<p>High sensitivity of seed production traits in rice (<i>Oryza sativa</i> L.,) to exogenous gibberellin (GA₃) increases the rate of outcrossing seed set in cytoplasmic male sterile (CMS) lines. In this study, 506 rice genotypes were used to mine favorable marker alleles for high exogenous GA₃ sensitivity of flag leaf length (FLL), the flag leaf angle (FLA), and panicle exertion length (PEL) traits. Two hundred and sixty-two simple sequence repeats (SSR) markers were used for genome-wide association analysis (GWAS) of FLL, FLA, and PEL traits by general linear model (GLM). The heritability in the broad sense of the seed production traits ranged from 82.52 (PEL) to 85.17% (FLA). The index of GA₃ sensitivity (IGS) ranged from 23.57 (FLL) to 121.09% (FLA). Eight, six, and nine loci have been significantly detected to be associated with the GA₃ sensitivity of FLL, FLA, and PEL, respectively. Based on the phenotypic effect value (PEV) of the marker allele with a negative effect on GA₃ sensitivity, eighteen favorable marker alleles were detected, and the RM457-185 bp marker allele showed the highest reduced PEV for FLL (-3.82 cm). Marker alleles with a positive effect on GA₃ sensitivity, twenty and thirty-two favorable marker alleles were identified along with RM20-110 bp (19.60°), and RM489-230 bp (2.51 cm) marker allele depicts the highest positive PEV for FLA, and PEL, respectively. Furthermore, in relation to the distribution of favorable alleles among accessions studied and their PEV values, the five best parental combinations that could improve GA₃ sensitivity of seed production traits were predicted. The identified favorable marker alleles and predicted parental combinations offer valuable tools for enhancing GA₃-responsive seed production traits in hybrid rice breeding.</p>