Economically useful characteristics of Holsteinized black- and-white cows and correlations between them

The analysis of interdependence between productivity and the A system parameters of a linear exterior evaluation among the daughters of bull-producers of different origin suggests a practical need in exterior evaluation and its interdependence with productivity in a separate herd under specific natural and economic conditions. The revealed high correlation coefficients between the main economically useful characteristics in the offsprings of foreign breeding producers indicate that the selection of any characteristic will have a positive impact on other ones. This fact, in turn, results in effective selection of cows and can be a favorable factor in increasing the cow’s milk productivity.