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Abstract Detail

The Challenges Posed by Large Data Sets in Assembling the Plant and Fungal Trees of Life

Carlsward, Barbara S. [1], Judd, Walter S. [2], Donoghue, Michael J. [3], Soltis, Douglas E [2], Soltis, Pamela S. [4].

Character evolution among the dirty dozen angiosperm clades: examples from the Campanulidae and Saxifragales.

As part of the Angiosperm AToL project, features derived from vegetative and reproductive morphology were examined across 370 species of 294 flowering plant families. The focus of this large undertaking was to tease apart relationships within twelve problematic nodes of flowering plants (basal angiosperms, basal eudicots, core eudicots, Saxifragales, Caryophyllales, basal rosids, basal fabids, Malpighiales, Ericales, basal lamiids, Lamiales, and Campanulidae) using sequence data from multiple gene regions. These sequence data have provided a topology for mapping morphological features that helped diagnose resulting clades within these large groups. All observations were recorded from herbarium specimens, using both light as well as scanning electron microscopy, and qualitative characters were mapped onto a multi-gene framework to examine patterns of morphological variation for use as potential synapomorphies. Using the Saxifragales and Campanulidae as examples, we found that at least some clades are morphologically diagnosable. Ultimately, similar morphological features will be used in an overall analysis of all twelve problematic clades. These tangible, structural characters should provide invaluable tools that can be used in teaching as well as in communication with botanists involved in floristic studies.

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Related Links:
Tree of Life web project
Assembling the Tree of Life Project

1 - Eastern Illinois University, Department of Biological Sciences, 600 Lincoln Avenue, Charleston, Illinois, 61920-3099, USA
2 - University of Florida, Department of Botany, 220 Bartram Hall, P.O. Box 118526, Gainesville, Florida, 32611-8526, USA
3 - Yale University, Department Ecology & Evolutionary Biology, Po Box 208105, New Haven, Connecticut, 06520-8105, USA
4 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611-7800, USA

Tree of Life
character mapping

Presentation Type: Symposium or Colloquium Presentation
Session: SY5
Location: Ballroom 2/Cliff Lodge - Level B
Date: Tuesday, July 28th, 2009
Time: 8:30 AM
Number: SY5002
Abstract ID:231