Calpastatin (cast) gene polymorphism and selected meat quality traits in pAbstarc : The investigation was carried out on a group of 245 pigs (114 NN and 131 Nn as regards RYR1) belonging to different breeds. Determined was meat pH, colour, water holding capacity, drip loss during storage and sensory assessment of raw meat consistency. Several significant relations were proved between the examined meat traits and polymorphic forms of the calpastatin gene. Polymorphism at locus CAST/HinfI was related to pH1 value (P