Fig. 2.

Phylogeny of Type I MADS-box genes. The two major putative clades of Type I genes, Mα and Mβ/γ (Gramzow et al., 2012), are marked by labelled lines on the right. The colours of the branches correspond to the colours of the gymnosperm genera in Fig. 1. Abbreviations of gymnosperm gene names are described in Table 1. Lycophyte sequences are from Selaginella moellendorffii and moss sequences are from Physcomitrella patens. Clades of angiosperm genes are collapsed into triangles and their classification according to (Parenicova et al., 2003; Leseberg et al., 2006; Arora et al., 2007) is shown on the right. Numbers at nodes denote bootstrap values. The fully resolved phylogeny is available as Supplementary Data Fig. S2.