Basal angiosperm phylogeny inferred from duplicate phytochromes A and C

TitleBasal angiosperm phylogeny inferred from duplicate phytochromes A and C
Publication TypeJournal Article
Year of Publication2000
AuthorsMathews S, Donoghue MJ
JournalInternational Journal of Plant Sciences
KeywordsBiological Sciences, Botany & Plant Sciences

We have extended our studies of angiosperm phylogeny based on a pair of duplicated phytochrome (PHY) genes, PHYA and PHYC. Phylogenetic analyses of sequences from 52 species yield unrooted gene networks in which all of the elements resolved in our previous analysis of 26 species appear. Amborella still emerges as the sister group of all other angiosperms. However, we cannot reject alternative rootings in which water lilies, either alone or in combination with Amborella, are basal. Austrobaileya + Illicium diverges next from the remaining angiosperms. Eudicots and monocots form rather well-supported clades, as do Magnoliales, Laurales, Piperales, and winteroids, but relationships among these major lineages remain uncertain, as do the positions of Chloranthaceae and Ceratophyllum. Magnoliales may be directly linked with Laurales and Piperales with winteroids, but support for these relationships is not strong. Within eudicots, a basal split between ranunculids (Ranunculales, Papaverales)

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