Land Plant Evolution: Phylogenetics and Beyond
Quandt, Dietmar , Borsch, Thomas , Wicke, Susann , Won, Hyosig , Renner, Susanne S. , Hilu, Khidir W. .
Land plant evolution: a perspective from fast evolving chloroplast regions.
DESPITE the progress in molecular phylogenetics, relationships among the major land plant lineages are still controversial. Standouts among the difficulties are the relationships among the three bryophyte lineages (hornworts, liverworts, and mosses), their position in the land plant tree, and the position of Gnetales among seed plants.
We have analyzed the fast evolving genomic regions trnK/matK and trnL-F, together with structural aspects derived from minimum energy calculations. The data provide evidence that early land plants consist of a bryophyte grade, with liverworts as the first-branching lineage, followed by mosses and hornworts. Lycophytes comprise the first-branching tracheophytes, with Moniliformopses sister to seed plants, and Gnetales as the first-branching seed plant lineage. This phylogenetic pattern is supported by functional and structural aspects of the trnL intron P4&5 helical elements.
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1 - Dresden University of Technology, Institute of Botany, Plant Phylogenetics & Phylogenomics Group, Dresden, D-01062, Germany
2 - Rheinische Friedrich-Wilhelms-Universität Bonn, Nees-Institut für Biodiversität der Pflanzen, Meckenheimer Allee 170, Bonn, D-53115, Germany
3 - Carnegie Museum of Natural History, 4400 Forbes Avenue, Pittsburgh, Pennsylvania, 15213, USA
4 - Ludwig-Maximilians Universitaet Muenchen, Faculty of Biology, Munich, D-80638
5 - Virginia Polytechnic Institute and State University, Department of Biology, Blacksburg, Virginia, 24061, USA
seed plant phylogeny
Presentation Type: Symposium or Colloquium Presentation
Date: Monday, July 31st, 2006
Time: 1:35 PM