Development of Bivoltine Double Hybrid of the Silkworm, Bombyx Mori L. Tolerant to High Temperature and High Humidity Conditions of the Tropics
Journal Title: Universal Journal of Environmental Research and Technology - Year 2011, Vol 1, Issue 4
Abstract
Cocoon crop stability with sustainably good performance is a prerequisite to introduce bivoltine races in a tropical country like India under high temperature and humidity stress. Considering the poor performance of productive bivoltine hybrids during summer season, emphasis was given to evolve bivoltine silkworm breeds suitable to tropical conditions for achieving the primary objective of establishing bivoltine sericulture with quality raw silk among sericulturists. In India, it is not conducive to rear highly productive bivoltine hybrids, especially in summer. Therefore, attempts are being made to develop bivoltine silkworm hybrids tolerant to high temperature situations of the tropics. Attempts made earlier on these lines had resulted in the development of robust bivoltine hybrids viz., CSR18 x CSR19, CSR46 x CSR47 and CSR50 x CSR51. However, these hybrids could not make any impact in Indian sericulture industry. Keeping this in view, attempt is being made here to develop bivoltine double hybrid tolerant to high temperature and high humidity conditions of the tropics. The breeding process as well as the comparative performance of the new hybrid with the already developed double hybrid is also discussed in detail. The study has resulted in the development of bivoltine double hybrid tolerant to high temperature and high humidity conditions of the tropics.
Authors and Affiliations
Suresh Kumar N. , Harjeet Singh, Saha A. K. and Bindroo B. B.
Keywords
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