INFLUENCE OF GENOTYPE ON THE SHARE AND DISTRIBUTION OF MUSCLE, FATTY AND BONE TISSUES AS WELL AS COMMERCIAL AND ENERGY VALUE OF PIG CARCASSES

Research was carried out on the carcasses of Large White, Swedish Land race and Line 3. Carcasses were dissected after Weniger et al. (1963) method. Carcasses of line 3 (57.10%) and Swedish Landrace (56.49%) had approximately the same muscle tissue share whereas Large White Carcas ses had a lower muscle tissue share (50.99%). Different distribution o f muscle, fatty and bony tissue in carcasses of the investigated pig g enotypes was determined. Carcasses of Line 3 and Swedish Landrace, whi ch had approximately the same meatiness, also differed in the share of muscle, fatty and bony tissue. The largest share of ham tissue and ab dominal rib part in pig carcass weight was determined in Line 3 (20.29 %, i.e. 10.43%). Muscle tissue of back, shoulder and neck had the high est share in the weight of Swedish Landrace carcasses (10.96%, 10.94%, i.e. 6.47%). As a consequence of different tissue shares and distribu tion, different sales value of pig carcasses of analyzed genotypes was determined. Higher commercial value was genotype carcasses with highe r muscle tissue share - Swedish Landrace and Line 3 and lower in Large White carcasses. Tissues arrangement, i.e. their composition had sign ificant influence on commercial carcass value. Of total 20 right disse cted carcasses of each genotype, the largest number of Large White car casses (11) belonged to commercial class ,,U'', whereas the largest nu mber of Swedish Landrace carcasses (14, i.e. 16) and Line 3 belonged t o class ,,E''. Energy value of Swedish Landrace carcasses and Line 3 w as the same and statistically very significantly lower than energy val ues of Large White carcasses.