Systematics Section / ASPT
Tank, David C. , Winkworth, Richard C. , Lundberg, Johannes , Donoghue, Michael J. .
An update on campanulid phylogeny.
Previous phylogenetic studies have strongly supported the monophyly of campanulids, as well as the sister group relationship of Aquifoliales to the remainder of campanulids. However, despite considerable effort, relationships among the three major lineages, Apiales, Asterales, and Dipsacales, have remained unresolved, and the number of unassigned families has increased, effectively creating a deca-chotomy at the base of the core campanulids. In addition, relationships among the basal lineages within each of the major clades of campanulids has remained uncertain. This lack of resolution has hindered studies of morphological evolution and biogeography, as well as the identification of diagnostic morphological synapomorphies for these lineages. Here we provide an update on the phylogenetic relationships of campanulids, based on more than 14 gene regions representing the chloroplast, mitochondrial, and nuclear genomes. Strong support for novel phylogenetic relationships, as well as those that were previously only weakly supported are discussed in relation to earlier phylogenetic hypotheses. With a clearer understanding of relationships within and among the major lineages of campanulids, we address the evolution of several major morphological characters and historical biogeography.
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1 - Yale University, Peabody Museum of Natural History, Botany Division, P.O. Box 208118, New Haven, CT, 06520-8118, USA
2 - Universidade de S„o Paulo, Instituto de BiociÍncias, Departamento de Bot‚nica, Caixa Postal 11461 - CEP 05422-970, S„o Paulo, SP, Brazil
3 - Uppsala University, Department of Systematic Botany, Evolutionary Biology Centre, Norbyvšgen 18D, SE-752 36, Uppsala, Sweden
4 - Yale University, Ecology & Evolutionary Biology and Peabody Museum of Natural History, PO Box 208106, New Haven, CT, 06520-8106, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Lake Erie/Hilton
Date: Monday, July 9th, 2007
Time: 1:45 PM