International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Expression of Heterotic Genetic Interaction among Multivoltine Recurrent Backcross/Congenic Lines for Higher Shell Weight of Silkworm, Bombyx mori L.

  • Verma, A.K. (Silkworm Breeding, Genetics and Molecular Biology Laboratory, Central Sericulture Research and Training Institute) ;
  • Chattopadhyay, G.K. (Silkworm Breeding, Genetics and Molecular Biology Laboratory, Central Sericulture Research and Training Institute) ;
  • Sengupta, M. (Silkworm Breeding, Genetics and Molecular Biology Laboratory, Central Sericulture Research and Training Institute) ;
  • Sengupta, A.K. (Silkworm Breeding, Genetics and Molecular Biology Laboratory, Central Sericulture Research and Training Institute) ;
  • Das, S.K. (Silkworm Breeding, Genetics and Molecular Biology Laboratory, Central Sericulture Research and Training Institute) ;
  • Urs, S.Raje (Silkworm Breeding, Genetics and Molecular Biology Laboratory, Central Sericulture Research and Training Institute)
  • Published : 2003.09.01
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Abstract

Manifestation of heterotic genetic interaction was studied in different hybrids made between multivoltine recurrent backcross (RBL)/congenic lines (Con. L) during unfavourable season when temperature and relative humidity are > $30^{\circ}C$ and 86%, respectively. A few number of silkworm race or strain or breed like Nistari (N ＋ p or Np) can sustain the temperature above 3$0^{\circ}C$ and RH above 86%. The present heterosis study screened a hybrid i.e., CB$_{5}$Lm5RBL1M$_{6}$DPC-LmE$^1$RBL and its reciprocal provided heterobeltiotic effect on survival by number and pupation rate at a magnitude of 20% (p < 0.01) and yield by weight of 10% (p < 0.01). Beside all the hybrids expressed heterosis over check - Nistari (N ＋ p) with better quality silk. Therefore, aforesaid hybrid may be useful for utilization at commercial level during adverse seasons of West Bengal.gal.

Keywords

References

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