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Abstract Detail

Systematics Section

Neubig, Kurt [1], Whitten, W. Mark [2], Williams, Norris [2], Chase, Mark [3], Blanco, Mario [1], Endara, Lorena [1], Burleigh, Gordon [1], Silvera, Katia [4], Cushman, John [5].

Generic recircumscriptions of Oncidiinae (Orchidaceae: Cymbidieae) based on combined molecular data sets.

Phylogenetic relationships within the orchid subtribe Oncidiinae sensu Chase were inferred using maximum likelihood analyses of individual and combined sequence alignments of nrITS DNA and three plastid regions (matK, trnH-psbA spacer, two portions of ycf1) for 738 individuals representing ca. 590 species plus 7 outgroup taxa. Based on the highly supported bootstrap consensus, we recognize 61 genera in Oncidiinae. Previous classifications emphasized homoplasious Oncidium-type floral features, phylogenetically intercalated with many other variable floral syndromes, resulting in non-monophyletic genera. Batesian and Mullerian mimicry of oil-secreting Malpighiaceae (and other oil-secreting flowering plant groups) may be responsible for convergence in floral features across the subtribe. This classification based on monophyly will facilitate focused monographs and will clarify the evolution of morphological and biochemical traits of interest within this subtribe.

Broader Impacts:

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1 - University of Florida, Department of Biology, 220 Bartram Hall, Gainesville, FL, 32611-8526, USA
2 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA
3 - Royal Botanic Gardens - Kew, Jodrell Laboratory, Kew Road, Richmond, N/A, TW9 3DS, United Kingdom
4 - University Of Nevada Reno, 3141 Terrace Dr, Riverside, CA, 92507, USA
5 - University of Nevada Reno, Department of Biochemistry, Reno, NV, 89557-0014, USA

molecular phylogenetics

Presentation Type: Poster:Posters for Sections
Session: P
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM
Number: PSY042
Abstract ID:145

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