Skip to main content
. 2012 Sep 11;3:208. doi: 10.3389/fpls.2012.00208

Figure 1.

Figure 1

Genome evolution of B. napus and A. thaliana. Prior to their divergence approximately 13–17 MYA B. napus and A. thaliana share a complex genome evolution including three (denoted 1R, 2R, and 3R) whole genome duplication (WGD) events. The last two WGD events post date the divergence of the Moncots/Dicots and the Caricaceae/Brassicaceae. Since their divergence the ancestor of extant Brassica species underwent a whole genome triplication event (WGT, denoted 4R) with the allopolyploid B. napus arising from the hybridization of B. rapa and B. oleracea. Superscript numbers relate to references for divergence times. For an in depth analysis of evolutionary history of Brassicaceae please refer to the excellent review by Franzke et al. (2011). 1(Soltis et al., 2009); 2(Mun et al., 2009); 3(Bell et al., 2010); 4(Henry et al., 2006); 5(Yang et al., 1999); 6(Koch et al., 2000); 7(Couvreur et al., 2010); 8(Lysak et al., 2005).