Indian Society of Genetics & Plant Breeding

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ESTIMATES OF GENETIC VARIABILITY FOR COMMERCIAL QUANTITATIVE TRAITS AND SELECTION INDICES IN BIVOLTINE RACES OF MULBERRY SILKWORM (BOMBYX MORI L.)

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Genetic variability for economically important quantitative traits and selection indices of
46 bivoltine races of mulberry silkworm (Bambyx maTi L.) were estimated. High values of
heritability along with genotypic and phenotypic coefficient of variations for filament
length, single-shell weight and single- cocoon weight showed that the above characters are
under genetic control. The correlations between single-cocoon weight and single shell
weight as well as single-shell weight and shell ratio were highly significant. The selection
index programme based on discriminant function analysis resulted into five clusters of 10
genotypes with lower index values for utilisation in hybridization and breeding
programmes.
 

Keywords: Genetic variability, quantitative traits, selection index, mulberry silkworm.

Info

Year: 1995
Volume: 55
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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