Recent Topics Posters
Eserman, Lauren A. , Miller, Rick .
Overview of morning glory systematics based on a phylogenetic analysis of 27 gene regions .
Morning glories are a diverse group of flowering plants typically considered members of the genus Ipomoea L. However, this genus is not monophyletic, and a number of segregate genera derived from within Ipomoea are recognized. Therefore, current systematic studies focus on the tribe Ipomoeeae, a well-supported monophyletic assemblage consisting of Ipomoea and nine other genera. Here, we provide an overview of Ipomoeeae systematics from a phylogenetic analysis of 27 gene regions. The data for this investigation include ITS sequences for 360 taxa representing 112 species, as well as DNA sequences for 17 nuclear genes, 8 chloroplast gene regions and one RFLP dataset, each containing varying numbers of species. We evaluated each gene tree with respect to phylogenetic signal and have applied a qualitative approach to develop hypotheses for Ipomoeeae species relationships. We have also identified rogue taxa, which are species with very different placements among multiple gene trees. While these phylogenetic hypotheses are derived from an exemplar sample of the approximately 900 species of Ipomoeeae, these results represent important progress in the understanding of evolutionary relationships among morning glories.
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1 - Southeastern Louisiana University, Department of Biological Sciences, Hammond, LA, 70401, USA
2 - Southeastern Louisiana University, Department of Biological Sciences, Hammond, Louisiana, 70402, USA
Presentation Type: Recent Topics Poster
Location: Hall A/Convention Center
Date: Monday, August 2nd, 2010
Time: 5:30 PM