Authors: N. V. FOMINA, candidate of agricultural sciences, associate professor, South Ural State Agrarian University (13 Gagarina Str., 457100, Troitsk; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.), O. G. LORETZ, doctor of biological sciences, associate professor, O. A. BYKOVA, doctor of agricultural sciences, associate professor, Ural State Agrarian University (42 K. Liebknekhta Str., 620075, Ekaterinburg; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Keywords: beef cattle, productivity, young stock, selection and genetic parameters.
Abstract: The article presents the material on the productive qualities of young Aberdeen-Angus breed of different origin on the basis of an assessment of their live weight and average daily gain of live weight taking into account selection and genetic param- eters, with further practical application. It was established that Aberdeen-Angus gobies and calves from the manufacturing bulls RENNYLEA P183, RAFF DORIS S128 and MURDEDUKE FACET F16 at birth had mostly no significant differences in live weight between groups. This figure ranged from 25.2 to 27.3 kg – in bulls and from 25.2 to 27.3 kg – in heifers, respec- tively. Bull-calves at the age of 18 months exceeded the standard of the 1st class of the standard of the breed in live weight by 48.6; 60.9 and 30.8 kg, and chicks – by 57.3; 69.4 and 51.8 kg respectively. Sex influenced the dynamics of weight growth, and the degree of manifestation of the genotype was more pronounced in bulls and heifers of group II. This group of young animals is characterized by a high intensity of muscle mass accumulation. The average average growth rate from weaning to 18 months in young animals of group II, respectively, was 852.4 g in bulls and 664.9 g in chaffers, which is higher from 1.09 to 8.2 % than in analogs of groups I and III. The maximum level of the studied indicator corresponded to the growth period in heifers from the 7th to the 12th, and in the bulls from the 12th to the 15th months. In terms of the variability of live weight and average daily gain in live weight, gobies and heifers of group II were superior to their peers, which guarantees the selection of medium animals with a large selective differential. The best reproductive abilities were characterized by heifers of group II. Earlier, from 18 to 30 days they were fruitfully found and from 17.3 to 30.1 days they relieved in comparison with chicks of groups I and III. The use of the RENNYLEA P183, RAFF DORIS S128 and MURDEDUKE FACET F16 Aberdeen-Angus bulls makes it possible to get good slaughter qualities of the offspring.
