Fig. 1

Phenotype, concentration of soluble protein and soluble sugar, and differentially expressed genes of hollow and non-hollow cucumber fruits. (A) Cross-sections of D0432-3-4 (♀), D0708-3(♂), and K07 (F₁) cucumber fruit. The six cross-sections of K07 showed non-hollow and different degrees of hollow hearts; (B and C) Concentration of soluble protein and soluble sugar in hollow and non-hollow cucumber fruit, respectively; (D) Venn diagram of differentially expressed genes in four comparison groups for transcriptome sequencing. Asterisk symbols (*, **) represented the significant results at **p < 0.01 and *p < 0.05 level, respectively