Abstract
Bombyx mori Densonucleosis virus (BmDV), Bombyx mori Infectious flacherie virus (BmIFV) and Bombyx mori nuclear polyhedrosis virus (BmNPV) infection to silkworms causes major sericulture crop loss. The multi-viral diseases tolerant bivoltine silkworm double hybrid, RDIN1, developed through marker-assisted selection was field evaluated by rearing 20,000 dfls at different location and season. RDIN1, had better pupation (94.8%) compared to control, FC1 X FC2 (91.5%) at farmers’ level with 4 % significant improvement. Average Cocoon yield of RDIN1 (71.2%) was better compared to FC1 X FC2 (69.3%) in unfavourable conditions. Other parameters such as cocoon weight, shell weight, shell percentage, reelability, filament length, raw silk, denier, neatness had also significant difference between RDIN1 and FC1 x FC2. The RDIN1 is expected to reduce cocoon crop losses invariably due to viral infection and fetch more profit to sericulture farmers.
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