THE EFFECT OF INBREEDING ON THE DURATION OF THE PRODUC-TIVE USE OF HOLSTEIN COWS

Abstract

In the conditions of the Smolensk region, the productive traits of Holstein cows purchased in Europe and the USA, as well as their offspring, who have adapted well to the new conditions and have high indicators of dairy productivity, were studied. A comparative assessment of the productive traits and productive use of outbred and inbred Holstein cows in the conditions of the Smolensk region was carried. In breeding with Holstein animals, in order to increase life duration and lifelong productivity, it is recommended to use close inbreeding on the livestock of outbred animals. Studies investigating the effect of inbreeding on the productive use duration in Holstein cows in the Smolensk region conditions is indicate the feasibility of increasing the productive longevity of animals, taking into account their linear affiliation and degree of kinship, with using of individual selection of pairs while maintaining an acceptable level of inbreeding. The creating of Holstein cattle stable population will have a positive impact on the region's dairy cattle breeding.