Fig. 1From: Strigolactone synthesis is ancestral in land plants, but canonical strigolactone signalling is a flowering plant innovationOptimal phylogeny for D27 family. Maximum likelihood (ML) tree under the MGK+F3X4+R5 codon model in IQtree. Topology rooted with the D27L2 clade. Key bootstrap values are shown along the backbone of the tree. The fully labelled phylogeny is shown in Additional file 3ABack to article page