Fig. 1

Gross morphology of CSSL28 and 9311 rice lines. a and b Plant phenotypes of CSSL28, 9311 and individuals from the CSSL28/9311 F1 generation. c Dynamic comparison of plant heights between CSSL28 and 9311 at different growth stages; all data are provided as means ± SDs (n = 20). d The appearances of the panicles and internodes of CSSL28 and 9311; 1–6 indicate internodes from head to base. e Comparison of the lengths of the panicles and internodes between CSSL28 and 9311; data are averages of the lengths of the panicles and internodes of the main culms (n = 50). f Schematic representation of internode elongation patterns of CSSL28 and 9311. **significant at P < 0.01