Phylogeny and biogeography of Valerianaceae (Dipsacales) with special reference to the South American valerians

TitlePhylogeny and biogeography of Valerianaceae (Dipsacales) with special reference to the South American valerians
Publication TypeJournal Article
Year of Publication2005
AuthorsBell CD, Donoghue MJ
JournalOrganisms Diversity and Evolution
Volume5
Pagination147 - 159
ISSN14396092
KeywordsAndes, biogeography, EVOLUTIONARY BIOLOGY, maximum likelihood, phylogenetic systematics, South America, Valerianaceae
Abstract

Species of Valerianaceae are a common component of the alpine flora throughout the Northern Hemisphere as well as the Andes of South America. Sequence data from three chloroplast markers (psbA-trnH intron, trnK-matK intron, and the trnL-F region) along with the internal transcribed spacer region (ITS) of nuclear ribosomal DNA were used to infer relationships within Valerianaceae. Both genomes, as well as a combined data set, provide support for the major clades within the group and do not support a monophyletic Valeriana. In addition, these data indicate that Plectritis is nested within South American Valeriana, as opposed to being sister to Centhranthus as previously hypothesized. Valerianaceae appear to have originated in Asia, probably in the Himalayas, and subsequently to have dispersed several times to Europe and to the New World. Our results imply that Valerianaceae colonized South America on multiple occasions from the north. In one of these cases there appears to have been a s

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