Fig. 1.

Phenotypic characterization of the soybean dw mutant. a The plant height of the dw mutant and the parent Zp661 at the seedling stage (2 weeks after emergence). b Phenotype of wild type and dw at maturity. White arrows indicated the nodes bearing soybean pods. c The plant height and the number of nodes on the stem of the mutant and the parent at maturity. d Comparison of all internode lengths for dw and wild-type plants at maturity (n = 15 plants). Longitudinal sections of the first internodes on the stem of the mutant (f) and the parent (e) at the V2 stage (one fully expanded trifoliolate). Scale bar is 5 cm in a, 4 cm for local area magnification and 45 cm for overview in b, 200 µm in e–f, respectively. A Student’s t test indicated a significant difference (n = 15 plants) in c. **P < 0.01; NS not significant. All data are given as mean ± SD