The results obtained in the study age dynamics of indicators of sperm production of breeding bulls of black-motley and hill breeds indicate on the Republican Center of livestock breeding JSC “ASIL TҮLІK” Akmola Province, Kazakhstan indicate that the quantity of the received sperm production changes by years of their use. Special differences of age dynamics between breeds it isn’t observed
Providing the population of country with high-quality and safe animal products is a top priority of modern science and practice. To solve this problem should be involved cattle genetic resources of domestic and foreign origin. Intensive technology of milk and meat production depends directly on the creation of highly productive animals with a high capacity for adaptation, disease-resistance and suitable for long-term economic use. In the field of breeding a special place is given to the problem of effective selection and evaluation of farm animals by productive and breeding qualities. In the improvement of breeding and productive qualities of animals special role play sires. In the reproduction of the herdthe more widespread isartificial insemination. In this regard, increases the relevance of the selection of sires, evaluation of new genotypes of animals in both dairy and beef directions.