Phylogenetic relationships withinPelargonium sect.Peristera (Geraniaceae) inferred from nrDNA and cpDNA sequence comparisons |
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| Authors: | Freek T Bakker Dorothea Hellbrügge Alastair Culham Mary Gibby |
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| Institution: | (1) Department of Botany, School of Plant Sciences, The University of Reading, RG6 6AS, UK;(2) Institut für Botanik, Westfälische Wilhelms-Universität, Schloßgarten 3, D-48149 Münster, Germany;(3) Department of Botany, Natural History Museum, SW7 5BD London, UK |
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| Abstract: | Phylogenetic analysis of nrDNA ITS and trnL (UAA) 5 exon-trnF (GAA) chloroplast DNA sequences from 17 species ofPelargonium sect.Peristera, together with nine putative outgroups, suggests paraphyly for the section and a close relationship between the highly disjunct South African and Australian species of sect.Peristera. Representatives fromPelargonium sectt.Reniformia, Ligularia s. l. andIsopetalum (the St. Helena endemicP. cotyledonis) appear to be nested within thePeristera clade. The close relationship between the South African and AustralianPeristera is interpreted as being caused by long-range dispersal to Australia, probably as recent as the late Pliocene. |
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| Keywords: | Geraniaceae Pelargonium Peristera Phylogeny rDNA ITS trnL-F longrange dispersal South Africa Australia St Helena Tristan da Cunha |
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