The experiment was carried out on two groups of fatteners crossbreds Pul x PLW (group I 20 heads) and PL x PLW (group II – 20 heads). The fattening was conducted for 99 days in a period when the average body weight of pigs ranged from 30.5 to 105 kg and it was divided into two periods that lasted 53 and 46 days, respectively. Pigs of both groups were fed with the same mixtures based on wheat and barley (first period of fattening – 12.99 MJ ME, 170 g crude protein, 9.60 g lysine) and only barley (second period of fattening – 12.49 MJ ME, 150 g crude protein, 8.37 g lysine) supplemented with protein concentrate. The PL x PLW pigs had better daily weight gain, feed conversion ratio and were slightly more fleshiness and less fatty compared to Pul x PLW pigs. Pigs of group I, despite worse results of slaughter value, were characterized by better meat quality and more crude protein and intramuscular fat in longissimus muscles. The fat contained significantly (P ≤ 0.05) more α-linolenic acid (C18:3). Longissimus and adductor muscles in the I group had better water holding capacity and lower drip loss, but significance difference only in longissimus muscles were noticed.

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