The influence of genotype and growth rate on carcass composition and meat quality of pigs
1999
Krska, P. | Bahelka, I. | Demo, P. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic)) | Lukacova, A.
The carcass traits were studied in 1.430 pigs kept under identical conditions. The animals were divided into two genotypes and three nested subgroups according to daily weight gain (I- up to 750 g, II- 750-900 g, III- above 900 g daily weight gain). The pigs were slaughtered at 100 kg live weight. Significant differences (P0.001) between two commercial types in % lean meat content, valuable lean meat cuts, average backfat thickness, musculus longissimus dorsi area, % meat of ham with bones of carcass weight as well as in pH45 were found. Significantly (P0.05) worse feed conversion was achieved in reproduction-meat type in the subgroups with daily weight gain up to 750 g and/or 750-900 g. A decreasing proportion of % lean meat content in reproduction-meat type (53.12, 53.37, 51.53 % according to subgroups I, II, III ) and in the meat type (56.06, 55.13 and 54.48 %) were observed. A similar trend was found also in the proportion of valuable lean meat cuts. On the other hand, increasing backfat thickness (21.4, 21.7 and 23.2 mm) for reproduction-meat and (19.8, 21.3 and 21.9 mm) for meat type was found with increasing daily weight gain.
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