OBTAINING THE MOST VALUABLE INBRED SILKWORM LINES BY COMBINATIONAL ABILITY

Obtaining the most valuable inbred lines in terms of combinational ability is of particular interest in silkworm breeding, because it is by this method that breeders derive the most outstanding breeding material for hybridization. In order to create highly heterotic inbred lines, it is necessary to apply strict selection of inbred lines for viability. As part of the research, four inbred lines F-1, F-2, F-3, F-4 with plus and minus selection for caterpillar viability were obtained from large cocoon breeding lines L-51 and L-48. The increasing effect of heterosis of topcrosses, bottomcrosses and incrosses originating from inbred lines, starting from J4 to J6, indicates the constant formation of high combinational ability as the breeding effect increases on increased and decreased viability of caterpillars

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