A. A. Sermyagin, N. A. Zinovieva
Federal Scientific Center of Animal Husbandry – L. K. Ernst All-Russian Research Institute of Animal Husbandry, pos. Dubrovitsy, 60, Podol’skii r-n, Moskovskaya obl., 142132, Russian Federation
Abstract. The purpose of the study was to determine the possibilities of the selection of stud bulls based on their get quality and genomic data using the Russian dairy cattle reference group bred from the populations of animals from Moscow, Leningrad, and Vologda regions. An integral part of the reference group was 591 genotyped bulls from 145 breeding herds that produced a total of 180455 heifers. The test group of young stud bulls consisted of 96 animals. Genomic data, according to which 39051 polymorphisms were selected, were obtained with the application of BovineSNP50 biochip. We used BLUP, GBLUP, and REML approaches. Breeding values were assigned according to standard estimated deviations. The bulls were born in the period from 1986 to 2010. In this period, the genetic trend in the population, based on estimates of breeding values, was positive averaging over the year +32.1 kg of milk, + 0.001% of the fat and protein content, +1.3 kg of milk fat, and +1.0 kg of milk protein. The greatest genetic variation (heritability) was observed for the following criteria: 305 lactation days (0.343), the amount of milk fat (0.344), and the amount of milk protein (0.349). Only every fifth bull with genetic (EBV) and genomic (GEBV) estimates were selected into a group of stud bulls of absolute improver “++” or improver “+” categories. The minimum values of EBV and GEBV were +690 kg and +900 kg of milk, +25 kg and +31 kg of milk fat, +21 kg and +23 kg of milk protein to the population averages, respectively. Using the reference group of animals gathered mainly from the Russian livestock population made it possible to predict with high efficiency the breeding value of young bulls based on their genomic information.
Keywords: genomic assessment of breeding value; stud bull; reference population; selection efficiency.
Author Details: A. A. Sermyagin, Cand. Sc. (Agr.), head of division (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); N. A. Zinovieva, D. Sc. (Biol.), member of the RAS, director.
For citation: Sermyagin A. A., Zinovieva N. A. Genetic and Genomic Prediction of Breeding Values of Russian Black-and-White and Holstein Bulls. Dostizheniya nauki i tekhniki APK. 2019. Vol. 33. No. 12. Pp. 77–82 (in Russ.). DOI: 10.24411/0235-2451-2019-11216.