Fig. 4: Phylogenetic analyses of three gene families showing gene duplications.

a SAD gene family tree. b FAD gene family tree. c FAR gene family tree. Colour shading for taxa as in Fig. 2a. O. sphegodes genes are shown in bold, branch thickness indicating bootstrap support. The first three or four letters of each gene sequence indicate species (as in Supplementary Table 11), where Osph indicates O. sphegodes; Pgu and Pzi indicate Platanthera guangdongensis and P. zijinensis, respectively. Black bars highlight clustered genes shown in subsequent Figure panels. d SAD2 gene cluster on chr 4, containing SAD1/2/8/7Ψ (gene details in Supplementary Table 7 and Supplementary Data 1). e Details of a cluster on chr 1 containing 3 FAD homologues. f Details of scaffold 578 with 6 FAR gene homologues. Gene models of interest are drawn in red.