Higher-level relationships among the eucalypts are resolved by ITS-sequence data
By Dorothy Steane, D. Nicolle, G. Mckinnon, R. Vaillancourt, Brad M. Potts. 2002
127 citations recorded by the source corpus.
This expanded survey of ITS sequences represents the largest analysis of molecular data ever attempted on Eucalyptus. Sequences of the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA were included in an analysis of 90 species of Eucalyptus s.s. and 28 species representing eight other genera (Allosyncarpia, Angophora, Arillastrum, Corymbia, Eucalyptopsis, Stockwellia, Lophostemon and Metrosideros). The results of the study indicate that Angophora and Corymbia form a well-supported clade that is highly differentiated from Eucalyptus s.s. Corymbia species are divided between two clades, one of which may be the sister to Angophora. Allosyncarpia, Arillastrum, Eucalyptopsis and 'Stockwellia' are also highly differentiated from Eucalyptus s.s. If the genus Eucalyptus is to be expanded to include Angophora and Corymbia (sensu Brooker 2000), ITS data suggest that Allosyncarpia, Eucalyptopsis, 'Stockwellia' and potentially Arillastrum should also be included in Eucalyptus s.l. The ITS data suggest that subg. Symphyomyrtus is paraphyletic and that subg. Minutifructus should be included within it. Within subg. Symphyomyrtus, only sect. Maidenaria appears to be monophyletic. Sections Adnataria and Dumaria are probably monophyletic; sections Exsertaria and Latoangulatae are very close and probably should be combined in a single section. Section Bisectae is polyphyletic and is divided into two distinct lineages. The phylogenetic groups depicted by ITS data are consistent with the frequency of natural inter-specific hybridisations as well as data from controlled crosses within subgenus Symphyomyrtus. The ITS data illustrate that subg. Idiogenes and western Australian monocalypts are early evolutionary lines relative to E. diverstfolia, E. rubiginosa (monotypic subg. Primitiva) and the eastern monocalypts and that subg. Primitiva should be sunk into subg. Eucalyptus. Subgenus Eudesmia may be monophyletic, grouping with subgenera Idiogenes and Eucalyptus. Further work is required to confirm the phylogenetic positions of the monotypic subgenera Alveolata, Cruciformes, Acerosae and Cuboidea.
Subfields: Cell Biology, Ecology, Evolution, Behavior and Systematics
View Paper: https://www.semanticscholar.org/paper/2d67b8996fc676be0dd74b8901b9b6d0bdb0ecd1
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Citations in the corpus
- Relationships within Myrtaceae sensu lato based on a matK phylogeny (2005, background): “Fewer representatives were used when suprageneric groupings seemed reasonably well established by other in-depth studies (e.g. Brown et al. 2001, Lam et al. 2002, O’Brien et al. 2000, Steane et al. 2002).”
- Australian biogeographical connections and the phylogeny of large genera in the plant family Myrtaceae (2003, background): “raveretiana) is in a clade that is either the sister group to or basal within the large and species-rich subgenus Symphyomyrtus (300þ species) (Ladiges et al., 1995; Steane et al., 2002).”
- A dated molecular perspective of eucalypt taxonomy, evolution and diversification (2019, methodology): “…approaches have been employed to deduce the relationship of groups among and within the eucalypts (Johnson 1972; Ladiges et al. 1995, 2003; Udovicic et al. 1995; Steane et al. 1999, 2002; Whittock et al. 50 2003; Crisp et al. 2004, 2011; Parra-O et al. 2006; Gibbs et al. 2009; Bayly et al. 2013).”