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Abstract Detail


Systematics/Phytogeography / Taxonomie/ Section

Bacon, Christine D. [1], Simmons, Mark P. [2].

Phylogeny of the Trachycarpeae (Arecaceae:Palmae) as Inferred from Nuclear and Plastid Loci.

Trachycarpeae are a monophyletic group comprised of 269 species in 18 genera. It is a pantropical group and encompasses 19 highly endangered taxa according to the IUCN red list criteria. Poor resolution and support within this tribe is recognized as one of the three most significant phylogenetic ambiguities remaining in Arecaceae. For the first time subtribal affiliations of the group were densely sampled to resolve of seven genera that had previously been unplaced. We sampled representatives of the Trachycarpeae and seven outgroup genera for three low-copy nuclear (CISP 4, CISP 5, and RPB2) and three plastid (ndhF, matK, and trnD-T) genes. A correlation between the geography of the species sampled and their inferred relationships was found, as well as radiations in Southeast Asia (Licuala), in the Caribbean (Copernicia) and in the Hawaiian archipelago (Pritchardia). Differing gynoecium morphology amongst subtribes is present and its pattern of diversification is inferred through optimization.


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1 - Colorado State University, Biology, Fort Collins, CO, 80524-1878, USA
2 - Colorado State University, Department of Biology, Fort Collins, Colorado, 80523-1878, USA

Keywords:
Arecaceae
Palmae
low-copy nuclear gene
radiation
Trachycarpeae.

Presentation Type: Oral Paper:Papers for Sections
Session: 36
Location: 157/Law
Date: Tuesday, July 29th, 2008
Time: 8:30 AM
Number: 36003
Abstract ID:578


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