The experiment covered two-breed fatteners: Polish Landrace and Polish Large White (PL x PLW) and cross breeds: Polish Landrace with Duroc x Pietrain PWL x (D x P). In the longissimus dorsi muscle (LD), pH was measured 45 minutes (pH45) and 24 h after slaughter (pH24), and electrical conductivity (E24). In the lumbar section of LD muscle, among other things, the contents of water, fat, and protein were determined, as well as WHC, drip, cooking losses, colour, and composition of fatty acids. Furthermore, the cooked meat was sensory evaluated using a 5 point scale. In the population examined, no carcasses with PSE and DFD meat were reported. It was found that the intramuscular fatness in LD muscle of three-breed cross breeds, i.e. of PL x (D x P), was by 1.02 % higher compared to the white breed fatteners. In the meat of three-breed fatteners, a lower natural drip, cooking losses, and a darker colour (L*) were reported. The water holding capacity and the content of meat proteins in the evaluated carcasses were comparable. The evaluated sensory properties of cooked loin meat of fatteners in both groups received a little more than 4 points. In the LD muscles of two genotype groups of fatteners, a similar content level of SFA and UFA fatty acids was shown. Moreover, it was found that the content of polyunsaturated fatty acids (PUFA) in the lipids contained in the muscles of PLxPLW fatteners white breeds was by 0.87 % higher compared to three-breed cross breeds [PLW x (D x P)], and, specifically, the level of PUFA n-6 acids was higher. However, the ratio of PUFA n-6 to PUFA n-3 was similar in both groups (15:1).