日本産キツネノボタン類の交配様式の分化 Differentiation of Breeding Systems in the Ranunculus cantoniensis Group (Ranunculaceae) in Japan

Abstract

日本産キツネノボタン類の交配様式を明らかにするために開花習性,交配実験,P/O比(花粉数と胚珠数の比)を比較した。花弁の開閉運動:キツネノボタン,コキツネノボタン,ケキツネノボタンの花弁は2-3日間,朝開き夕方閉じた。オトコゼリは1度開くとそのまま閉じることはなかった。雌雄生殖器官の成熟時期:キツネノボタンは雌雄同熟,コキツネノボタンとケキツネノボタンは雄性先熟,オトコゼリは雌性先熟であった。自家和合性:4種とも自家和合性を示した。交配様式:キツネノボタン,コキツネノボタン,ケキツネノボタンは主に自家受粉によって,オトコゼリは他家受粉によって種子ができた。この様に,互いに近縁な4種は有性生殖に関連した性質が分化していた。前3種においては自家受粉が生殖隔離を維持している1つの要因であることが考えられる。

Floral behavior, crossability and pollen/ovule (P/O) ratios of four species of the Ranunculus cantoniensis group in Japan were analyzed to clarify their breeding systems. Petals of R. silerifolius, R. chinensis and R. cantoniensis opened and closed daily, while those of R. tachiroei remained continuously open. The timing of maturation of sexual organs diverged variously: R. silerifolius was syngamous, R. chinensis and R. cantoniensis were protandrous, and R. tachiroei was protogynous. Although the four species were self-compatible, it was presumed that the former three species were self-pollinating, while the latter was cross-pollinated. Hybrids between species and cytotypes may be rare in the first three species because of self-pollination.

Journal

Acta phytotaxonomica et geobotanica   [List of Volumes]

Acta phytotaxonomica et geobotanica 49(2), 81-88, 1999-02-28  [Table of Contents]

The Japanese Society for Plant Systematics

References:  17

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Codes

  • NII Article ID (NAID) :
    110003758653
  • NII NACSIS-CAT ID (NCID) :
    AN00118019
  • Text Lang :
    ENG
  • Article Type :
    ART
  • ISSN :
    00016799
  • NDL Article ID :
    4717259
  • NDL Source Classification :
    ZR3(科学技術--生物学--植物)
  • NDL Call No. :
    Z18-64
  • Databases :
    CJP  NDL  NII-ELS 

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