Rice (Oryza sativa L.) is an important crop for advanced life support, but the height of even full-dwarf cultivars (80-cm tall) has made them difficult to use in controlled environments. We identified a rice mutant that lacks 3ß-hydroxylase, the enzyme responsible for conversion of gibberellic acid 20 (GA20) to GA1 (Murai et al., 1990; Honda et al., 1996). GA1 is the active form of GA in most plants, so this rice variety is extremely short (20-cm tall). ‘Super Dwarf’ rice has a higher harvest index (50%) and similar yield to the commonly used rice cultivars ‘Ai-Nan-Tsao’ and ‘29-Lu-1' and its parent line ‘Shiokari’ (Kinoshita and Shinbashi, 1982). Uniform stand establishment is critical with small research plots. It is therefore important to determine procedures for optimum germination.
Frantz, Jonathan and Bugbee, Bruce, "Unique Procedures for Germinating 'Super Dwarf' Rice" (1999). Dwarf Crops. Paper 13.