The influence of feeding level on the growth of pigs depending on their genotype

The growth and development of pigs is determined by their genotype environmental conditions (primarily the level feeding), however, number works aimed at studying complex influence genetic non-genetic factors in interaction currently insufficient. purpose our work was to estimate effect MC4R genotype, feeding these on backfat thickness crossbred investigate possibility correcting melanocortin-4-receptor gene polymorphism adjusting ration. Studies were conducted 50 gilts obtained crossing sows large white breed with landrace boars. Experimental "Maxi 2010" farm weighed birth, then age 28 days (at weaning) 4, 6, 8 months. Fat measured Genetic studies a certified laboratory Institute Pig Breeding Agroindustrial Production. Analysis blood samples revealed that this group had sufficient for research (Polymorphism Information Content equil 0.35). frequency distribution / SNP c.1426 G>A locus 0.06 (AA) : 0.58 (GA) 0.36 (GG). type significantly influenced live weight 4 months average daily gains experimental over period 28–120 days. Starting 6 significant organized (feeding + genotype) recorded. At months, both established. Animals GG receiving restricted feed ration lower thickness. difference between (restricted ration) AG (high feeding) reached value 12.9% (2.0 mm). lowest performance greatest fat under limitation, which important raising young subsequent reproduction. Therefore, when selecting be used further reproduction, desired GG. In future, it will desirable repeat study larger pigs, so experiment involves animals AA statistical processing.