Vol. 1 (5) : September-October 2010 issue
Green Farming Vol. 1 (5) : 542-544 (September-October, 2010) (New Series)
Studies on the hybrid vigour in three-way cross bivoltine hybrids of silkworm, Bombyx mori L.
VEERANNA GOWDAa1*, S.K. ASHWATHa2 and G. V. KALPANAb3
aCentral Sericultural Research and Training Institute, Srirampura, Mysore - 570 008 (Karnataka)
bP4, BSF, Devarayapattana, Kandali Post, Hassan - 57 (Karnataka)
Designation : 1,2,3Scientist ‘C’
Subject : Sericulture
Paper No. :
Total Pages : 4
Received :
Revised accepted :
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Citation :
VEERANNA GOWDA, S.K. ASHWATH and G.V. KALPANA. 2010. Studies on the hybrid vigour in three-way cross bivoltine hybrids of silkworm, Bombyx mori L. Green Farming Vol. 1 (5) : 542-544 ; September-October, 2010 (New Series)
ABSTRACT
The study is focused on the hybrid vigour in three- way cross hybrids over their parents. A positive relative heterosis was observed for several quantitative characters such as Cocoon yield/10,000 larvae, Cocoon weight, shell weight, filament length, denier, renditta and neatness over mid parent value and better parent value in most of the hybrids. Among the 23 three-way cross F1 hybrids studied, maximum hybrid vigour for majority of the quantitative traits was expressed by (VO27 x VO3) x VD4 and has been identified to exploit commercially for the increased silk production.
Key words :
Bombyx mori, BPV, Hybrid vigour, MPV , Quantitative traits, Silkworm, Three way cross.
