Bryological and Lichenological Section/ABLS
Neubig, Kurt , Burleigh, J. Gordon , Ruhfel, Brad , Jones, Kelly , Mcdaniel, Stuart .
The evolution of the phytochrome gene family in mosses.
Phytochrome (PHY) is one of the best-characterized gene families in mosses. In contrast to angiosperms phylogenetics where PHY has been widely utilized, variation in the PHY gene family has had a limited impact on bryophyte systematics. Here we present a phylogenetic analysis of the PHY gene family in mosses, based on a 1.8Kb portion of chromophore-binding domain of the PHY protein. We show that one ancient duplication occurred prior to the split between the nematodontous and arthrodontous mosses, and a second ancient duplication occurred before the split between Buxbaumia and the arthrodontous mosses. More recent duplications occurred in the Funariidae and at the base of the Dicranidae. We also show that the chimeric fusion gene CpPHY1 arose within the C. purpureus lineage and underwent a period of rapid evolution following its origin, potentially driven by directional selection. The three main lineages of PHY show heterogeneous rates of molecular evolution, and considerable lability in their light-response phenotypes. Based on these results we present a new phylogenetically-based nomenclature for the PHY gene family in mosses, and a database of experimentally verified copy-specific primers for the PHY family across the mosses.
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1 - University of Florida, Florida Museum of Natural History, 385 Dickinson Hall, Gainesville, FL, 32611-7800
3 - University Of Florida, Department Of Biology, P.O. Box 118525, Carr Hall, Room 217, Gainesville, FL, 32611, USA
4 - University of Florida, Department of Biology, P.O. Box 118525, Carr Hall, Room 217, Gainesville, FL, 32611
5 - University of Florida, Dept. of Biology, Gainesville, FL, 32611
Presentation Type: Poster:Posters for Sections
Location: Battelle South/Convention Center
Date: Monday, July 9th, 2012
Time: 5:30 PM