Indian Society of Genetics & Plant Breeding

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Genetic variability studies in Eri silkworm (Samia ricini Donovan) of North Eastern Region of India

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Three eri silkworm breeds namely SRI-001, SRI-010 and
SRI-024 have been identified as the most promising for
the agro climatic conditions of North Eastern region of
India. Breed SRI-010 showed the highest cocoon yield
(20.88 kg) followed by SRI-024 (20.01kg) and SRI-001 (18.82
kg). Cocoon yield is positively is correlated with larval
period (0.201), effective rate of rearing (0.302) and
fecundity (0.668) and negatively correlated with cocoon
weight (–0.061), cocoon shell weight (–0.002). Genotypic
co-efficient of variation (GCV) and Phenotypic co-efficient
of variation (PCV) showed closeness for the characters
like ERR, cocoon yield and hatching indicated minimal
influence on the expression of these traits. High
heritability coupled with high genetic advance (GA)
percent mean and high GCV in traits shown in cocoon
yield, hatching percentage and pupal weight.
 

Keywords: Genetic variability, screening, eri silkworm, Samia ricini, north-eastern region

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Year: 2010
Volume: 70
Issue: 1
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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