N. I. Abramova, L. N. Bogoradova, G. S. Vlasova
Vologda scientific center of the Russian Academy of Sciences, ul. Lenina, 14, s. Molochnoe, Vologda, 160555, Russian Federation
Abstract. The aim of the study was to calculate the breeding value of stud bulls, to assess the lines and their compatibility by the method “difference in milk yield of daughters”, developed by scientists of the Northwest Research Institute of Dairy and Grassland Farming. The work was carried out with a herd of 1097 heads of Ayrshire cattle in stud farm “Majsky”, Vologda region, according to the data of breeding and zootechnical accounting on 01.01.2017. The information on the origin and yield of 493 cows was the material for the study. For comparison, we used the results of the evaluation of stud bulls on the quality of offspring for 2012–2017 by the method of “daughters-contemporaries”. The evaluation of the breeding value of stud bulls, lines and their compatibility was carried out by the method of “difference of milk yield of daughters” in the whole herd for the last finished lactation, as the number of cows in the first lactation did not allow to conduct a reliable assessment by this method. This method allowed to carry out the correction of data on any systematic environmental factors: a farm, a department of a farm, the age of cows in lactations, etc. The data was processed using one-factor analysis of variance in Microsoft Excel. The results of the breeding value of stud bulls and the combination of lines were presented in the form of a graph on the rating of milk yield of daughters, which clearly reflected the difference in the evaluation of genealogical structural units. The best lines were revealed: Dik 768 (+333 kg of milk), Komandora 174233 (+327 kg), Urkho Erranta 13093 (+265 kg); the best stud bulls were Hyalyu 233, Kentavr 522, Zinger 418, Kompas 10217 (+932 kg; +894 kg; +529 kg; +427 kg, respectively). For stud bulls with a high rating (from 1 to 9) the estimation by the method “difference of milk yield of daughters” corresponded to the official evaluation. According to the results of the evaluation, it is recommended to carry out a planned assignment of bulls for breeding livestock to obtain a reliable improving effect in the next generation.
Keywords: estimation; stud bulls; lines; combinations of lines; graphic image.
Author Details: N. I. Abramova, Cand. Sc. (Agr.), head of division (е-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); L. N. Bogoradova, senior research fellow; G. S. Vlasova, Cand. Sc. (Biol.), senior research fellow.
For citation: Abramova N. I., Bogoradova L. N., Vlasova G. S. Assessment of Genealogical Structural Units to Assign Stud Bulls for Breeding Livestock of Agricultural Enterprises. Dostizheniya nauki i tekhniki APK. 2019. Vol. 33. No. 4. Pp. 70–73 (in Russ.). DOI: 10.24411/0235-2451-2019-10418.