Correlation between certain parameters of pig carcass quality in unconventional housing systems

Abstract

Major qualitative parameters of Landrace pig carcasses are presented in this paper. Phenotypic correlation between carcass quality indices and meat yield of carcass sides was investigated. Fatteners included in this research (117) were reared in non-conventional conditions, on deep litter, and as litter straw was used. Meat yield of pig carcass sides was evaluated on the slaughter line using the 'two point' method (Džinić et al. 2004) and mathematical model using FOM-device (defined by Petrović et al. 1996). Meat yield of carcass sides estimated using FOM was 56,29%, and by method of 'two points' 53,16%. Of basic quality parameters of pig carcasses the strongest correlation assessed using FOM device was established between meat yield of carcass side and thickens of fat tissue - LF and RF, and using the method of two points, between meat yield of carcass side and thickness of fat tissue - X1 i X2. Established correlations were negative, strong and statistically significant (-0,85**; -0,87**and -0,97**; -0,77**). Results of the assessment of quality of pig carcasses obtained using method of two points (53,16%) and by instrumental method on right carcass sides using FOM device (56,29%) differed, which indicates need to develop new equations for evaluation/assessment of share of muscle tissue in pig carcasses.

U radu su prikazani važniji kvalitativni parametri svinjskih trupova rase švedski landras. Ispitivana je i fenotipska povezanost pokazatelja kvaliteta svinjskih trupova sa mesnatošću polutki. Tovljenici obuhvaćeni ovim ispitivanjem (117) držani su u nekonvencionalnim uslovima, na dubokoj prostirci, a kao prostirka u tovu korišćena je slama. Na liniji klanja ocenjena je mesnatost svinjskih polutki metodom 'dve tačke (Džinić et al. 2004) i matematičkim modelom FOM-uređajem (koji su definisali Petrović et al. 1996). Mesnatost polutki procenjena FOM-uređajem iznosila je 56,29%, a metodom 'dve tačke' 53,16%. Od osnovnih pokazatelja kvaliteta svinjskih trupova u najjačoj povezanosti s mesnatošću polutki (procenjene FOM-uređajem) bila je debljina masnog tkiva LF i RF i debljina slanine X1 i X2 (ocenjena metodom 'dve tačke'). Ustanovljene korelacije su bile negativne, jake i statistički značajne (-0,85**; -0,87**i -0,97**; - 0,77**).Dobijeni rezultati vrednovanja kvaliteta svinjskih trupova metodom 'dve tačke' (53,16%) i instrumentalnom metodom na toplim desnim polutkama, FOM-uređajem (56,29%) odstupaju, što ukazuje na potrebu izrade novih jednačina za procenu udela mišićnog tkiva u trupovima svinja.