Speciation process of Emphasis Type="Italic"Salv

Authors: Sudarmono Hiroshi Okada

Publish Date: 2007/05/17

Volume: 120, Issue: 4, Pages: 483-490

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Abstract

To understand the speciation process of Salvia isensis Lamiaceae a species endemic to a special environment serpentine areas in the IseTokai district central Honshu Japan chloroplast DNA cpDNA and nuclear ribosomal DNA nrDNA were employed to analyze the phylogenetic relationships of S isensis with related species in Japan Allozymic polymorphisms were also used to analyze genetic relationships among Salvia species A contradiction in the phylogenetic positions of species studied was detected when phylogenetic trees were constructed using cpDNA or nrDNA ie S isensis was a sister to the other species in phylogenetic trees generated from cpDNA while S japonica was a sister to the other species in the case of nrDNA Genetic relationships between Salvia species estimated from allozymic polymorphisms did not contradict to the topology for nrDNA Using the present results the speciation process of S isensis is discussed with regard to introgressive gene exchanges between related speciesWe wish to express our gratitude to Dr MN Tamura Botanical Gardens Osaka City University and Dr J Yamashita Okayama University for comments on this manuscript and to Prof Dr H Tsukaya University of Tokyo Dr G Seto Osaka Museum of Natural History Ms S Onoue Kashiwara city and Mr M Horiuchi Katano city for their help in obtaining materials to Prof Dr M Kato University of Tokyo for permission to use facilities to Dr Y Kita University of Tokyo for technical help and to Mr H Yamada for his technical support using PAUP We also acknowledge anonymous reviewers for valuable comments to improve this manuscript

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