Fig. 1.

sdbc1 mutant identification and agronomic trait observation. a Four month old wild type (WT), sdbc1 homozygous (sdbc1) and Sdbc1 heterozygous (F1) plants. Bar = 10 cm. b, c Brittleness of culms (Bar = 5 cm) and leaves (Bar = 3 cm). d, e Measurements of the extension force of internodes and leaves. f Plant height. g Tiller number h Number of grains per panicle. i Panicle length. j Seed setting rate. k 1000-grain weight. Error bars represent SE (n = 50). Different letters denote significant differences (P < 0.05, Duncan’s multiple range test)