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Abstract Detail


Systematics Section

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

Phylogeny and biogeography of the Trachycarpeae (Arecaceae:Palmae).

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 most significant phylogenetic ambiguities remaining in Arecaceae. We sampled representatives of the Trachycarpeae and seven outgroup genera for three low-copy nuclear (CISP4, CISP5, and RPB2) and three plastid (ndhF, matK, and trnD-T) genes. For the first time subtribal affiliations of the group were densely sampled to resolve the seven genera that had previously been unplaced within the Trachycarpeae. Relationships within the subtribe Rhapidinae have also been resolved. Systematic changes in the group are needed, including the inclusion of Pritchardiopsis within Livistona. A correlation between the geography of the species sampled and their inferred relationships was found, such as radiations in Southeast Asia (Licuala), in the Caribbean (Copernicia) and in the Hawaiian archipelago (Pritchardia).


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1 - Colorado State University, Department of Biology, Fort Collins, Colorado, 80523-1878, U.S.A.
2 - Royal Botanic Gardens, Kew, Jodrell Laboratory, Richmond, Surrey, TW9 3AB, United Kingdom

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

Presentation Type: Oral Paper:Papers for BSA Sections
Session: 20
Location: Cottonwood A/Snowbird Center
Date: Monday, July 27th, 2009
Time: 5:00 PM
Number: 20014
Abstract ID:157


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