Abstract Detail
Pteridological Section/AFS Baniaga, Anthony [1], Arrigo, Nils [1], Barker, Michael [1]. Genomics of Allopolyploidy and Hybridization in Selaginella subg. Tetragonostachys. Polyploidy and hybridization are recognized as important features of plant genome evolution and plant diversification. Here I study gene family evolution using a comparative genomic approach on a set of seven taxa in Selaginella subg. Tetragonostachys [Selaginellaceae] found in the Sonoran Desert of southwestern North America. I evaluate transcriptomic and genomic data generated from naturally occurring diploid (2x), putative homoploid hybrid (2x), and polyploid (3x, 4x) individuals in order to quantify the genomic contribution of parental taxa. This genomic contribution includes syntenic relationships of parental taxa and hybrids, and how loci associated with rates of rapid evolution in the parents are organized in hybrid taxa. I also test systematic relationships of the seven taxa using genome-wide data. These results inform our knowledge of how allopolyploidy and hybridization can influence plant genome evolution and speciation in a basal lineage of land plants. Broader Impacts:
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Related Links: Barker Lab, University of Arizona
1 - University of Arizona, Ecology & Evolutionary Biology, P.O. Box 210088, Tucson, AZ, 85712, USA
Keywords: Selaginella allopolyploidy genomics hybridization.
Presentation Type: Oral Paper:Papers for Sections Session: 34 Location: Melrose/Riverside Hilton Date: Tuesday, July 30th, 2013 Time: 2:15 PM Number: 34004 Abstract ID:622 Candidate for Awards:Edgar T. Wherry award |