THE PECULIARITIES of DYNAMICS of GROWTH and DEVELOPMENT of YOUNG PIG of DIFFERENT GENOTYPES
He results of the evaluation of the growth and development of young pigs of different genotypes are presented. The level of absolute and relative increments of young animals from birth to six months of age has been determined. The level of absolute and relative increments of young animals from birth to six months of age has been determined. The indices of the intensity of formation, the uniformity and growth stress were calculated. A comparative analysis of the growth rate of purebred and cross-breeding youngsters obtained from the crossing of stud boars Ukrainian Steppe White (USW) and Ukrainian Meat (UM) with breeding boars of Ukrainian and foreign breeding - Large White (LW) and Landrace (L), showed advantage for most signs of crossbred animals who inherited the best qualities from both parents. It was established that the hybrid young pigs from the combination of ♀USW x BW by live weight at two months of age exceeded the analogues of the control group (USW x USB) and the experimental groups (USB x L) and (USW x UM) by 10.2% (P ≥ 0.999), 11 4% (P ≥ 0.999) and 13.3% (P ≥ 0.99). This trend was manifested in the following age periods; in particular, at the age of six months, the difference between these groups was 3.5%, 1.6 and 4.8%, respectively. In the periods studied, the using of the above-mentioned the breeding boars' genotypes on the sows of Ukrainian Meat breeds has increased the live mass of piglets respectively by 12.0% (USW x USW), 8.9% ½ (UM x L), 4.3% ½ (UM x USW) and 9.5%, 4.2, 8.3%.