Shevchuk N. Assessment of selection methods for breeding and improvement of the Ukrainian Red Dairy Breed of cattle.

The work is devoted to the study of selection methods used in different stages of breeding Ukrainian red dairy breed to assess the methodology of the rock-forming process and determine the direction of its further improvement. As a result of research, the methods of selection at different stages of the genesis of the Ukrainian red dairy breed were evaluated and the effectiveness of the use of highly heterogeneous, interlinear selection and moderate inbreeding in the rock-forming process was proved. The natural change of correlations of selection traits that occur during the rock-forming process is proved. The peculiarity of the genesis of the Ukrainian red dairy breed was the different direction of selection, which led to the restructuring of correlations between traits. The duration of economic use, lifelong milk productivity, reproductive capacity of Ukrainian red dairy cows obtained by different selection methods were established, as well as promising families were evaluated and identified by the efficiency of lifelong use of animals.