Systematics Section / ASPT
Namoff, Sandra , Thornton, Hannah E. B. , Lewis, Carl , Oviedo, Ramona , Francisco-Ortega, Javier .
Molecular evidence for the phylogenetic relationships of Jacquemontia reclinata (Convolvulaceae).
JACQUEMONTIA is a pantropical genus of approximately 100 species, nine of which are endemic to the Caribbean basin. One of these, Jacquemontia reclinata House, is endemic to southeastern Florida and is a U.S. federally listed endangered species. Putative relatives of J. reclinata have been suggested, but the species relationships have never been tested in a phylogenetic analysis. We sequenced the internal transcribed spacer (ITS) regions of nuclear ribosomal DNA from 16 Jacquemontia species including all Caribbean species. The resulting phylogeny places J. reclinata in a clade with J. cayensis Britton, J. curtisii Peter, and J. havanensis Urban, all of which share floral morphological features. We observed very low ITS sequence divergence within this clade and were unable to resolve relationships among its species. This result suggests the need for additional sequence data and a review of species boundaries in the group. We also found that Convolvulus nodiflorus Desr. is nested within Jacquemontia with high support.
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1 - Florida International University, Deparment of Biological Sciences, 11200 SW 8th St., Miami, Florida, 33199, USA
2 - Fairchild Tropical Botanic Garden, Center for Tropical Plant Conservation, 11935 Old Cutler Road, Coral Gables, Miami, Florida, 33156-4242, USA
3 - Instituto de Ecologia y Sistematica, Carretera de Varona Km 3.5, Capdevila, Boyeros, Havana, , Cuba
Presentation Type: Oral Paper:Papers for Sections
Date: Wednesday, August 2nd, 2006
Time: 8:45 AM