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Abstract Detail


Genome Evolution

Henkhaus, Natalie [1], Jurevic, Leigh [2], Espey, John [2], Kahsai, Emanual [2], Clark, Chanel [2], Madlung, Andreas [2].

Natural variation in the allopolyploid Arabidopsis suecica.

The species Arabidopsis suecica was derived from allopolyploidization (hybridization concomitant with genome doubling) of the two species A. thaliana and A. arenosa some 20,000 years ago in a single hybridization event. Allopolyploidization has been implicated in widespread genomic instability (genomic shock), epigenetic changes, gene activation and gene silencing, genomic rearrangements and transposon activation. We hypothesized that the molecular consequences of genomic shock in allopolyploids may lead to greater phenotypic variability in the allopolyploid offspring than in siblings of the original diploid parents. Using thirteen different geographic accessions of the natural allopolyploid A. suecica we asked if allopolyploidy-induced genomic instability may facilitate more rapid radiation than might be possible in diploids. Here we report variation between allopolyploid accessions of A. suecica that may have adaptive value.


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1 - University of Puget Sound, Biology, 1500 N Warner St, CMB 3478, Tacoma, WA, 98416, USA
2 - University of Puget Sound, Biology

Keywords:
Allopolyploidy
polyploid
Arabidopsis suecica.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P40015
Abstract ID:1731


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