Mc4r A animals outperformed Mc4r AA animals by an average of 5.90% in fattening and meat quality. Differences in daily gain
in live weight (23.3 g; td = 2.62); age at 100 kg (1.59) and carcass length (1.4 mm; td = 2.12); and age at 100 kg (2.12) can be seen between experimental
groups when using the coefficient of the intensity of growth decline (K) to categorize pig breeds in young animals. Potentially useful in selection and
breeding at a rate of 75.0% each are the coefficient of the intensity of growth decline (K) and the Tyler B. index. Using young pigs of the Mc4r G
genotype and animals from the I group, whose coefficient of the intensity of growth decline (K) ranges from 115.61 to 123.27 points, increases output
by 3.68-1.75 percent..