Allozyme diversity and the evolution ofSymplocos (Symplocaceae) on the Bonin (Ogasawara) Islands |
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| Authors: | Akiko Soejima Hidetoshi Nagamasu Motomi Ito Mikio Ono |
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| Institution: | (1) Department of Life Sciences, College of Integrated Arts and Sciences, University of Osaka Prefecture, 593 Sakai, Osaka, Japan;(2) Department of Environment Sciences, Faculty of Integrated Human Studies, Kyoto University, 606-01 Kyoto, Japan;(3) Department of Biology, Faculty of Science, Chiba University, 263 Chiba, Japan;(4) Makino Herbarium, Faculty of Science, Tokyo Metropolitan University, 192-03 Hachioji, Tokyo, Japan |
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| Abstract: | To study the origin and speciation of plants in oceanic islands, electrophoretic analyses have been done on three endemic
species ofSymplocos in the Bonin Islands as well as on three other species;S. kuroki, S. nakaharae andS. tanakae which are considered to be closely related to the Bonin endemics. There occur three species:S. kawakamii, S. pergracilis andS. boninensis in Bonin. The genusSymplocos is one which is considered to be diversified in the Bonin Islands.
Seven enzyme systems presumed to be encoded by 18 loci were examined. The genetic diversity was low in the island species,
as reported in some oceanic island plants of Hawaii and the Bonin Islands. The three endemics share high genetic identities
and they clustered together in the tree drawn by the UPGMA method, suggesting that they are a monophyletic group, that is,
they result from a single introduction. |
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| Keywords: | Allozyme Bonin Islands Oceanic islands Symplocos |
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