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Abstract Detail


Systematics Section/ASPT

Meerow, Alan [1], Noblick, Larry [2], Francisco-Ortega, Javier [3], Nakamura, Kyoko [4].

Molecular phylogeny of the "spiny" Cocoseae (Arecaceae) using six WRKY loci and various methods of gene tree/species tree reconciliation.

The Cocoseae is one of 13 tribes of Arecaceae subfamily Arecoideae, and contains a number of palms with significant economic importance, including the monotypic and pantropical Cocos nucifera, the coconut, and African oil palm (Elaeis guineensis). Using seven single copy WRKY transcription factor genes, we previously inferred a well resolved phylogeny and chronology of the subtribe Attaleinae. In that study, we resolved a monophyletic relict African clade as sister to the American genera, including Cocos. We determined that Lytocaryum is best treated as part of Syagrus, resolved Syagrus sensu lato as sister to Cocos, and presented a novel clade uniting Parajubaea with Butia and Jubaea that is also supported by leaf anatomical data. Branch nodes were congruent with major paleogeographic events. We now extend our sequence analysis across the rest of the tribe, including representatives of Attaleinae, with Roystonea and Reinhardtia as outgroups. Three subtribes, Attaleinae, Bactridinae and Elaeidinae are consistantly resolved with strong support. The monotypic Amazonian Barcella is sister to a monophyletic Elaeis. Acrocomia, Aiphanes, Astrocaryum, and Bactris form well-supported clades. Intergeneric relationships in Bactridinae are less robust and differ from a recent analysis. Several methods of species tree inference are compared, including gene tree parsimony with iGTP, *BEAST and BUCKy.

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Phylogenetic analysis of seven WRKY genes across the palm subtribe Attaleinae (Arecaceae) identifies Syagrus as sister group of the coconut


1 - USDA-ARS-SHRS, UNITED STATES DEPARTMENT OF AGRICULTURE, 13601 Old Cutler Road, Miami, FL, 33158, USA
2 - Montgomery botanical Center, 11901 Old Cutler Road, Coral Gables, FL, 33156, USA
3 - Florida International University & Fairchild Tropical Botanic Garden, Miami, FL, 33199, USA
4 - USDA-ARS-SHRS, National Germplasm Repository, 13601 Old Cutler Rd., Miami, FL, 33158, USA

Keywords:
molecular systematics
species tree inference
palms
Phylogenetics
WRKY genes.

Presentation Type: Oral Paper:Papers for Sections
Session: 38
Location: Delaware B/Hyatt
Date: Tuesday, July 10th, 2012
Time: 4:15 PM
Number: 38011
Abstract ID:109


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