International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Identification of Superior Polyvoltine Hybrids (polyvoltine${\times}$bivoltine) of Silkworm, Bombyx mori L.

  • Rao, C.G.P. (Andhra Pradesh State Sericulture Research & Development Institute) ;
  • Chandrashekharaiah (Andhra Pradesh State Sericulture Research & Development Institute) ;
  • Basha, K.Ibrahim (Andhra Pradesh State Sericulture Research & Development Institute) ;
  • Seshagiri, S.V. (Andhra Pradesh State Sericulture Research & Development Institute) ;
  • Ramesh, C. (Andhra Pradesh State Sericulture Research & Development Institute) ;
  • Nagaraju, H. (Andhra Pradesh State Sericulture Research & Development Institute)
  • Published : 2004.03.01
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Abstract

Ten promising polyvoltine mulberry silkworm strains(SDMGl, SDMG2, SDMG3, SDMG4, SDMWl, SDMW2, RMWl, RMW2, RMW3 and RMW4) that are superior in quantitative and qualitative traits have been synthesized in the polyvoltine breeding laboratory of Andhra Pradesh State Sericulture Research ＆ Development Institute, Hindupur through systematic hybridization and appropriate selection methods. After the genotypes were found homozygous for the desired traits, they have been crossed with 3 bivoltine testers $(APS8, APS4 and {NB_2}{D_4})$ and thirty new hybrid combinations were developed for the assessment of their hybrid performance. Phenotypic expressions of economically important quantitative and qualitative traits of fist filial generation were measured and subjected for statistical analysis. Evaluation Index and Subordinate Function methods were employed for the assessment of hybrid performance since they are widely used in silkworm hybrid evaluation. Total of seven poly${\times}$bivoltine combinations, which ranked high in both the methods, were selected as potential combinations for further field test. These combinations also ranked significantly higher than the control hybrid (APMl${\times}$APS8).

Keywords

References

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