Abstract
The aim of this study was to determine the influence of MHS-genotype and feeding regime on the growth and development of muscle and fatty tissue in the whole body as well as in hams of hybrid pigs. The experiment was carried out on 72 barrows that were divided into 4 groups regarding the MHS-genotype (NN and Nn) and feeding regime (standard and intensive). Data necessary to determine the volume of examined tissues were obtained by means of magnetic resonance tomography. During the fattening period there were no statistically significant differences between pig groups with respect to total lean content of the body although the feeding regime effect in the finishing fattening phase was on the margin of statistical significance (<i>P</i> = 0.057). Differences between investigated groups with respect to the lean content in hams were not significant either. Results of this research lead to a conclusion that different feeding regimes and MHS genetic status of pigs do not have a significant influence on the growth of muscle and fatty tissue in hams.
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