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Systematic study on the process of speciation, infra-specific differentiation and genomic differentiation of higher plants on the island system with special reference to the Ryukyu Archipelago

Research Project

Project/Area Number 14540644
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 系統・分類
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

SETOGUCHI Hiroaki  Kyoto Univ., Graduate School of Human and Environmental Studies, Associate Prof., 大学院・人間・環境学研究科, 助教授 (70206647)

Co-Investigator(Kenkyū-buntansha) TOKUOKA Toru  Kyoto Univ., Graduate School of Human and Environmental Studies, Assistant Prof., 大学院・人間・環境学研究科, 助手 (90303792)
OGINUMA Kazuo  Kochi Women's University, Faculty of Human Life and Environmental Science, Professor, 生活科学部, 教授 (30106794)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2003: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywordsphytogeography / island system / speciation / chloroplast DNA / chromosome / haplotype / the Ryukyu Islands
Research Abstract

The Ryukyu Archipelago is the product of the repeated formation and division of a landbridge by means of transgression and regression during the Pliocene and Quaternary periods. To reveal the distribution pattern and the degree of specialization, we examined the intraspecific diversification of nucleotide sequences of organelle DNA in Lysimachia mauritiana (Primulaceae). The sequences of two spacer regions distinguish four major haplotypes on the Ryukyu Archipelago, Kyushu and Honshu of Japan. The distribution range of the four haplotypes is well concordant with the geographical boundaries, Kerama and Tokara Gaps on the Ryukyu Islands, the Pacific Ocean side and the Sea of Japan side. The two tectonic gaps have been recognized to be major geographic gaps of the landbridge through the mainland of China, and Taiwan and Kyushu during the Pleistocene. We also examined the somatic chromosome numbers and morphology. The chromosome number from the southern and middle Ryukyu was mainly 2n=18 with six large metacentric chromosomes while 2n=20 from Taiwan and Okinawa Isl., 2n=17 from Okinawa Isl. and 2n=16 from Amamioshima Isl. were also reported. On the other hand, islands of Northern Ryukyu exclusively comprise 2n=20 with four large metacentric chromosomes. Any correlation between cpDNA haplotypes and chromosome numbers was not recognized.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Nakagawa, M., Setoguchi, H.: "Chloroplast DNA polymorphisms and phytogeography of Fallopia japonica (Polygonaceae) in Japanese alpine area."J.Plant Res.. 115(supplement). 27-28 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Oginuma, K., Peng, C.-I.: "Karyomorphology of Taiwanese Begonia (Begoniaceae) : taxonomic implications."J.Plant Res.. 115. 225-235 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Tokuoka, T., Tobe, H.: "Ovules and seeds in Euphorbioideae (Euphorbiceae)."J.Plant Res.. 115. 361-374 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Setoguchi, H., Kajimaru, G.: "Leaf morphology of the rheophyte, Rhododendron indicum f.otakumi (Ericaceae)."Acta Phytotax.Geobot.. 55. 45-54 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Setoguchi, H., Tsutsumi, C., Kyoda, S.: "Phylogeography of Lysimachia mauritiana and Cycas revoluta on the Ryukyu Archipelago"Biol.J.Linnian Soc.. accepted. (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakagawa, M., Setoguchi, H.: "Chloroplast DNA polymorphisms and phytogeography of Fallopia japonica (Polygonaceae) in Japanese Alpine Area."J.Plant Res.. 115(supplement). 27-28 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Oginuma, K., Peng, C.-I.: "Karyomorphology of Taiwanese Begonia (Begoniaceae): taxonomic implications."J.Plant Res.. 115. 225-235 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Tokuoka, T., Tobe, H.: "Ovules and seeds in Euphorbioideae (Euphorbiaceae)."J.Plant Res.. 115. 361-374 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Setoguchi, H., Kajimaru, G.: "Leaf morphology of the rheophyte, Rhododendron indicum f.otakumi(Ericaceae)"Acta Phytotax.Geobot. 55. 45-54 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Setoguchi, H., Tsutsumi, C., Kyoda, S.: "Phylogeography of Lysimachia mauritiana and Cycas revoluta on the Ryukyu Archipelago"Biol.J.Linnian Soc.. (accepted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Setoguchi, H., Kajimaru, G.: "Leaf Morphology of Rheophyte"Acta Phytopaxonomica et Geobotanica. 55(1). 47-56 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Setoguchi, H.: "Phytogeography of Lsyimachia marijuana and Cycas revoluta"Biological Journal of the Linnean Society. (accepted).

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakagawa, M., Setoguchi, H.: "Chloroplast DNA polymorphisms and phytogeography of Fallopia japonica (Polygonaceae) in japanese alpine area"J. Plant Res.. 115 supplement. 27-28 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Oginuma, K., Peng, C.-I.: "Karyomorphology of Taiwanese Begonia (Begoniaceae) : taxonomic implications"J. Plant Res.. 115. 225-235 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Tokuoka, T., Tobe, H.: "Ovules and seeds in Euphorbioideae (Euphorbiaceae)"J. Plant Res.. 115. 361-374 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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