Geographical Distribution of Sexual and Apogamous Types of <i>Dryopteris formosana </i>and <i>Dryopteris varia </i>(Dryopteridaceae) in Taiwan

• Hori Kiyotaka

  Makino Herbarium, Tokyo Metropolitan University

• Kuo Li-Yaung

  Institute of Ecology and Evolutionary Biology, National Taiwan University

• Chiou Wen-Liang

  Division of Botanical Garden, Taiwan Forestry Research Institute

• Ebihara Atsushi

  Department of Botany, National Museum of Nature and Science

• Murakami Noriaki

  Makino Herbarium, Tokyo Metropolitan University

抄録

Cytological observations of the mitotic chromosomes of Dryopteris formosana and D. varia (Dryopteridaceae) in Taiwan are reported. Only the triploid apogamous cytotype has been reported from D. formosana. This is the first report of a diploid sexual type of D. formosana. Counts of spore numbers per sporangium of herbarium specimens to presume the reproductive mode in these two species revealed that both sexual and apogamous types of D. formosana and D. varia are widely distributed in Taiwan. Although the sexual type of D. formosana occurs at relatively lower elevations than the apogamous type, such differentiation between cytotypes was not observed in D. varia. It is important to understand diploid sexual types to be able to explain variation in apogamous species, because sexual cytotypes should be the source of the variation observed in apogamous cytotypes.

収録刊行物

• Acta Phytotaxonomica et Geobotanica

  Acta Phytotaxonomica et Geobotanica 68 (1), 23-32, 2017-02-28

  日本植物分類学会

キーワード

• apogamy
• sexual cytotype
• Dryopteridaceae
• <i>Dryopteris formosana</i>
• <i>Dryopteris varia</i>
• reproductive mode
• chromosome number

詳細情報

• CRID: 1390282680247084416
• NII論文ID: 130005612094
• DOI: 10.18942/apg.201612
• ISSN: 21897042
• ISSN: 13467565
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可