The contribution of highly productive cows to perfection black-motley breed of the Vologda region

Abstract

The article presents studies to determine the breeding value of 100 highly productive cows, taking into account the linear affiliation for 2017, which is a reserve for increasing the productivity of cows of black-and-white breed in the Vologda region. As a result of long - term selection and breeding work, 100 highly productive cows with milk yield of 14164 kg were obtained, which exceeds the average productivity of cows of the black-and-white breed of the Vologda region by 6480 kg, which is 7684 kg of milk for 2017. The research showed that of 100 high-producing cows - 71 head received from 29 sires of domestic breeding and only 29 recordists from 16 sires foreign selection. On average, one bull-producer of foreign selection received 1.8 highly productive cows, domestic selection - 2.4. The leading line of Reflection Sovering 198998 by the number of cows-record - 50 heads out of the 100 best highly productive was revealed. It should be noted that the average record milk yield of daughters of domestic selection of 14188 kg of milk is on the same level with foreign selection - 14103 kg of milk. The best cows are the main breeding material for the production of high-value bulls of domestic selection.