Evaluation of different bivoltine pure silkworm breed for cocoon and associated parameters under Uttar Dinajpur agro climatic conditions west Bengal, India

Tanmay Chowdhury

Authors

Tanmay Chowdhury Department of Sericulture, Raiganj University, Raiganj, Uttar Dinajpur, West Bengal, India

Keywords:

BCon1, BCon4, SK6, SK7, Raiganj, Uttar Dinajpur

Abstract

Four pure bivoltine silkworm breeds SK6, SK7, BCon1 and BCon4 were evaluated under Uttar Dinajpur agro climatic (Raiganj) conditions West Bengal in two different crop seasons along with their mean performance. The cocoon and associated parameters of the breeds were documented and utilized for analysis of and multiple trait evaluation indexes were valued. The present study revealed that there are considerable variations in the cocoon and associated traits among the studied breeds. However, the breed SK7 found to be the best among studied breed and scored average EI values >50 for the maximum of four individual traits viz., fecundity, single cocoon weight, shell weight, shell ratio, particularly with respect to overall performance irrespective of seasons.

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