Paleopolyploidy in the Brassicales: analyses of the Cleome transcriptome elucidate the history of genome duplications in Arabidopsis and other Brassicales.

ABSTRACT: The analysis of the Arabidopsis genome revealed evidence of three ancient polyploidy events in the evolution of the Brassicaceae, but the exact phylogenetic placement of these events is still not resolved. The most recent event is called the At-alpha (alpha) or 3R, the intermediate event is referred to as the At-beta (beta) or 2R, and the oldest is the At-gamma (gamma) or 1R. It has recently been established that At-gamma is shared with other Rosids, including papaya (Carica), poplar (Populus), and grape (Vitis), whereas data to date suggest that At-alpha is Brassicaceae specific. To address more precisely when the At-alpha and At-beta events occurred and which plant lineages share these paleopolyploidizations, we sequenced and analyzed over 4,700 normalized expressed sequence tag sequence

SUBMITTER: Barker MS 

PROVIDER: S-EPMC2817432 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature