Phylogenetic Relationships and Chromosomal Evolution of Japanese Fimbristylis (Cyperaceae) Using nrDNA ITS and ETS 1f Sequence Data

• YANO OKIHITO

  Department of Mathematical and Environmental System Science, Graduate School of Informatics, Okayama University of Science

• HOSHINO TAKUJI

  Department of Mathematical and Environmental System Science, Graduate School of Informatics, Okayama University of Science

抄録

ITS and ETS 1f sequence data were used to estimate the phylogeny of 19 taxa of Japanese Fimbristylis. This data was supplemented with karyomorphological observations of 15 taxa within this genus. Molecular analyses indicated strong support for monophyly of the genus Fimbristylis including F. ovata (=Abildgaardia ovata). Our results show that the sections Dichelostylis sensu Ohwi (1944), Cymosae (excluding F. pierotii), and Trichelostylis sensu Kern (1974) are monophyletic, but that the sections Trichelostylis sensu Ohwi (1944), Fimbristylis and Dichelostylis sensu Kern (1974) are not. Three major groups were identified in the genus Fimbristylis by karyomorphological data: (1) 2n=10, 20 and 30, and large somatic chromosomes, (2) 2n=16 and 24, and karyotypes consisting of a bimodal arrangement of somatic chromosomes, and (3) 2n=42, 44 and 52, and very small somatic chromosomes. The ancestor of the genus Fimbristylis is thought to have had a basic chromosome number of x=5 and large chromosomes. Chromosomal evolution in the genus Fimbristylis with diffuse centromeric chromosomes may have been affected by both aneuploidization and polyploidization.

収録刊行物

• Acta Phytotaxonomica et Geobotanica

  Acta Phytotaxonomica et Geobotanica 57 (3), 205-217, 2007

  日本植物分類学会

キーワード

• chromosomal evolution
• Cyperaceae
• diffuse centromeric chromosome
• ETS
• Fimbristylis
• ITS
• molecular phylogeny

詳細情報

• CRID: 1390001205268996480
• NII論文ID: 110006318352
• NII書誌ID: AA11586265
• DOI: 10.18942/apg.kj00004622872
• ISSN: 21897042
• ISSN: 13467565
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可