The aim of this study was to examine carcass properties and variability in chemical content and fatty acid composition in the musculus longissimus lumborum et thoracis (MLLT) of different genotypes of pigs. Of 36 male castrated animals used in the trial, 24 were from two strains of Mangalitsa pigs (12 Swallow – bellied (SBM) and 12 White (WM)), while 12 were of the Swedish Landrace (SL) breed (the most abundant meat/fattening breed in Serbia). The warm and cold carcass weights at slaughter were significantly higher in the WM and SL compared with the SBM. Results showed differences in warm and cold carcass dressing percentage between the groups. The SBM had significant lower values than WM and SL pigs. The total fat content was higher in WM and SBM pigs than SL pigs. The SL pigs had a significant higher percentage of water in their MLLT than the SBM and WM pigs. The representative of pig meat breeds, SL, contained significantly less cholesterol in its MLLT compared with the SBM and WM (-15.23% and -15.84%). However, differences in the content of saturated and unsaturated fatty acids were more expressed and distinct. A higher percentage of saturated fatty acids (SFA) and polyunsaturated fatty acids (PUFA) were present in MLTT originating from SL pigs compared with the two Mangalitsa strains. The total monounsaturated fatty acids (MUFA) content was higher in SBM and WM than in SL pigs. The alpha linolenic acid concentration (C18:3 n-3) was significantly higher in SBM than in WM and SL pigs.
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