Systematics/Phytogeography / Taxonomie/ Section
Kinney, Michael S. , LeRoy, Jill , Hertweck, Kate L. , Maurin, Olivier , Stuart, Stephanie A. , Mathews, Sarah , Chase, Mark W. , Pires, J. Chris .
Phylogenetic relationships of the monocots based on nuclear PHYTOCHROME C sequences.
Several molecular phylogenetic studies have examined monocot relationships using DNA sequence data primarily from the chloroplast and mitochondrial genomes. We present here the first comprehensive phylogeny of the monocots using a low-copy based nuclear gene,
PHYTOCHROME C (PHY C). A total of 149 taxa representing all 12 orders and nearly all monocot families were sampled in addition to 12 outgroup families. Most of the DNAs used were from the same accessions used in previous phylogenetic studies (Chase et al. 2006) to better examine potential sources of incongruence. The PHY C gene is phylogenetically informative across the monocots and appears to be single copy for most of the taxa studied, although paralogous copies could be detected in a small number of taxa. This low-copy nuclear gene gives strong support for the monophyly of several clades, including currently recognized families and orders; however, PHY C does not resolve relationships between orders with high support. Preliminary results of our phylogenetic analyses are largely congruent with previous studies although a few novel relationships are suggested although only weakly supported. The utility of combining PHY C data with plastid, mitochondrial, and nrDNA sequence data to resolve phylogenetic relationships will also be addressed.
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1 - University of Missouri-Columbia, Biological Sciences, 311 Life Sciences Center, 1201 Rollins St, Columbia, MO, 65211, USA
2 - University of Missouri-Columbia, Biological Sciences, 311 Life Sciences Center, 1201 Rollins St, Columbia, MO, 65211, USA
3 - University of Missouri Columbia, Biological Sciences, 1201 Rollins Road, Life Sciences Center 311, Columbia, Missouri, 65211, USA
4 - Royal Botanic Gardens Kew, Jodrell Laboratory, Ricmond, Surrey, TW9 3AB, United Kingdom
5 - University of California, Berkeley, Department of Integrative Biology, 3060 Valley Life Sciences Bldg #3140, Berkeley, California, 94720, USA
6 - Harvard University, Arnold Arboretum, Harvard University Herbaria, 22 Divinity Avenue, Cambridge, Massachusetts, 02138, USA
7 - Royal Botanic Gardens, Kew, Jodrell Laboratory, Richmond, Surrey, TW9 3AB, United Kingdom
low copy nuclear markers
nuclear gene phylogenetics.
Presentation Type: Oral Paper:Papers for Sections
Date: Tuesday, July 29th, 2008
Time: 8:00 AM