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'Super Dwarf' Rice: Temperature Studies, Steve Klassen, Bruce Bugbee
'Super Dwarf' Rice: Temperature Studies, Steve Klassen, Bruce Bugbee
Dwarf Crops
Detailed temperature studies are a prerequisite to the optimization of crop productivity because field studies at ambient CO2 provide only a general guide to optimal temperatures. Meristem temperature has a profound effect on crop development rate, and the optimum temperature usually decreases as the crop matures. Previous studies with semi-dwarf rice (Ai-nan-tsao & 29-Lu-1) indicated that temperatures above about 33 ºC reduce seed set if they occur during anthesis. In rice, high temperatures are especially detrimental if there is rapid dark-to-light temperature increase. Conversely, average day/night temperatures in the mid 20's delay heading and cause an undesirable increase in vegetative …
'Usu-Apogee' Wheat - Registration, Bruce Bugbee, G. Koerner, R. Albrechtsen, W. Dewey, S. Clawson
'Usu-Apogee' Wheat - Registration, Bruce Bugbee, G. Koerner, R. Albrechtsen, W. Dewey, S. Clawson
Dwarf Crops
'USU-Apogee' is a full-dwarf hard red spring wheat (Triticum aestivum L.) (NSSL Reg. no. 331390.01; PI 592742) cultivar developed for high yields in controlled environments. USU-Apogee was developed by the Utah Agricultural Experiment Station in cooperation with the National Aeronautics and Space Administration and released in April 1996. NASA is interested in improved food crops for bioregenerative life support systems in space.
Apogee is the point in an orbit farthest from the earth. USU-Apogee is a shorter, higher yielding alternative to 'Yecora Rojo' and 'Veery-10', the short field cultivars previously selected for use in controlled environments (Bugbee and Salisbury, 1988). …
Unique Procedures For Germinating 'Super Dwarf' Rice, Jonathan Frantz, Bruce Bugbee
Unique Procedures For Germinating 'Super Dwarf' Rice, Jonathan Frantz, Bruce Bugbee
Dwarf Crops
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 …
Yield Comparisons And Unique Characteristics Of The Dwarf Wheat Cultivar 'Usu-Apogee', Bruce Bugbee, G. Koerner
Yield Comparisons And Unique Characteristics Of The Dwarf Wheat Cultivar 'Usu-Apogee', Bruce Bugbee, G. Koerner
Dwarf Crops
Extremely short, yet high yielding cultivars of all crop plants are needed to optimize the food production of bioregenerative life support systems in space. In the early 1980's, we examined over a thousand wheat genotypes from the world germplasm collection in search of genotypes with appropriate characteristics for food production in space. Here we report the results of 12 years of hybridization and selection for the perfect wheat cultivar. 'USU-Apogee' is a full-dwarf hard red spring wheat (Triticum aestivum L.) cultivar developed for high yields in controlled environments. USU-Apogee was developed by the Utah Agricultural Experiment Station in cooperation with …