THE REPRODUCTIVE ABILITY OF STUD TROTTING MARES OF DIFFERENT CLASSES OF SPEED

Abstract

Recently, there has been observed a reduction in the amount of stud horses, decreasing in the level of reproduction and a tendency towards the irrationality of the stud structure in horse farms. Therefore, the aim of this study was to find out the current state of stud trotters in Ukraine simultaneously with the research of trotting mares reproductive capacity as a response to the inten-sity of racetrack tests. It is shown that stud trotters (Orlov, Russian, French trotting breed) has 26% of the total amount of stud horses in Ukraine at the beginning of 2020. In general, over the last fifteen years, the amount of the Orlov and Russian trotters has decreased by 60-81%. It is detected an irrational structure of the herd in domestic horse breeding of Orlov breed as the share of the mare at the level of 36% is insufficient for prosperous reproduction of the herd. It is set that high effectiveness of racetrack tests of Orlov and Russian trotting mares renders negative influence on their reproduced ability. It is detected the reliable differences of level of nonimpregnation in Orlov and Russian trotting mares of the greatest class of speed and groups with the low results of race-track test.