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Effect of Extended Egg Preservation Schedule in Conservation of Mutant Silkworm (Bombyx mori L.) Genetic Stocks in Gene Bank  

Muthulakshmi M. (Central Sericultural Germplasm Resources Centre)
Mohan B. (Central Sericultural Germplasm Resources Centre)
Balachandran N. (Central Sericultural Germplasm Resources Centre)
Sinha R. K. (Central Sericultural Germplasm Resources Centre)
Thangavelu K. (Central Sericultural Germplasm Resources Centre)
Publication Information
International Journal of Industrial Entomology and Biomaterials / v.11, no.2, 2005 , pp. 93-98 More about this Journal
Abstract
Studies on extended egg preservation schedule from 120 days to 180 days was taken up with 20 germplasm accessions of mutant silkworm genetic stocks of Bombyx mori L. Statistical analyses of the data collected over three trials revealed no significant changes both in the qualitative and quantitative traits of the genetic stocks between treatment (6 months egg preservation) and control (4 months egg preservation), except for fifth instar larval duration in TMS-61, TMS-62, TMS64, TMS-31 and TMS-34 shell weight in TMS-62, TMS-64 and TMS-66. Thus, the results indicate that extended schedule of 6 months egg preservation can safely be adopted, which will reduce the cost of conservation and minimize the genetic erosion owing to reduced crop cycle.
Keywords
Bombyx mori; Silkworm; Mutants; Genetic stocks; Cold preservation;
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