Document Detail

Molecular phylogenetics of Neotropical Cedreleae (mahogany family, Meliaceae) based on nuclear and plastid DNA sequences reveal multiple origins of "Cedrela odorata".
MedLine Citation:
PMID:  19348956     Owner:  NLM     Status:  MEDLINE    
This study focuses on the 17 Neotropical species described in Cedrela (Meliaceae; Cedreleae), in particular C. odorata, which has been shown in past population genetic studies to be more variable than other tree species. We sampled two sets of molecular markers, nuclear ribosomal spacers (nrITS), and several plastid regions (the psbB, psbN, psbT exons and the trnS-trnG spacer). Both sets of markers produced congruent results using parsimony, maximum likelihood and Bayesian methods for a set of taxa that include outgroups (outside Cedreleae) as well as other members of the related genera within Cedreleae. All results confirm current delimitation of Cedreleae and genetic distinctiveness for four new species with divergent morphologies. Our study also provides evidence that there are several genetic entities among the accessions of C. odorata that have distinct ranges or habitat preferences. These entities may constitute new species, are morphologically cryptic and require a great deal more investigation to delimit their ranges. Our results have important implications for conservation of Cedrela odorata, which is heavily harvested throughout its range in the American tropics.
Alexandra N Muellner; Terence D Pennington; Mark W Chase
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-04-05
Journal Detail:
Title:  Molecular phylogenetics and evolution     Volume:  52     ISSN:  1095-9513     ISO Abbreviation:  Mol. Phylogenet. Evol.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-05-29     Completed Date:  2009-06-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9304400     Medline TA:  Mol Phylogenet Evol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  461-9     Citation Subset:  IM    
Molecular Systematics Section, Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK.
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MeSH Terms
Bayes Theorem
Cedrela / anatomy & histology,  classification,  genetics*
Cell Nucleus / genetics
DNA, Plant / genetics
DNA, Ribosomal Spacer / genetics
Evolution, Molecular*
Genetic Markers
Genetics, Population
Likelihood Functions
Plastids / genetics
Sequence Alignment
Sequence Analysis, DNA
Species Specificity
Reg. No./Substance:
0/DNA, Plant; 0/DNA, Ribosomal Spacer; 0/Genetic Markers

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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