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ITS sequence data resolve higher level relationships among the eucalypts


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Steane, DA, McKinnon, GE, Vaillancourt, RE and Potts, BM 1999 , 'ITS sequence data resolve higher level relationships among the eucalypts' , Molecular Phylogenetics and Evolution, vol. 12, no. 2 , pp. 215-223 , doi: 10.1006/mpev.1999.0612.

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Sequences of the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA were obtained for 35 species of Eucalyptus s.s. and seven taxa representing five outgroup genera (Allosyncarpia, Angophora, Arillastrum, Corymbia, and Stockwellia). The sequences were analyzed cladistically. The data distinguished clearly between the two major subgenera of Eucalyptus s.s. (Symphyomyrtus and Monocalyptus) but indicated that subgenus Eudesmia may be paraphyletic. ITS sequence data demonstrated the potential to resolve relationships between sections within subgenus Symphyomyrtus. Within sections, however, taxa were poorly differentiated. At the generic level, Corymbia appeared to be paraphyletic due to the exclusion of Angophora. The positions of Allosyncarpia and Arillastrum relative to the ingroup remain unresolved. ITS sequence data may prove valuable for resolving other phylogenetic relationships at higher taxonomic levels within Eucalyptus.

Item Type: Article
Authors/Creators:Steane, DA and McKinnon, GE and Vaillancourt, RE and Potts, BM
Journal or Publication Title: Molecular Phylogenetics and Evolution
ISSN: 1055-7903
DOI / ID Number: 10.1006/mpev.1999.0612
Additional Information:

BM Potts. The definitive version is available online at

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