相模灘沿岸におけるワダンの系統分類,生物地理に関する研究 Phylogenetic and Biogeographic Study of Crepidiastrum platyphyllum (Compositae) in the Coastal Area of the Sagami Sea, Japan

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Author(s)

Abstract

ワダン(アゼトウナ属、キク科)と近縁とされるアゼトウナ属2種とのITS領域を用いた系統解析,そしてワダンの分布についての調査を行なった.系統解析の結果,ワダンをホソバワダンの変種とする取扱いは支持されなかった.標本調査及び現地調査の結果,ワダンの分布に関して,最北は千葉県一ノ宮,最南は東京都鳥島であり,本州の最南は静岡県下田であることが本標本調査によって示され,千葉県一ノ宮と静岡県下田ではワダンの個体群は絶滅した可能性が高いことが本現地調査で示唆された.

Phylogenetic relationships of Crepidiastrum platyphyllum to allied species and its distribution pattern were investigated in the present study. The phylogenetic analysis based on the internal transcribed spacer region (ITS) at nuclear suggests that C. platyphyllum cannot be treated as a variety of C. lanceolatum but should be given species rank. Herbarium surveys revealed the northernmost limit of C. platyphyllum was Ichinomiya, Chiba Prefecture; the southernmost limit in Honshu was Shimoda, Shizuoka Prefecture; and the southernmost limit in Japan was Tori-shima, Tokyo. The present field surveys suggest that the populations of C. platyphyllum recorded previously in Ichinomiya and Shimoda were probably extinct.

Journal

  • Memoirs of the National Science Museum

    Memoirs of the National Science Museum 42, 59-66, 2006

    National Science Museum

Codes

  • NII Article ID (NAID)
    110005998887
  • NII NACSIS-CAT ID (NCID)
    AN00379635
  • Text Lang
    ENG
  • Article Type
    特集
  • ISSN
    00824755
  • NDL Article ID
    8072599
  • NDL Source Classification
    ZU19(書誌・図書館・一般年鑑--学術一般・博物館)
  • NDL Call No.
    Z21-208
  • Data Source
    NDL  NII-ELS 
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