Immunogenetic characteristics of sires Simmental and Red-and-White breeds in Stud bull farm «Barnaulskoe»

Abstract

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 Simmental and Red-and-White breeds, as well as to establish the index of genetic similarity between them.The characteristics of 106 sires Simmental and 103 Red-and-White breeds in OJSC “Barnaulskoe” Stud bull farm have been given according to the frequency of erythrocyte antigens of 9 genetic systems. 53 antiserums have been used in the tests. The high occurrence of erythrocyte antigens A2 (system A), B2, G2, O1, Y2, G’, O’, and Q’ (system B), C2, E, W, X2 (system C), S1, H’ (system S), and Z (system Z) has been found in the sires of both breeds and ranged from 0,204 (O’) to 0,825 (X2) in Red-and-White bulls. The maximum frequency of the F antigen was and it was 0,874 in Red-and-White and 0,906 in Simmental bulls. On the contrary, the occurrence of blood factors B1, I1, I2, O2, P1, P2, Q, T1, T2, I’, D’, J2’, K’, P1’, P2’, Y’, B”, G”, R1, J, H, U and U’ was signifi cantly lower and amounted to 0–0,107 in Red-and-White sires and 0–0,094 in Simmental sires. Only 42 erythrocyte antigens have been detected in Red-and-White bulls using 53 antiserums, and 44 antigens have been detected in Simmental bulls. The index of genetic similarity between Red-and-White and Simmental sires calculated according to A. S. Serebrovsky was quite high and amounted to 0,8765, which is understandable because the maternal breed when breeding Red-and-White breed was Simmental breed. The number of genotypes and the frequency of alleles in the F-V genetic system also revealed a great similarity between these breeds, a significant difference has been found only in the number of heterozygous animals.