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Annals of Botany 87: 661-667, 2001
© 2001 Annals of Botany Company

Random Amplified Polymorphic DNA (RAPD) Variation among Populations of the Insular Endemic Plant Campanula microdonta(Campanulaceae)

S. Oiki+, T. Kawahara, K. Inoue, M. Ohara§ and M. Maki

Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo, 153-8902, Japan Hokkaido Research Center, Forestry and Forest Products Research Institute, Hitsujigaoka, Toyohira, Sapporo, 062-8516, Japan Biological Institute and Herbarium, Faculty of Science, Shinshu University, Matsumoto, Nagano, 390-8621, Japan Biological Institute, Graduate School of Science, Tohoku University, Aoba, Sendai, 980-8578, Japan

Received: 23 October 2000 ; Returned for revision: 20 November 2000 . Accepted: 29 January 2001

RAPD variation was examined in nine populations of Campanula microdonta Koidz., endemic to the Izu Islands, Japan. Ninety-eight bands were obtained for all populations, 94% of which were polymorphic at least within a population. Shannon's H values were calculated; these have frequently been used in RAPD studies to estimate genetic diversity. The values within populations did not correlate with the allozyme gene diversity estimated by a previous study or with distance from the Japanese mainland. The possible reasons for this discrepancy are different selection regimes between the two markers, higher RAPD mutation rates, and each marker's different coverage of genomes. Cluster analysis of genetic similarities suggested that colonization of each island probably occurred once, except for Miyake Island, where immigration has occurred at least twice. Copyright 2001 Annals of Botany Company

AMOVA, Campanula microdonta Koidz., insular endemic plant, genetic diversity, population genetic structure, RAPD


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