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The results of researches of absolute and integrated growth parameters, fattening and meat qualities of young pigs of different genotypes according to the receptor gene of melanocortin 4 (Mc4r) are presented, and the level of correlation relations between the features is calculated. Studies have shown that according to the live weight indices at the 2–4-month of age, the age of reaching a live weight of 100 kg and the thickness of the fat at the 6–7 thoracic vertebrae, the young pigs of the large white breed of the control herd (Druzhba-Kaznacheyivka LTD of the Dnipropetrovsk region) meets the requirements of class I and elite class. It was found that young pigs of the genotype AA for the receptor gene of melanocortin 4 (Mc4r) prevails on the peers of the genotype AG on the basis of growth on average by 5.62 %, and on fattening qualities – by 3,09 %. The thickness of the fat at the level of 6–7 thoracic vertebrae is the difference in favor of young pigs of large white breeds of genotype AG of 6.75 %. The correlation coefficient between absolute and integrated growth rates, fattening and meat qualities in young pigs of different genotypes according to the receptor gene of melanocortin 4 (Mc4r) varied from – 0.863 ± 0,0958 (thickness of fat at 6–7 thoracic vertebrae, mm х SI5 – selection index of fattening and meat qualities of young pigs, points) to + 0,675 ± 0,1374 (live weight at 2 months of age, kg х index «intensity of formation» (Δ t), points).

Growth, fattening and meat guality parameters among young pigs with different snp genotypes of melanocortin – 4 receptor gene (mc4r)