Allozyme diversity and the evolution of Symplocos (Symplocaceae) on the Bonin (Ogasawara) islands [Japan]
1994
Soejima, A. (Osaka Prefectural Univ., Sakai (Japan)) | Nagamasu, H. | Ito, M. | Ono, M.
To study the origin and speciation of plats in oceanic islands, electrophoretic analyses have been done on three endemic species of Symplocos in the Bonin Islands as well as on three other species; S. kuroki, S. nakaharae and S. tanakae which are considered to be closely related to the Bonin endemics. There occur three species: S. kawakamii, S. pergracilis and S. boninensis in Bonin. The genus symplocos 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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