Exterior and intensity of the growth of cross-breed ewes F1 derived from the crossing of ewes of the Tsigai breed with the rams of the meat breeds

UDC 636.37.064:636.082.26

DOI:10.31521/2313-092X/2019-1(101)-13

I. Slyusarenko

 

        Тhe exterior parameters, the intensity of ewes growth from birth to the age of one year derived from the crossing of the Tsigai breed ewes with the rams of the Hissar breed and the merinolandshaf were studied.
       The work was carried out on the heads of the cross-breed ewes of the first generation derived from the crossing of the ewes of the Tsigai breed with rams of the Hissar and merynolodshaf breeds. For this purpose, two groups of ewes were formed with 20 heads in each, depending on the breed of the father. The ewes of both groups were grown in the same conditions of retention and feeding. In the ewes the average daily gain was determined and the exterior was evaluated by taking measurements of body items by measuring method and determining the indices of body structure according to generally accepted methods.As a result of the studies, it was found that cross-breed ewes up to the age of one year derived from the Hissar and Merino-Landshaf sheep and the Tsigai breed ewes had an exterior characteristic of sheep of meat-wool production, good viability and growth energy, and an average daily growth predominated (Tsigai x merino-landshaf) of the same age by 9.0 g or by 7.7% (P> 0.999).They also, in comparison with the ewes of the same age, from the ram of the Merinoladshaf, were more long-legged, with a longer trunk and circumference of chest and more large-headed and massive, and by the main measurements of body items their superiority over their peers ranged from 8.4 to 16.7%.Taking into account that the exterior-constitutional type to some extent predetermines the development of productive qualities of sheep, the study of this connection is relevant and requires further research in subsequent generations of animals.

         Key words: sheep breed, dynamics of average daily growth, the dimensions of the exterior, body structure indices of the local ewes.

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