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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.

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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


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