Widespread Cytotypic Variation, Cytogeography and Dynamic Analysis of <i>Lysimachia mauritiana</i> (Primulaceae) on Amamioshima, Kakeromajima and Tokunoshima Islands in the Amami Group of the Ryukyu Archipelago, Japan

• Kono Yoshiko

  The Community Center for the Advancement of Education and Research at the University of Kochi

• Hoshi Yoshikazu

  Department of Plant Science, School of Agriculture, Tokai University

• Setoguchi Hiroaki

  Graduate School of Human and Environmental Studies, Kyoto University

• Yokota Masatsugu

  Laboratory of Ecology and Systematics, Faculty of Science, University of the Ryukyus

• Oginuma Kazuo

  The Community Center for the Advancement of Education and Research at the University of Kochi

Abstract

Our continuous investigations revealed that a coastal herb, Lysimachia mauritiana, exhibited a wide-ranging intraspecific karyotypic polymorphism (18 cytotypes) in the Ryukyu Archipelago of Japan. Recently it is suggested that the small island Takarajima including 11 cytotypes showed the highest intraspecific karyotypic diversity both within and among populations in the Ryukyus. To explore karyotypic variations on its adjacent three islands, Amamioshima, Kakeromajima and Tokunoshima, karyomorphological and cytogeographical analyses were conducted in 452 individuals from 27 localities throughout the islands. A total of five different chromosome numbers (2n=16, 17, 18, 19, 20) and 15 cytotypes were recognized in the area. Except for two, two to six cytotypes coexisted in every locality. The islands showed different dominant cytotypes, i.e. 16 (6m) in Amamioshima Is., unknown in Kakeromajima Is. and 18 (6m) in Tokunoshima Is. Furthermore, it is suggested that cytotypes in northeast area in Amamioshima Is. might be converged to 16 (6m) in the near future by dynamic analyses in cytotype.

Journal

• CYTOLOGIA

  CYTOLOGIA 80 (2), 193-202, 2015

  Japan Mendel Society, International Society of Cytology

Keywords

• Amamioshima Island
• Kakeromajima Island
• Tokunoshima Island
• Cytogeography
• Cytotypic variation
• Dynamic analysis
• <i>Lysimachia mauritiana</i>
• Ryukyu Archipelago of Japan

Details

• CRID: 1390001204108977536
• NII Article ID: 130005074304
• DOI: 10.1508/cytologia.80.193
• ISSN: 13487019
• ISSN: 00114545
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed