Fig. 1

A dendrogram showing the phylogenetic relationships among the diverse set of sorghum lines. Each sample is labelled as follows; the genotype name, sample type (coded, as detailed below), racial type, geographic origin, and total number of SNPs identified. Sample type codes: I improved variety, L landrace, W weedy or wild, M margaritiferum, P Sorghum propinquum. The sorghum reference genome BTx623 is shown in bold, sweet sorghums are in italic. (Adapted from Mace et al. [16] and redrawn using the tool “Display Newick Trees” under MEGA 6.0, SS79 was added based on the output results of the SNPhylo program [34] using the SNP data.)