Diversity analysis of the sorghum accessions. (A) STRUCTURE (Pritchard et al., 2000) results: five subpopulations (G) corresponded to races. (B) Neighbor joining tree: branches (B1–B5) generally agreed to subpopulations (G) based on STRUCTURE results. (C) Number of accessions from specific races within each subpopulation. D, durra; K, kafir; ZC, zerazera-caudatum; B, bicolor; GB, guinea-bicolor; MF, milo-feterita; SB, sudanese-broomcorn; C, caudatum; GC, guinea-caudatum.