Associated connection of erythrocitary antigens with characteristics of stallion semen after cryoconservation

Cryopreservation of animal sperm is the most important way to preserve endangered breeds and species. This is of particular relevance in the horse breeding of Russia and Ukraine given the critical decrease in the livestock of pedigree animals to 1.3 million and up to 300 thousand heads, respectively. For example, in Ukraine only 3 out of 12 officially registered breeds have the minimum required number of breeding stallions and mares. Therefore, the increase in the characteristics of stallion sperm and the improvement of the ability to predict the effectiveness of cryopreservation are of great scientific and practical importance. This article presents the results of the studies on the associated dependence of erythrocyte antigens A, C, D and K of the blood groups of horses of Ukrainian selection. The associated relationship of the efficiency of cryopreservation of stallion sperm has been revealed depending on the antigenic characteristics of erythrocytes according to A, C, D, and K blood group systems...