Comparative Genomics, Development, Physiology and Systematics of the Brassicaceae and Cleomaceae
Schranz, M. Eric , Windsor, Aaron J. , Bouck, Amy , Mitchell-Olds, Tom , Vogel, Heiko .
Paleopolyploidy and comparative genomics of the Brassicaceae and Cleomaceae.
Paleopolyploidy has played an important role in the genome evolution of many, if not all, angiosperms. Large tracts of plant genomes occurring in replicate complicate comparative analyses, particularly when a paleopolyploid ancestry is not known or when two lineages have undergone independent ancient polyploidy events. The complete genome sequencing of Arabidopsis revealed an ancient polyploidy event that occurred near the origin of the family Brassicaceae. I will discuss my research addressing the conservation of gene duplicates and genome structure both within the Brassicaceae (among species that share a common paleopolyploid ancestry) and by comparison to Cleome spinosa in the Cleomaceae (which has undergone an independent ancient polyploidy event). Specifically, I will discuss the conservation of large genomic blocks revealed by comparative genetic mapping among several crucifers investigated to date. In particular, I will highlight comparative analyses between the genus Arabidopsis and Boechera that diverged approximately 10 million years ago. I will also discuss how comparative sequencing of BACs and ESTs from Cleome spinosa provide evidence of an independent ancient polyploidy event occurring in the Cleomaceae. The independent polyploid histories of these two sister families provide a unique opportunity to examine patterns of duplicate gene retention and loss. Finally, I will discuss current efforts to construct a genetic linkage map of Cleome in order to examine syntenic patterns with the Brassicaceae.
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1 - University of Amsterdam, Institute for Biodiversity and Ecosystem Dynamics, P.O. Box 94062, Amsterdam, 1090 GB, The Netherlands
2 - Duke University, Biology, Box 90338, Durham, NC, 27708, USA
3 - Max Planck Institute of Chemical Ecology, Entomology, Hans Knoll Strasse 8, Jena, 07745, Germany
Presentation Type: Symposium or Colloquium Presentation
Location: Stevens 2/Hilton
Date: Monday, July 9th, 2007
Time: 3:30 PM