International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Biomolecular Variations in Poly and Bivoltine Strains and Their Hybrids of Bombyx mori during Embryonic Development

  • Chaudhuri, A. (Silkworm Breeding, Genetics and Physiology Laboratory, Central Sericultural Research and Training Institute) ;
  • Roy, G.C. (Silkworm Breeding, Genetics and Physiology Laboratory, Central Sericultural Research and Training Institute) ;
  • Krishnan, N. (Silkworm Breeding, Genetics and Physiology Laboratory, Central Sericultural Research and Training Institute) ;
  • Sengupta, A.K. (Silkworm Breeding, Genetics and Physiology Laboratory, Central Sericultural Research and Training Institute) ;
  • Sen, S.K. (Silkworm Breeding, Genetics and Physiology Laboratory, Central Sericultural Research and Training Institute) ;
  • Saratchandra, B. (Silkworm Breeding, Genetics and Physiology Laboratory, Central Sericultural Research and Training Institute)
  • Published : 2001.06.01
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Abstract

Biometabolic assessment was made in early and late embryonic stage (just before hatching) of one poly, one bi and their hybrids (DP, YPe, DP ${\times} Ype, and YPe ${\times} DP respectively ) of Bombyx mori to observe the racial differences. Protein and nucleic acid (RNA and DNA) concentrations were recorded to be significantly higher in bivoltine breed (YPe) and also in the hybrid than the polyvoltine (DP) strain in both the stages of embryonic development. The single egg weight of polyvoltine race was lower as compared to that of bivoltine and the hybrid studied. Age specific changes in all the biomolecules were evident where protein and RNA concentrations were elevated sharply in prehatched larvae while in case of DNA it was observed to be just reverse. The differences in protein, RNA and DNA composition between breeds and hybrids reflect the racial variations in biometabolic demands responsible for differential growth and development of the breeds and hybrids.

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