Studies of some economic traits of multi × bivoltine hybrids of mulberry silkworm, Bombyx mori, L, through rearing under rain fed condition for commercial exploitation in the agro climatic condition of Assam, India Senapati M D1,*, Hazarika A K2 1Central Muga Eri Research & Training Institute, Central Silk Board, Jorhat, India 2Department of Zoology, Cotton College, Guwahati, India *Corresponding author: mamoni.csb@gmail.com
Online published on 2 July, 2012. Abstract One mulberry silkworm breed viz. PM × CSR2 (EIV 53.01) has been identified as the most promising breed for commercial exploitation amongst four multi × bi hybrids namely MC1 × BC4, MC4 × BC4, N × NB4D2 and PM × CSR2 evaluated under agro climatic condition of North Eastern region of India. In India, in recent times, the Evaluation index method for a particular trait or character is widely used by the silkworm breeders and a cumulative score of all the characters ranks the hybrids based on higher score. The sum of index values with regard to all the characters allotted to an hybrid indicates the hybrid's worth. During the present study, by employing the Evaluation index method six bivoltine hybrids were evaluated based on their performance at 24±3°C and 25±5°C and 79±2% relative humidity. The hybrids were ranked as per the cumulative score and the value of a particular trait in a particular hybrid were compared with the ranking. Top Keywords Multi × Bi hybrids, Bombyx-mori mulberry silkworm, promising, rearing. Top |