SUMMARY. In recent decades, selection in pig farming has been aimed at obtaining animals with high growth rate and increased meat yield in the carcass, resulting in a tendency to deteriorating the quality characteristics of pork. One way to solve this problem is to develop genetic markers of pig meat quality and to use them in breeding programs along with the markers of other productive traits. The article presents the results of the analysis of the association of genes IGF2 (SNP
g.3072G > A), CTSD (SNP g.70G > A) and CTSF (SNP g.22G > C), localized in the QTL region of the distal end of the p-shoulder of chromosome 2, with the indicators of meat quality and carcass structure of Ukrainian Large White breed (UVB) pigs. According to these SNPs, all genes were characterized by a high level of polymorphism (PIC = 0,343–0,371). The association of CTSD (SNP g.70G > A) with the content of intramuscular fat (p = 0,02), moisture in meat (p = 0,03) and its moisture holding capacity (p = 0,03) was established. CTSD (SNP g.70G > A) also had an additive effect on an important selection trait - the thickness of spinal fat (p = 0,05), it was the highest in pigs of the g.70GG genotype. The connection of CTSF (SNP g.22G > C) with the moisture content in the meat (p = 0,01) and the association of IGF2 (SNP g.3072G > A) with the loss of moisture during its heat treatment (p = 0,01)was determined. The polymorphisms of the studied genes can be used as genetic markers in marker-associated selection of Ukrainian Large White pig breed.
Keywords: Ukrainian Large White pig breed, SSC2, CTSF, CTSD, IGF2, SNP, meat quality, association analysis
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