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Abstract Detail


Systematics Section / ASPT

Brockington, Samuel F [1], Alexandre, Roolse [2], Ramdial, Jeremy [1], Dhingra, Amit [3], Soltis, Pamela S. [4], Soltis, Douglas E. [5].

Resolving poorly supported nodes in the order Caryophyllales: An ATOL Update.

Previous phylogenetic analyses of the angiosperm order Caryophyllales, using ~ 5000 base pairs, recovered a phylogeny in which many of the deeper level relationships remained poorly supported. To clarify and provide support for interfamilial relationships within the order Caryophyllales sensu lato we constructed two new data sets comprising 2 nuclear genes: 18S and 26S rDNA and 7 chloroplast genes; rbcL, rpoC2, rps4, atpB, psbBTNH, ndhF and matK, (~20,000 bp) for 40 taxa 2) and the entire chloroplast inverted repeat (~26,000 bp) for 35 taxa. The latter was sequenced was sequenced using the PCR-based method ASAP. The data sets were analysed both separately and in combination. Various phylogenetic methods were used to analyze the data matrix including Parsimony, Maximum Likelihood and Bayesian inference. Many poorly supported lineages received increased support through higher posterior probability and bootstrap values. The slower evolving plastid genes associated with the inverted repeat of the chloroplast region proved useful in providing support and resolution at deeper levels within the order.


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1 - University of Florida, Department of Botany, Florida Museum of Natural History, P.O. Box 117800, Gainesville, Florida, 32611-7800, USA
2 - University of Florida, Department of Botany, Florida Museum of Natural History, P.O. Box 117800, Gainesville, Florida, University of Florid, USA
3 - Washington State University, Horticultural and Landscape Architecture Department
4 - Florida Museum of Natural History, Dickinson Hall, P.O. Box 117800, Gainesville, Florida, 32611, USA
5 - University of Florida, Department of Botany, 220 Bartram Hall, P.O. Box 118526, Gainesville, Florida, 32611-8526, USA

Keywords:
Caryophyllales
ATOL
ASAP
molecular phylogeny.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P59006
Abstract ID:2065


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