Vol. 11, Special Issue 3 (2022)

Author(s):
Vinod Singh and Rubia Bukhari

Abstract:
Two bivoltine silkworm (Bombyx mori L.) breeds (NB₄D₂ and SH₆) were tested for their performance in respect of 19 metric traits during autumn season; these breeds were reared at RSRS (Regional Sericulture Research Station) Miran Sahib Jammu in order to evaluate the performance of silkworm breeds in Jammu region. Nineteen metric traits viz., The data pertaining to 19 metric traits viz., Double cocoon percentage, Mute cocoon percentage, Flimsy cocoon percentage, Stained cocoon percentage, Deformed cocoon percentage, Average Filament Length, Average Non-breakable Filament Length, Average Denier, Weight of Cocoon Sample (gms), Weight of Reelable Cocoons (gms), Defective Cocoon percentage, Weight of Silk (gms), Weight of Waste (gms), Renditta on Good Cocoons, Renditta on Defective Cocoons, Waste percentage, Raw Silk percentage, Reelability percentage, Neatness percentage were studied and data revealed significant variability between the breeds. Results obtained during rearing of these breeds showed overall performance of the breed NB₄D₂ appears was better over the other one and NB₄D₂ to have potential for commercial exploitation during autumn rearing season.