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Chromosomal differentiation in the Gekko hokouensis species complex (Gekkonidae, Squamata)

Research Project

Project/Area Number 16570085
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Biodiversity/Systematics
Research InstitutionToho University

Principal Investigator

KOUNO Seiichi  Faculty of Science, Professor, 理学部, 教授 (70057644)

Co-Investigator(Kenkyū-buntansha) KUBOTA Souichirou  Faculty of Science, Associate Professor, 理学部, 助教授 (30277347)
OTA Hidetoshi  Tropical Biosphere Research Center, University of the Ryukyus, Professor, 熱帯生物圏研究センター, 教授 (10201972)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsGekko hokouensis / species complex / sex chromosome / chromosome differentiation / chromosome polymorphism / rDNA / ZW型 / ヤクヤモリ
Research Abstract

The Gekko hokouensis species complex (Reptilia: Gekkonidae) consists of G. hokouensis sensu stricto from continental China and several cryptic species, including one broadly distributed species (G. sp. 1), from east Asian islands. Using a few chromosome banding techniques (G, C, and AgNORs), we examined karyotypic variation of this species complex and of several other Japanese congeners. All these species shared the diploid chromosome number (38). Nevertheless, five distinct karyotypes were recognized even within the G. hokouensis species complex. The putative ancestral karyotype (type A), shared by G. hokouensis sensu stricto and another unnamed and apparently distant species outside the species complex, consisted of two large metacentric, ten telo-or acrocentric, three subtelocentric, and four small submeta-or metacentric chromosome pairs. The karyotype shared by the two Taiwanese species of this species complex (G. sp. 1 and G. sp. 3) appeared to have arisen directly from type A through pericentric inversion of an acrocentric chromosome pair (No. 6). The third karyotype (type C1), found in G. sp. 1 from several southern Ryukyu islands, had ZZ/ZW sex chromosomes whose heteromorphism was obscure in Giemsa-stained slides, but evident after G-banding. Its W chromosome appears to have derived through paracentric inversion in one of the homologous pair no. 4 of type B. The fourth karyotype (type C2), found in G. sp. 1 from several islands of the central and northern Ryukyus, exhibited another type of ZZ/ZW system, and appeared to have also derived directly from type B through pericentric inversion in one of the acrocentric pair no. 4. The fifth karyotype (type D), found in the other member of the G. hokouensis species complex from Okinawajima (G. sp. 2), exhibited rearrangements in pairs nos. 5 and 16. It also differed from types C1 and C2 in lacking the hetelomorphic sex chromosomes.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (13 results)

All 2007 2006 2005 2004 2002 Other

All Journal Article (13 results)

  • [Journal Article] ミナミヤモリ種群における染色体変異(第3報)2007

    • Author(s)
      芝池由樹
    • Journal Title

      Chromosome Science (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Chromosomal differentiation in the Gekko hokouensis species complex (Gekkonidae, Squamata)2007

    • Author(s)
      Shibaike, Yuki
    • Journal Title

      Chromosome Science (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] ミナミヤモリ(Gekko hokouensis)における性染色体関連遺伝子の検索2006

    • Author(s)
      芝池由樹
    • Journal Title

      Chromosome Science 9巻・1号

      Pages: 13-13

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Molecular cytogenetic analysis of karyotypic and sex chromosomal differentiation in the Gekko hokouensis species complex (Gekkonidae, Squamata)2006

    • Author(s)
      Shibaike, Yuki
    • Journal Title

      Chromosome Science 9(1)

      Pages: 13-13

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Chromosome differentiation in the Gekko hokouensis species complex (Gekkonidae, Squamata)2005

    • Author(s)
      Kohno, S.
    • Journal Title

      Abstracts of First International Cytogenetics and Genome Society (Granada, ' 05)

      Pages: 81-81

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Chromosomal differentiation in the Gekko hokouensis species complex (Gekkonidae, Squamata)2005

    • Author(s)
      Kohno, Sei-ichi
    • Journal Title

      Abstracts of the First International Cytogenetics and Genome Society (Granada, '05)

      Pages: 81-81

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] ミナミヤモリ種群における染色体変異2005

    • Author(s)
      北川 鈴
    • Journal Title

      爬虫両生類学会誌 2004・1

      Pages: 39-39

    • Related Report
      2004 Annual Research Report
  • [Journal Article] ミナミヤモリ種群における染色体変異2004

    • Author(s)
      北川 鈴
    • Journal Title

      爬虫両棲類学会報 2004巻・1号

      Pages: 39-39

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] ミナミヤモリ種群における染色体変異(第2報)2004

    • Author(s)
      城 宏司
    • Journal Title

      Chromosome Science 8巻・4号

      Pages: 215-215

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Chromosomal differentiation in the Gekko hokouensis species complex (Gekkonidae, Squamata)2004

    • Author(s)
      Kitagawa, Suzu
    • Journal Title

      Bulletin of the Herpetological Society of Japan 2004(1)

      Pages: 39-39

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Chromosomal differentiation in Gekko hokouensis species complex : Karyological evolution and distribution of four types of karyotype2004

    • Author(s)
      Shiro, Hiroshi
    • Journal Title

      Chromosome Science 8(4)

      Pages: 215-215

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Sex chromosome (ZW) differentiation in Gekko hokouensis (Gekkonidae, Squamata)2002

    • Author(s)
      Iiizumi, Ryuji
    • Journal Title

      Chromosome Science 6(4)

      Pages: 114-114

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Sex chromosome(ZW) differentiation in Gekko hokouensis.

    • Author(s)
      Iiizumi, Ryuji
    • Journal Title

      Chromosome Science (印刷中)

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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