Indian Society of Genetics & Plant Breeding

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COMBINING ABILITY ANALYSIS FOR FILAMENT LENGTH AND SOME QUANTITATIVE TRAITS IN BIVOLTINE MULBERRY SILKWORM (BOMBYX MORI L.)

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Seven-parent diallel analysis in bivoltine mulberry silkworm was conducted to study
combining ability in respect of filament length and some quantitative traits. Variances due
to both gca and sca were significant for filament length and effective rate of rearing,
indicating the importance of additive and nonadditive gene effects. The variances due to
reciprocals for filament length, effective rate of rearing, single cocoon weight, and shell
ratio were highly significant possibly due to involvement of cytoplasmic factors in the
inheritance of these traits. The low X low gea cross, }122 X Howlok, showed overall
good specific combination for maximum expression of the traits, indicating overdominant
type of gene action. The parents involved in the best cross belong to closely divergent
clusters
 

Keywords: Bivoltine mulberry silkworm, combining ability, filament length, quantitative traits.

Info

Year: 1994
Volume: 54
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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