Toward a resolution of Campanulid phylogeny, with special reference to the placement of Dipsacales

TitleToward a resolution of Campanulid phylogeny, with special reference to the placement of Dipsacales
Publication TypeJournal Article
Year of Publication2008
AuthorsWinkworth RC, Lundberg J, Donoghue MJ
JournalTaxon
Volume57
Pagination53 - 65
ISSN00400262
KeywordsApiales, Asterales, campanulids, character evolution, Dipsacales, EVOLUTIONARY BIOLOGY, phylogeny, PLANT SCIENCES
Abstract

Broad-scale phylogenetic analyses of the angiosperms and of the Asteridae have failed to confidently resolve relationships among the major lineages of the campanulid Asteridae (i.e., the euasterid II of APG II, 2003). To address this problem we assembled presently available sequences for a core set of 50 taxa, representing the diversity of the four largest lineages (Apiales, Aquifoliales, Asterales, Dipsacales) as well as the smaller “unplaced” groups (e.g., Bruniaceae, Paracryphiaceae, Columelliaceae). We constructed four data matrices for phylogenetic analysis: a chloroplast coding matrix (atpB, matK, ndhF, rbcL), a chloroplast non-coding matrix (rps16 intron, trnT-F region, trnV-atpE IGS), a combined chloroplast dataset (all seven chloroplast regions), and a combined genome matrix (seven chloroplast regions plus 18S and 26S rDNA). Bayesian analyses of these datasets using mixed substitution models produced often well-resolved and supported trees. Consistent with more weakly support

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