The relative expression of GA metabolic pathway-related genes in the quadruple mutant of GmHY and WT soybean plants. a–d. The expression level of GA biosynthesisrelated genes; e–f The expression level of GA response-related genes. Soybean GmTUB was used as an internal control to normalize all data. The experiment was performed using three biological replicates, and differences were statistically analyzed using Student’s t-test (**P < 0.01). Bars indicate the s.e.m.