Breeding of two Bivoltines, A3$\times$935E and A3$\times$916B of Silkworm Bombyx Mori L. for Higher Survival and Moderate Silk Productivity

  • Begum, A.Naseema (Central Sericuttural Research and Training Institute) ;
  • Ahsan, M.M. (Central Sericuttural Research and Training Institute) ;
  • Datta, R.K. (Central Sericuttural Research and Training Institute)
  • Published : 1999.09.01

Abstract

Twelve pure silkworm lines identified based in higher G.C.A values from a line${\times}$Tecter crossing programme, were crossed with twelve breeds showing cocoon shell ratio>22% and hybrids prepared, evaluated in a Multiple index method. Seven hydrids showing average index value>50 in all the 10 economic characters were seclcted and evaluated in the laboratory. However, two hybrids viz., A3${\times}$935E and A3${\times}$916B were finally selected based on the superiority of the breeds in one day shorter larval duration and with and with higher reeling characters compared to control KA${\times}$NB4D2. The breeding procedure involed in evolution hybrids are discussed.

Keywords

References

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