Sukhanov S. Role of genotype and temperature when determining non-specific resistance and productivity of the silkworm

Silkworm races and hybrids. The role of both genetic and ecological factors in the determination of a thermal resistance, the use of exposure to high temperatures with the purpose of forecasting a heterosis effect, non-specific resistance, and productivity, as well as of improving biological indices of rearings Methods of research: The deepening of the knowledge about the heterosis effect; the determination of non-specific resistance level; and the formation of prolonged modifications. A significant contribution of a mate parental genome into the determination of a silkworm thermal resistance level and a modifying effect of rearings on the significance of this level have been revealed. Both the differences between races and hybrids as regards the dynamics of the embryonic development and the role of an ecological background when rearing in the significance of such differences have been determined. A combined use of the thermotesting method has been proposed. For the object under study, the relation bet ween the primary level of the embryonic thermal resistance and modifying effect of temperature has been shown. The degree of a temperature influence on biological indices of the silkworm has been calculated, and a method of the predicted improvement thereof has been proposed