| The value of sampling anomalous taxa in phylogenetic studies: major clades of the Asteraceae revealed. | |
| | |
MedLine Citation:
|
PMID: 18375151 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The largest family of flowering plants Asteraceae (Compositae) is found to contain 12 major lineages rather than five as previously suggested. Five of these lineages heretofore had been circumscribed in tribe Mutisieae (Cichorioideae), a taxon shown by earlier molecular studies to be paraphyletic and to include some of the deepest divergences of the family. Combined analyses of 10 chloroplast DNA loci by different phylogenetic methods yielded highly congruent well-resolved trees with 95% of the branches receiving moderate to strong statistical support. Our strategy of sampling genera identified by morphological studies as anomalous, supported by broader character sampling than previous studies, resulted in identification of several novel clades. The generic compositions of subfamilies Carduoideae, Gochnatioideae, Hecastocleidoideae, Mutisioideae, Pertyoideae, Stifftioideae, and Wunderlichioideae are novel in Asteraceae systematics and the taxonomy of the family has been revised to reflect only monophyletic groups. Our results contradict earlier hypotheses that early divergences in the family took place on and spread from the Guayana Highlands (Pantepui Province of northern South America) and raise new hypotheses about how Asteraceae dispersed out of the continent of their origin. Several nodes of this new phylogeny illustrate the vast differential in success of sister lineages suggesting focal points for future study of species diversification. Our results also provide a backbone exemplar of Asteraceae for supertree construction. |
| | |
Authors:
|
Jose L Panero; V A Funk |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2008-03-28 |
Journal Detail:
|
Title: Molecular phylogenetics and evolution Volume: 47 ISSN: 1055-7903 ISO Abbreviation: Mol. Phylogenet. Evol. Publication Date: 2008 May |
Date Detail:
|
Created Date: 2008-04-28 Completed Date: 2008-07-18 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9304400 Medline TA: Mol Phylogenet Evol Country: United States |
Other Details:
|
Languages: eng Pagination: 757-82 Citation Subset: IM |
Affiliation:
|
Section of Integrative Biology, 1 University Station, A6700, 141 Patterson Building, University of Texas, Austin, TX 78712, USA. panero@mail.utexas.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Asteraceae
/
classification*,
genetics* Bayes Theorem Consensus Sequence Gene Deletion Geography Models, Genetic Mutagenesis, Insertional Phylogeny* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The human progesterone receptor shows evidence of adaptive evolution associated with its ability to ...
Next Document: Management of hypertension in peripheral arterial disease: does the choice of drugs matter?