Figure 1.

Schematic phylogenetic tree of flowering plants. BR1 to BR4 denote potential time points when the γ event may have occurred. BR1, monocots + eudicots duplication; BR2, eudicot-wide duplication; BR3, core eudicot-wide duplication; BR4, rosid-wide duplication.

Jiao et al. Genome Biology 2012 13:R3   doi:10.1186/gb-2012-13-1-r3
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