Abstract Detail

Systematics Section

Soltis, Douglas E. [1], Smith, Stephen A. [2], Cellinese, Nico [3], Moore, Michael [4], Refulio-Rodriguez, Nancy F. [5], Olmstead, Richard [6], Crawley, Sunny S [7], Black, Chelsae [7], Diouf, Diaga [7], Hilu, Khidir W. [8], Qiu, Yin-Long [9], Sytsma, Kenneth J. [10], Wurdack, Kenneth [11], Xi, Zhennxiang [12], Davis, III, Charles C. [13], Tank, David [14], Sanderson, Michael [15], Donoghue, Michael J. [16], Soltis, Pamela S. [17].

Inferring angiosperm phylogeny: 17-gene 642-taxon analyses.

We conducted phylogenetic analyses using RAxML of 642 species from 329 families using 17 genes (24,625 base pairs) representing all three plant genomes (mtDNA, cpDNA, nuclear). The combination of many genes and many exemplars has resulted in a well-resolved and well-supported topological framework for angiosperms. The deep-level relationships agree with those based on complete plastid genome sequence data, but the present study employs much greater taxon sampling. Most questions of deep-level relationships in the non-monocot angiosperms have now been resolved. Following the Amborellaceae, Nymphaeales, and Austrobaileyales, the remaining angiosperms (Mesangiospermae) are resolved into Chloranthales + Magnoliidae as sister to monocots + [Ceratophyllaceae + eudicots]. Eudicots comprise a basal grade sister to the core eudicots. Within the core eudicots, Gunnerales are sister to the remainder (Pentapetalae) which comprise: 1) a super-rosid clade of Rosidae, Vitaceae, Saxifragales; 2) a super-asterid clade of Berberidopsidales, Santalales, Caryophyllales, and Asteridae. Our analyses weakly support the position of Dilleniaceae as sister to super-rosids. These analyses further confirm that with extensive sequence data, most issues of deep-level relationships within the angiosperms can ultimately be resolved. This well-resolved tree will be of broad utility for many areas of biology, including physiology, ecology, paleobiology, and genomics. Furthermore, by clarifying the backbone of angiosperm phylogeny, we have provided a framework for more comprehensive phylogenetic efforts (e.g., sampling nearly all 15,000 angiosperm genera).

Broader Impacts:
Through this and other recent molecular investigations most questions of deep-level relationships in the angiosperms have now been resolved.This well-resolved tree will be of broad utility for many areas of biology, including physiology, ecology, paleobiology, and genomics. Furthermore, by clarifying the backbone of angiosperm phylogeny, we have provided a framework for more comprehensive phylogenetic efforts.

1 - University of Florida, Department of Biology, Florida Museum of Natural History, P.O. Box 117800, Gainesville, FL, 32611-7800, USA
2 - National Evolutionary Synthesis Center, 2024 W. Main Street, Suite A200, Durham, NC, 27705-4667, USA
3 - University of Florida, Florida Museum of Natural History, Dickinson Hall, PO Box 117800, Gainseville, FL, 32611, USA
4 - Oberlin College, Biology Department, 119 Woodland Street, Science Center K111, Oberlin, Ohio, 44074-1097, USA
5 - University of Washington, Department of Biology, Hitchcock Hall Rm 423, Seattle, WA, 98195-5325, USA
6 - University of Washington, Department of Biology and Burke Museum, Box 355325, Seattle, WA, 98195, USA
7 - Virginia Tech, Biological Sciences, 2119 Derring Hall, Blacksburg, VA, 24061, USA
8 - Virginia Tech, Biological Sciences, Blacksburg, Virginia, 24061, USA
9 - University of Michigan, Department of Ecology & Evolutionary Biology, 830 North University Avenue, Ann Arbor, Michigan, 48109-1048, USA
10 - University of Wisconsin Madison, Department of Botany, Birge Hall, 430 Lincoln Drive, Madison, Wisconsin, 53706-1381, USA
11 - University of Florida, Department of Biology, Gainesville, FL, 32611, USA
12 - Smithsonian Institution, Department of Botany, National Museum of Natural History, Washington, D. C., 20560, USA
13 - Harvard University, Department of Organismic and Evolutionary Biology, 22 Divinity Ave, Cambridge, MA, 02138, USA
14 - University of Idaho, Dept. of Forest Resources & Stillinger Herbarium, Moscow, ID, 83844, USA
15 - University of Arizona, Ecology and Evolutionary Biology, Tucson, AZ, 85721, USA
16 - Yale University, Ecology & Evolutionary Biology and Peabody Museum of Natural History, PO Box 208106, New Haven, CT, 06520-8106, USA
17 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611-7800, USA

Keywords:
none specified

Presentation Type: Oral Paper:Papers for Sections
Session: 27
Location: 552A/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 8:15 AM
Number: 27002
Abstract ID:852