Efficiency of Selection Indices Usage for Sampling Sown on High-productive Traits

Abstract

The proposed complex index of reproductive traits objectively reflects the total pedigree value of sows on reproductive traits, coefficients of index correlations with implemented traits are valid and vary between 0,37 - 1,00, and multiple pregnancy rate correlation was on high level - 0,87-1,00, milkiness was on middle and high levels - 0,37-0,96. Correlation of milkiness and complex index of reproductive traits of Belarusian meat breed at complex «Zadneprovsky» was lower than that of the rest variants tested, that is connected with low negative correlation of milkiness and multiple pregnancy rate traits - from -0,13 to 0,11. Eliminating index of piglets quantity on the 21nd day has changed (at 0,04-0,06) high correlation of multiple pregnancy with complex index of reproductive traits not significantly, but allowed to increase correlation of complex index with milkiness from 0,01-0,26 to 0,54-0,78.