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2006 Fiscal Year Final Research Report Summary

Analysis of the retrotransposons on the W chromosome of the lepidopteran insects

Research Project

Project/Area Number 17580044
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied entomology
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

ABE Hiroaki  Tokyo University of Agriculture and Technology, Graduate School Institute of Symbiotic Science and Technology, Research Associate, 大学院共生科学技術研究院, 助手 (80222660)

Project Period (FY) 2005 – 2006
KeywordsLepidoptera / W chromosome / Retrotransposon / Sex chromosome / Genome / Retroposon / Transposable element / Bombyx mori
Research Abstract

In the silkworm Bombyx mori (female, ZW ; male, ZZ), femaleness is determined by the presence of a single W chromosome, irrespective of the number of autosomes or Z chromosomes. The W chromosome is devoid of functional genes, except the putative female-determining gene (Fem). To understand these interesting features of the W chromosome, it is necessary to analyze the W chromosome at the molecular biology level. To the present, we have identified 12 W-specific RAPD markers, and with the exception of oneRAPD marker, all of the deduced amino acid sequences of these W-specific RAPD markers show similarity to previously reported mino acid sequences of retrotransposable elements from various organism. After constructing a genomic DNA lambda phage library of B.mori we obtained two lambda phage clones, one containing the W-Kabuki RAPD sequence and one contining the W-Samurai RAPD sequence and found that these DNA sequences comprised nested structures of many retrotransposable elements. To further analyze the W chromosome, we obtained 14 W-specific bacterial artificial chromosome (BAC) clones from three BAC libraries and subjected these clones to shotgun sequencing. The resulting assembly of sequences did not produce a single contiguous sequence due to the presence of many retrotransposable elements. Therefore, we coupled PCR with shotgun sequencing. Through these analyses, we found that many long terminal repeat (LTR) and non-LTR retrotransposons, retroposons, DNA transposons and their derivatives, have accumulated on the W chromosome as strata. These results strongly indicate that retrotransposable elements are the main structural component of the W chromosome.

  • Research Products

    (10 results)

All 2007 2006

All Journal Article (9 results) Book (1 results)

  • [Journal Article] FISH analysis of the W chromosome in Bombyx mandarina and several other species of Lepidoptera by means of B. mori W-BAC2007

    • Author(s)
      Yoshido, A. et al.
    • Journal Title

      Journal of Insect Biotechnology and Sericology 76

      Pages: 1-7

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Isolation and characterization of sex chromosome rearrangements generating male muscle dystrophy and female abnormal oogenesis2007

    • Author(s)
      Fujii, T. et al.
    • Journal Title

      Genetica (in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] FISH analysis of the W chromosome in Bombyx mandarina and several other species of Lepidoptera by means of B.mori W-BAC probes.2007

    • Author(s)
      Yoshido, A.et al.
    • Journal Title

      Journal of Insect Biotechnology and Sericology Vol.76

      Pages: 1-7

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Isolation and characterization of sex chromosome rearrangements generating male muscle dystrophy and female abnormal oogenesis in the silkworm, Bombyx mori.2007

    • Author(s)
      Fujii, T.et al.
    • Journal Title

      Genetica (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Translocations as tools for understanding control of sex determination in the silkworm, Bombyx mori.2007

    • Author(s)
      Abe, H., Fujii, T.
    • Journal Title

      NOVA Science Publishers, Inc., New Research on Genetic Translocations (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The female-killing chromosome of the silkworm, Bombyx mori, was generated by translocation between the Z and W chromosomes2006

    • Author(s)
      Fujii, T. et al.
    • Journal Title

      Genetica Vol. 127

      Pages: 253-265

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 昆虫の雌に引き起こされる雄の交尾行動 : カブトムシ、カミキリムシ、カイコなどの例2006

    • Author(s)
      阿部広明ら
    • Journal Title

      日本性科学会雑誌 24巻

      Pages: 7-16

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The female-killing chromosome of the silkworm, Bombyx mori, was generated by translocation between the Z and W chromosomes.2006

    • Author(s)
      Fujii, T.et al.
    • Journal Title

      Genetica Vol.127

      Pages: 253-265

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Elicitation of male mating behavior in female in insect : The cases of Japanese horned beetle, long-homed beetle, a silkworm and other.2006

    • Author(s)
      Abe, H.et al.
    • Journal Title

      Jananese Journal of Sexual Science Vol.24

      Pages: 7-16

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] New Research on Genetic Translocations2007

    • Author(s)
      Abe, H., Fujii, T.
    • Publisher
      NOVA Science Publishers, Inc.(in press)
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2008-05-27  

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