Estimation of Different Pigs Genotypes on Usage Rate of Metabolizable Energy and Essential Aminoacids of Feeds

Abstract

The major biological peculiarity of separate breeds of pigs and their crosses in a differentlevel of nutrients usage for meat production. The most effective nutrients are those nutrients of mixed feeds used (metabolizable energy, crude protein and lysine) for synthesis of muscle tissues by two- and three-breed crosses - correspondingly, 86.1 MJ, 1229 g, 64.9 g and 85.9 MJ, 1226 g, 64.7 g. Among the purebred animals the greatest nutrients transformation into product was noticed with in gilts of Belarusian meat breed - 88.3 MJ of metabolizable energy, 1262 g of crude protein, 66.6 g of lysine counted per 1 kg of muscle tissue gain. Pigs of different genotypes (Belarusian black-motley, Landrace and Large white breeds) on nutrients intake of feeds took middle position among the above mentioned genotypes.So efficiency of feeds usage in the frameworks of one separate genetic population is greatly variable that should be taken into account when managing selection work with this group of animals.