Increasing productive longevity red steppe breed

In these studies, materials are presented that breeders should take into account in order to improve the longevity of the red steppe breed when using improver bulls evaluated not only by the quantitative and qualitative characteristics of milk productivity, the exterior and shape of the udder of daughters, but also their impact on the level of life-long productivity of offspring. The aim of the work was to consider the factors that increase the productive longevity of the red steppe breed of cattle on the example of the economy of the Omsk region. To solve which, we set the following tasks: to analyze the bloodiness of the improving Angler breed in the herd of Azovskoye CJSC in the Azov region (pedigree reproducer for breeding the red steppe breed); to study the genotypic factor of influence of the country of origin and the breed of the father, taking into account individual differences in the results of lifelong exploitation of their offspring; identify a herd improver bull. The research was carried out by the method of group analysis of peers of 420 heads (2009-2010 years of birth) of the IAS «Seleks-Dairy Cattle» database. As a result, the optimal bloodiness of up to 50% was determined for the improving Angler breed in the herd of the farm. The daughters of bulls of Russian selection were distinguished by the greatest duration of economic use, while the characteristic features of the breeders had a significant impact on the duration and efficiency of the use of the offspring, while linear affiliation had practically no effect. To a greater extent, the profitability of lifelong use is 55.3 ± 2.01 in the daughters of Angler bulls. This allows us to recommend their use in the herds of the Omsk region for the development of breeding qualities of the red steppe breed. The daughters of the bull Monolith 231 proved to be the best in the studied rating, so for 8.33 lactations they gave 45890 kg of milk, and the descendants of the bull Lento 909 - 2.03 lactations, 10177 kg of milk, respectively, the worst.