Brrga1-d affects feedback regulation of a putative BrGA3ox gene. Transcript levels of BrGA3ox1 detected by RT-PCR in shoots of 2-week-old Brrga1-d and wild-type (WT) plants with no GA (−) and 2, 4, 8, and 24 h after GA application. The pair of primers used for RT-PCR amplified 2 products (BrGA3ox1a and BrGA3ox1b), both of which show highest homology to At1g15550 (Arabidopsis GA3ox) with score 343 and E-value of 5e-094 for BrGA3ox1a, and score 325 and E-value of 1e-088 for BrGA3ox1b.