Optimization of large-scale breeding program of Belarusian black-motley breed of cattle

Abstract

Perfect variant according to value of genetic progress and economic efficiency of large-scale selection of livestock of Belarusian black-motley breed, according to which the number of cows of active part of the population is 480,000, the number of genealogical lines (complexes) in the breed - 6, the number of fathers of bulls in the complex - 2, the semen pool from one bull checked - 30 thousand doses, the number of «effective» daughters to test the bull by offspring - 50, the number of repair calves for elevers - 535, the number of bulls selected on the quality of offspring, - 108. The program will provide genetic progress of breeding population on milk yields at 40 kg of milk per cow annually, the rate of genetic progress of population increases by 1,08 %. Cost-effectiveness of the program will make 159 %.