Vasyl'yeva T. Genotypic and paratypic factors of reproductive ability forming of Thoroughbred and Ukrainian breed female of riding horses

the object of research: Thoroughbred and Ukrainian breed mares; the aim of research: the determination of the influence degree of genotypic and paratypic factors for reproductive ability of Thoroughbred and Ukrainian breed mares and determination the combing ability of breed line combinations in this parameters; methods and instruments of research: zoo technical, biometrical and genetically - mathematic methods; theoretical and practical results: has done the comparatively analysis of genotypic difference of the mares reproductive level with take into account their typical specialty. Came out the quantity evaluation of the genotypic and paratypic factors influence for riding mare's reproductive ability. Has defined ecology-genetic parameters of the mares fertility, has studied the transgression of the breed lines and typical groups in their reproductive ability. Has determinate the general and specific combing ability of the basic breeds lines in their reproductive level. Has determinate the combing ability of the basic breeds lines, so has recommended the best line combinations for the wide using; the subject and the degree of introduction: the results has inculcated at the selection on State South Regional Selection Center of Horse Breeding "Pivdenkonecenter" (Mykolaiv) and at the studying process of "Horse breeding" at KSAU (Kherson) and MSAU (Mykolaiv); the sphere of application: horse breeding stables and farms, studying process.