GENEALOGICAL STRUCTURE AND REPRODUCTIVE QUALITIES OF THE LANDRACE PIGS POPULATION

The population of Landrace sows is represented by 8 families. The most numerous are the Zabava (15.7%) and Zateinitsa (14.9%) families. On average, for 134 sows, the prolificacy was 11.5 heads, milk yield was 6.6 kg, and the litter weight at weaning was 88.9 kg. Of the 8 families, the most productive were the sows of the Zadorinka family, which had a prolificacy of 13.2 heads, milk yield of 63.5 kg, and the litter weight at weaning was 94.2 kg, which is 0.7 heads or 5.6% and 1.6–2.2 heads or 13.7–20,0% (P0,001) more than sows of the Zabava, Zastupnitsa, Zateinitsa, Zemlyanichka, and Zarnitsa families. In comparison with the Zenitka family, the difference in prolificacy was 2.4 piglets or 22.2% (P0,001). The calculations carried out confirm the economic efficiency of using sows of different families (profitability level makes from 1.11 to 9.34%).