Additional file 6: Figure S5. of Exploring the evolutionary origin of floral organs of Erycina pusilla, an emerging orchid model system

MADS-box gene lineage trees. (a) FUL-, (b) AP3-, (c) PI-, (d) AG-, (e) STK-, (f) SEP- and (g) AGL6-like trees. Color codes: green node = speciation event; red node = duplication event. Branches are colored along a gradient between blue and red, in proportion to the value of omega (dN/dS) for the third (i.e. the highest) rate class in the BranchSiteREL analysis. Hence, blue and red branches may be interpreted as suggesting, respectively, stabilizing and diversifying selection. Purple branches implicate a moderate level of diversifying selection. (ZIP 1121 kb)