Vplyv suplementácie betaínu a kreatínmonohydrátu na chemické zloženie,oxidačnú stabilitu a kvalitu mäsa ošípaných heterozygótnych v géne RYR1

Abstract

The aim of this study was to evaluate an effect of betaine and creatine monohydrate supplementation on chemical composition, meat quality, and oxidative stability of pork in pigs genotyped on mutation in RYR1 gene. Totally, sixty pigs – crosses of Lx(HAxPN) were involved in the experiment. Pigs were divided to one homozygous (NN) – control (C1), and three heterozygous (Nn) groups, each group including 15 animals. One group of Nn pigs was the control (C2) and two Nn groups were experimental. Control groups received a standard diet without supplement. Experimental groups were fed the same composition as controls but with supplement of betaine – BET (1.25 g/kg of feed) or creatine monohydrate - CMH (2.0 g/kg of feed) for thirty days prior to slaughter. Pigs C2 had worse meat quality, especially pH45, colour L* and drip loss (P<0.05), than homozygous C1 pigs. Dietary supplementation with betaine increased initial pH and decreased drip loss in Nn group (P<0.05) compared to C2 group. Supplementary CMH also increased pH45 and had a tendency to lowering the drip loss (P=0.058). Both feed additives substantially improved oxidative stability of pork, especially after 120 min incubation (P<0.01), compared to control C2 pigs.