A Bombyx mandarina mutant exhibiting translucent larval skin is controlled by the molybdenum cofactor sulfurase gene

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  • Fujii Tsuguru
    Department of Agricultural and Environmental Biology, Graduate School of Agricultual and Life Sciences, The University of Tokyo
  • Ozaki Masataka
    Department of Agricultural and Environmental Biology, Graduate School of Agricultual and Life Sciences, The University of Tokyo
  • Masamoto Takaaki
    Department of Agricultural and Environmental Biology, Graduate School of Agricultual and Life Sciences, The University of Tokyo
  • Katsuma Susumu
    Department of Agricultural and Environmental Biology, Graduate School of Agricultual and Life Sciences, The University of Tokyo
  • Abe Hiroaki
    Department of Biological Production, Faculty of Agriculture, Tokyo University of Agriculture and Technology
  • Shimada Toru
    Department of Agricultural and Environmental Biology, Graduate School of Agricultual and Life Sciences, The University of Tokyo

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Abstract

During the maintenance of the wild silkworm, Bombyx mandarina, a mutant phenotype exhibiting translucent skin was identified. Based on the crossing experiments with the domesticated silkworm, Bombyx mori, we found that the mutant was controlled by molybdenum cofactor sulfurase (MoCoS) gene. We designated the mutant ‘‘Ozaki’s translucent’’ (ogZ). We found a 2.1-kb deletion containing the transcription initiation site, exons 1 and 2, and the 5' end of exon 3 of the MoCoS gene. The transcript of the MoCoS gene was not detected in the ogZ homozygote. We concluded that ogZ is a complete loss-of-function allele generated by a disruption of the MoCoS gene.<br>

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