Givnish, Thomas J. , Leebens-Mack, James H. , McNeal, Joel R. , Ames, Mercedes , Cacho, N. Ivalu , Berry, Paul E. , Sytsma, Kenneth J. .
A phylogenomic approach to bromeliad phylogeny.
Slow rates of molecular divergence within Bromeliaceae have made it difficult to resolve a number of key nodes within the family. Here we use DNA sequences of entire plastid genomes (i.e., plastomes) to resolve relationships among representatives of all eight subfamilies. This approach provides the maximum possible information on phylogenetic relationships from the plastid genome; we use the resulting data to compare results with a much more extensive taxon sampling (ca. 90 spp) and much less extensive data sample (eight plastid genes and spacers). The total number of variable sites within coding regions is 5 to 15 times that in a five-locus analysis, and 14 to 44 times that in ndhF alone. Including non-coding regions greatly increase these numbers. While phylogenomics provides an avalanche of data, it does not relieve us of the need to complement it with adequate taxon sampling. Jackknifing the taxon sampling shows that even plastome-wide data can lead to distorted views of bromeliad phylogeny with inadequate taxon sampling.
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1 - University of Wisconsin-Madison, Department of Botany, 430 Lincoln Drive, Birge Hall, Madison, WI, 53706, USA
2 - University of Georgia, Department of Plant Biology, 4504 Miller Plant Sciences, Athens, GA, 30602, USA
3 - University of Wisconsin, Botany, 430 Lincoln Dr, Madison, WI, 53706, USA
4 - University of Wisconsin, Department of Botany, 430 Lincoln Drive, Madison,, Wisconsin, WI 53706, USA
5 - University of Michigan Herbarium, Ecology and Evolutionary Biology, 3600 Varsity Dr, Ann Arbor, Michigan, 48108, USA
6 - University of Wisconsin-Madison, Botany, 430 Lincoln Drive, Madison, WI, 53706, United States
Presentation Type: Oral Paper:Papers for BSA Sections
Location: Cottonwood D/Snowbird Center
Date: Wednesday, July 29th, 2009
Time: 1:00 PM