Fig. 2
Frequency distribution of phenotypic variation of six-stem hardness related traits and seven yield-related traits and correlation coefficients among the traits in 237 accessions. BL: bending lower; AL: acupuncture lower; CL: compression lower; BU: bending upper; AU: acupuncture upper; CU; compression upper: PH: plant height; BW: boll weight; GP: growth period; LP: lint percentage; LI: lint index; SI: seed index index; FWPB: flower weight per boll. *, **, ***: significant at P = 0.05, P=0.01, P=0.001, respectively