Phylogeny of Gaultherieae (Ericaceae: Vaccinioideae) Based on DNA Sequence Data frommatK,ndhF, and nrITS

Phylogenetic relationships within the tribe Gaultherieae (Chamaedaphne,Diplycosia,Eubotrys,Gaultheria,Leucothoë, andTepuia) were examined with DNA sequence data frommatK,ndhF, and nrITS. Parsimony analyses were performed in PAUP* for each gene region, combined chloroplast data, and total combined da...

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Bibliographic Details
Published in:International journal of plant sciences 2009-03, Vol.170 (3), p.355-364
Main Authors: Bush, Catherine M., Lu, Lu, Fritsch, Peter W., Li, De‐Zhu, Kron, Kathleen A.
Format: Article
Language:English
Subjects:
Berries
Calyx
Capsules
Chloroplasts
Datasets
Evolution
Fruits
Inflorescences
Parsimony
Taxa
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Summary:Phylogenetic relationships within the tribe Gaultherieae (Chamaedaphne,Diplycosia,Eubotrys,Gaultheria,Leucothoë, andTepuia) were examined with DNA sequence data frommatK,ndhF, and nrITS. Parsimony analyses were performed in PAUP* for each gene region, combined chloroplast data, and total combined data. A Bayesian analysis was performed in MrBayes on the chloroplast and total combined data sets. The total combined parsimony and Bayesian analyses both strongly support the monophyly of the Gaultherieae and the wintergreen group (Diplycosia,Gaultheria, andTepuia).Diplycosiais monophyletic and nested within part ofGaultheria. In the Bayesian total combined analysis,Tepuiais strongly supported as sister to a clade containingGaultheria procumbens,Gaultheria hispidula,Gaultheria leucocarpavar.cumingiana,Gaultheria leucocarpavar.leucocarpa, and all sampledDiplycosiaspecies. Optimization of morphological characters emphasized in classifications of the Gaultherieae onto the molecular phylogeny revealed that (1) fleshy calyces evolved either early in the lineage leading to the wintergreen group or later in two separate clades; (2) capsular fruits are plesiomorphic and berry fruits have evolved independently inDiplycosiaandTepuiaand once or twice within a large clade containing all sampled sect.Pernettyamembers andGaultheriaspecies not exhibiting a berry fruit; and (3) the ancestral state for both the Gaultherieae and wintergreen group is a racemose inflorescence; solitary‐flowered inflorescences have evolved at least eight times within the Gaultherieae, with several changes back to racemose or fascicular inflorescences.
ISSN:1058-5893
1537-5315
DOI:10.1086/596330