Immunogenetic characteristics of the sheep of the transbaikal brew of a different direction of productivity
The article presents the results of immunogenetic certification of fine-fleeced sheep of Transbaikalian breed, depending on the direction of productivity for six blood group systems, including 14 antigenic factors. The analysis of the immunogenetic blood indices revealed the similarity of wool-meat and flesh-sheep to the antigenic factors Bb, Bg, Ca, Cb, R and O and a significant divergence in antigens Aa, Ab, Be and Bi. Wool and meat sheep are characterized by a high incidence of Bb (0.980), Bi (0.873), Ca (0.932), Ma (0.555), R (0.538) and O (0.910) - erythrocyte antigens. Animals with antigens Bd, Be, Bg and Mb (0.150, 0.278, 0.190 and 0.228) are less common. A high concentration of antigens Bb, Be, Ca, Ma, R, O and Da (0,960, 0,743, 0,782, 0,812, 0,554, 0,713 and 0,505) was detected in meat-sheep, a low frequency of occurrence was observed in carrier animals Aa (0.119), Ab (0.109), Bd (0.089), Bi (0.109), Bg (0.129) and Mb (0.149). In the case of woolly meat sheep, antigens Aa, Ab, Bi, Ca and O (P<0.001) are significantly more common, whereas meat-beeted individuals have a higher concentration of Be, Ma and Da (P<0.001). The degree of genetic similarity and genetic distance between individuals within the breed was 0.652 and 0.428, respectively.