Supplementary Fig.1 Comparison of early flower mutant recovered from irradiated PLBs at 10 Gy dose with the flower of ‘Emma White’ mother plant

Early flowering mutant 10/46 (b) which, flowered within 9.6 months of ex-vitro growth, was observed with deformity in the floral structure, as the dorsal and the lateral sepals fused with no petals. The lip of the mutant flower appeared slightly rounded with wavy edges and longer side lobes compared to the flower of mother plant (a) of Dendrobium ‘Emma White’ with two petals (P), one dorsal sepal (DS), two lateral sepals (LS), lip (L), and column (C). The mutant plant was numbered according to the radiation dose followed by plant number, i.e., 10 Gy, followed by plant number 46 (10/46).