Roalson, Eric H. , Riser Ii, James P. , Clark, John R. , Wagner, Warren L. .
Hybridization on the Waiahole Ditch Trail: species boundaries and conservation in Hawaiian Cyrtandra (Gesneriaceae).
Cyrtandra is the most species-rich genus of Gesneriaceae with more than 500 species, and is also the most species-rich angiosperm genus in the Hawaiian islands with 61 taxa in 59 species. Relationships among species and boundaries between species in Hawaii are largely unknown due to several factors. While phylogenetic studies to date have clearly supported a single origin of Cyrtandra in Hawaii, resolution among species is lacking. There are also significant questions about the limits of species, as hybridization among species when they occur in sympatry has been proposed to explain the morphologically variable and sometimes intermediate individuals found in mixed populations. Here we start to address these questions of species limits and the impact of hybridization on Cyrtandra diversification by studying species boundaries along the Waiahole Ditch Trail of the northern Ko`olau Range of Oahu. We have here used population genetic markers to determine species membership among as complete a sampling of Cyrtandra individuals on the Waiahole Ditch Trail as possible. We also present some preliminary results from 454 sequencing of a Hawaiian EST library and its contribution to Cyrtandra diversification.
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1 - Washington State University, School of Biological Sciences, Pullman, WA, 99164-4236, USA
2 - Marie Selby Botanical Gardens, Gesneriad Research Center, 811 S. Palm Ave., Sarasota, Florida, 34236, USA
3 - National Museum of Natural History, Smithsonian Institution, Botany, P.O. Box 37012, MRC 166, Washington, DC, 20013-7012, USA
Presentation Type: Oral Paper:Papers for Topics
Location: 556A/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 9:15 AM