Document Detail


Hybrid genera in Liatrinae (Asteraceae: Eupatorieae).
MedLine Citation:
PMID:  21292016     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Liatrinae is a small subtribe of Eupatorieae that occurs in North America with a center of generic level diversity in the southeastern United States. Molecular phylogenetic data were sought to assess whether two monotypic genera, Garberia and Hartwrightia, are accurately placed in the subtribe, and to resolve questions of the generic level classification of Carphephorus. Phylogenetic analyses of nuclear ITS/ETS and plastid DNA data indicated that Garberia is the basalmost diverging lineage, and that Hartwrightia is phylogenetically embedded in the subtribe. There was significant incongruence between the ITS/ETS and plastid DNA datasets in the placement of Hartwrightia and another monotypic genus, Litrisa, suggesting that both are of original hybrid origin. The results also showed that Carphephorus s.l. is not monophyletic, and even after removal of the two species of Trilisa, it is still paraphyletic to Liatris. The apparent hybrid origin of Hartwrightia, which is morphologically transgressive relative to its inferred parental lineages, suggests that reticulation between phylogenetically distinct lineages may be a recurrent problem for phylogenetic estimation in Asteraceae.
Authors:
Edward E Schilling
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-31
Journal Detail:
Title:  Molecular phylogenetics and evolution     Volume:  -     ISSN:  1095-9513     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-2-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9304400     Medline TA:  Mol Phylogenet Evol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Inc.
Affiliation:
Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville TN 37996, USA.
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