Fig. 4

Hypothetical evolutionary models for AAPs from plants. The circles represent gene duplication events inferred from the phylogenetic analysis. The blue color indicates the number of tandem duplication and the green one means segmental duplication. The semicircle is divided into 6 parts, and each part is filled with color to represent a duplication event. Representative species of each major taxonomic group are shown at the branch tip. Branches are colored depending on their taxonomy classification