Figure 4.

A summary of evolutionary histories of MADS-box genes in Solanaceae.

(A) A simplified phylogeny used in gene family analysis. Stars indicate WGDs/WGTs shared by angiosperms (WGD ε, blue), core eudicots (WGT γ, green), and Solanaceae (WGT1, orange). Subf. represents subfamily and indicates the MADS-box subfamily in (B).

(B) The evolution of MADS-box genes in Solanaceae. Gene names are labeled as found in Arabidopsis (left) and tomato (right). Gene subfamily names are on the far right. Colored stars indicate GDs from WGDs corresponding to (A). The dashed line of FBP9/23 indicates gene loss in Arabidopsis, and the gene lineage is named as found in Petunia.