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Reciprocal effect in F-1 hybrids between multivoltine and bivoltine breeds of the silkworm, Bombyx mori L



Reciprocal effect in F-1 hybrids between multivoltine and bivoltine breeds of the silkworm, Bombyx mori L



Indian Journal of Sericulture 45(2): 176-180



Reciprocal effect was studied in F, hybrids involving multivoltine and bivoltine silkworm breeds. Superiority of straight crosses between multivoltine and bivoltine breeds has been shown for cocoon yield 10,000 larvae by weight, cocoon weight, cocoon shell weight, cocoon shell percentage, filament length and raw silk percentage whereas, reciprocal crosses of bivoltine x multivoltine were found superior only in fecundity and shorter larval span. In multivoltine hybrids, characters such as total larval span, yield/10,000 larvae by weight, filament length, reelability, raw silk percentage, denier and neatness did not show any significant difference. In bivoltine hybrids, none of the characters except filament length and denier showed significant difference. Reasons for significant difference in straight and reciprocal crosses between multivoltine and bivoltine breeds have been discussed.

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Accession: 016857881

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