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Generic recircumscriptions of Oncidiinae (Orchidaceae: Cymbidieae) based on maximum likelihood analysis of combined DNA datasets

Authors

  • KURT M. NEUBIG,

    1. Florida Museum of Natural History, University of Florida, PO Box 117800, Gainesville, FL 32611-7800, USA
    2. Department of Biology, 220 Bartram Hall, PO Box 118525, University of Florida, Gainesville, FL 32611-8526, USA
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  • WILLIAM MARK WHITTEN,

    Corresponding author
    1. Florida Museum of Natural History, University of Florida, PO Box 117800, Gainesville, FL 32611-7800, USA
      E-mail: whitten@flmnh.ufl.edu
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  • NORRIS H. WILLIAMS FLS,

    1. Florida Museum of Natural History, University of Florida, PO Box 117800, Gainesville, FL 32611-7800, USA
    2. Department of Biology, 220 Bartram Hall, PO Box 118525, University of Florida, Gainesville, FL 32611-8526, USA
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  • MARIO A. BLANCO,

    1. Florida Museum of Natural History, University of Florida, PO Box 117800, Gainesville, FL 32611-7800, USA
    2. Department of Biology, 220 Bartram Hall, PO Box 118525, University of Florida, Gainesville, FL 32611-8526, USA
    3. Jardín Botánico Lankester, Universidad de Costa Rica, Apartado 1031-7050, Cartago, Costa Rica
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  • LORENA ENDARA,

    1. Department of Biology, 220 Bartram Hall, PO Box 118525, University of Florida, Gainesville, FL 32611-8526, USA
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  • JOHN GORDON BURLEIGH,

    1. Department of Biology, 220 Bartram Hall, PO Box 118525, University of Florida, Gainesville, FL 32611-8526, USA
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  • KATIA SILVERA,

    1. Center for Conservation Biology, 3168 Batchelor Hall, University of California, Riverside, Riverside, CA 92521, USA
    2. Department of Biochemistry/ MS 200, University of Nevada Reno, NV 89557-0014, USA
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  • JOHN C. CUSHMAN,

    1. Department of Biochemistry/ MS 200, University of Nevada Reno, NV 89557-0014, USA
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  • MARK W. CHASE FLS

    1. Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK
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E-mail: whitten@flmnh.ufl.edu

Abstract

Phylogenetic relationships within the orchid subtribe Oncidiinae sensu Chase were inferred using maximum likelihood analyses of single and multilocus DNA sequence data sets. Analyses included both nuclear ribosomal internal transcribed spacer DNA and plastid regions (matK exon, trnH-psbA intergenic spacer and two portions of ycf1 exon) for 736 individuals representing approximately 590 species plus seven outgroup taxa. Based on the well resolved and highly supported results, we recognize 61 genera in Oncidiinae. Mimicry of oil-secreting Malpighiaceae and other floral syndromes evolved in parallel across the subtribe, and many clades exhibit extensive variation in pollination-related traits. Because previous classifications heavily emphasized these floral features, many genera recognized were not monophyletic. Our classification based on monophyly will facilitate focused monographs and clarifies the evolution of morphological and biochemical traits of interest within this highly diverse subtribe. © 2011 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 168, 117–146.

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