The purpose of the research was to study the frequency of erythrocyte antigens of 9 genetic systems, the number of genotypes and the frequency of alleles in the F-V system in sires of four breeds at the OAO “Barnaulskoe” Bull stud, as well as to establish indices of genetic similarity between them. The characteristics of 138 sires of Black-and-White breed, 103 of Red-and-White, 106 of Simmental and 270 sires of red breeds have been given. 53 antiserums were used in the tests. The high occurrence of blood factors A₂ (system A), B₂, G₂, O₁, Y₂, G’, O’ and Q’ (system B), C₂, E, W, X₂ (system C), H’ (system S) and Z (system Z) in sures of all four breeds ranged from 0,204 (O’ in sires of Red-and-White breed) to 0,825 (X₂ in the same breed). The frequency of the F antigen in all breeds was maximal and varied from 0,874 in sires of Red-and-White breed to 0,981 in sires of red breeds. On the contrary, the occurrence of blood factors B₁, I₁, I₂, P₁, P₂, Q, T₁, T₂, I’, J₂’, K’, P₁’, Y’, B” and R₁ was significantly lower and amounted to 0–0,130 in sires of Black-and–White breed, 0–0,087 in sires of Red-and-White breed, 0–0,094 in Simmental sires and 0,004–0,137 in sires of Red breeds. Sires of red breeds had all 53 antigens, Black-and-White sires did not have 8, Red-and-White sires did not have 11, and Simmental sires did not have 9 blood factors. There were no significant differences in the value of the genetic similarity index between the animals of the four breeds. However, there was a tendency to increase the similarity between the sires of Black-and-White and Simmental breeds on the one hand and the sires Red-and-White breed on the other (r=0,8837 and 0,8765). The least close breeds are Red-and-White and Simmental on the one hand and Red breeds on the other (r=0,8613 and 0,8585). This is also indicated by the occurrence of genotypes and alleles in the F-V genetic system. Thus, significant differences in the number of all genotypes and frequencies of alleles were revealed between sires of Simmental and Red breeds.

At present, poultry farming provides the population with such important food products as meat and eggs. The basis for the success of poultry farming is a rational feed base, since protein and mineral deficiency leads to a decrease in profitability. In the Far East, there are opportunities for using inexpensive waste from processing marine shellfish. This article presents the results of using Japanese Corbicula flour in the feeding of laying hens. Additions of marine origin have antioxidant, radioprotective activity, increase the body’s resistance to diseases, increase the immune system, and improve metabolism. So that, the purpose of our research work was to study the possibility of including these additions in poultry rations. Our research work proved that using of Corbicula Japonica had a positive effect on egg mass, egg production and finally economic indicators.

The characteristic of milk productivity of cows of Holstein and Simmental breeds in LLC “Sibirskaya Niva” in the Maslyaninsky district in the Novosibirsk region has been given. It has been revealed that under the natural and climatic environments of the Western Siberia, when creating favorable conditions for feeding and housing for cows of Holstein and Simmental breeds have sufficiently high milk productivity. It has been found that Holstein first-calf heifers surpassed their Simmental herdmates by 959 kg in milk yield for the first 305 days of lactation under the same conditions of housing and feeding, by 3,1 kg in daily milk yield, by 38,2 kg in milk fat yield, and by 28,3 kg in milk protein yield (P < 0,001). There were no statistically significant differences between animals of Holstein and Simmental breeds in terms of fat and protein content in milk, which amounted to 3,94 and 2,96 % in Holstein breed and 3,97 and 2,98 % in Simmental breed, respectively. Both breeds have shown high milk productivity during the first 3 lactations. Thus, the milk yield of Holstein cows for the first 3 lactation was 6475–9290 kg, Simmental cows it was 5516–7680 kg, fat content was 3,93–3,99 and 3,96–3,97 %, respectively. The protein content in the milk of cows of both breeds did not exceed 3,0 %. High variability has been found in milk yield, yield of milk fat and protein, the coefficient of milk content and duration of lactation, the lowest in the content of protein and fat in milk and live weight. The correlation coefficients between the fat and protein content in milk were generally positive, but did not exceed 0,28. Therefore, breeding in the herd of cows in LLC “Sibirskaya Niva” have to be conducted not only by fat content, but also by protein content in milk.

This article provides an analysis of the exterior of cows by physique indices. The purpose of this work is a comparative study of the exterior of cows of black-and-white, Simmental breeds and their crossbreeds. When comparing the physique indices, it was found that the culled cows of Simmental breed and crossbreeds after fattening had the highest indices: elongation, plumpness, chest, pelvic and massiveness. The results show that cross-breed cows (black-and-speckled x Simmental) are the largest among the breeds. The smallest cows of these represented breeds are black-and-speckled.