The experimental data was statistically processed and analyzed by ANOVA and the least squares method (LSM) by applying the GLM procedure of the SAS 9.1.3 program package (SAS Inst. Inc. 2002-2003). The breed was introduced into the model as an independent variable while the mass of freshly slaughtered pig carcass sides was a dependent variable. When means were significantly different, Tukey’s test was applied to compare the mean values of the genotypes