Abstract
To ensure the development of sheep breeding in order to obtain high-quality competitive products it is necessary that the pedigree sheep of semi-fine fleeced breeds meet current requirements, be resistant to the specific conditions of breeding and maintenance at sheep enterprises of various forms of ownership and departmental subordination. The paper contains the materials of research aimed at refining zootechnical rules for evaluation of semi-fine wool sheep breeds of the Belarusian selection. Within the framework of studies, a comparative evaluation of the exterior and constitution development of producing sheep was carried out, data on linear and height measurements and live weight were obtained. As a result of the research, the minimum requirements for the performance of semi-fine fleeced sheep breeds of the Belarusian selection were determined and the zootechnical rules for their evaluation were refined.
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