According to the research criteria, carcasses in the three analyzed conformation classes (S, E, U) differed significantly (p≤0.01) in conformation, backfat thickness and LL thickness at a similar warm weight (Table 1). Analysis of chemical composition of the LL muscle in the carcasses from the various conformation classes showed a similar content
of protein, and a similar ash and dry matter. A significantly (p ≤ 0.05) higher intramuscular fat was found in U carcasses compared to S and E carcasses.