Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 14 of 14
Full-Text Articles in Entire DC Network
‘Earligreen’ A Super-Dwarf Pea Cultivar For Use In Controlled Environment Research, Joseph F. Romagnano, Emily Mills, Bruce Bugbee
‘Earligreen’ A Super-Dwarf Pea Cultivar For Use In Controlled Environment Research, Joseph F. Romagnano, Emily Mills, Bruce Bugbee
Dwarf Crops
Earligreen is ideal for controlled environment studies due to its fast life cycle, short height, and excellent growth in low light. Earligreen peas typically grow 18 to 35 cm tall and flower 20 to 25 days after emergence with the first fresh seed ready at 40 days. Optimal temperature is 20 to 25˚C. Earligreen grows well under a wide range of light levels (photosynthetic photon flux (PPF), 100 to 1000 µmol m-2 s-1) and a photoperiod of 16 to 24 hours. Leaves display a characteristic silver speckling pattern.
Earligreen was developed in 1950 at the Morden research station in Manitoba, …
Dwarf Crop Response To A 16 Or 24 Hr Photoperiod Under Low-Light Conditions, Joseph F. Romagnano, Emily Mills, Bruce Bugbee
Dwarf Crop Response To A 16 Or 24 Hr Photoperiod Under Low-Light Conditions, Joseph F. Romagnano, Emily Mills, Bruce Bugbee
Dwarf Crops
Plants were grown in ambient lab conditions under cool white fluorescent lights at a PPF of 90 µmol m-2 s-1 and a photoperiod of either 16 or 24 hours. Plants were watered with tap water once each day. Nutrients were supplied by Osmocote Plus slow-release fertilizer mixed into the media at approximately 7 g per 2 L pot.
Rice, and soybeans become excessively elongated and could not practically be grown at this low light level. Tomatoes, peppers and peas were successfully grown. The life cycle for peas and peppers was two to three times longer than in higher light. Triton …
Summary Data From Five Years Of Dwarf Wheat Yield Trials, Usu Crop Physiology Lab
Summary Data From Five Years Of Dwarf Wheat Yield Trials, Usu Crop Physiology Lab
Dwarf Crops
Dataset that selections from the cross "Super-Dwarf x Parula", the same cross that created Apogee.
Historical Summary Of The Selection Of Usu-Perigee, Usu Crop Physiology Lab
Historical Summary Of The Selection Of Usu-Perigee, Usu Crop Physiology Lab
Dwarf Crops
USU-Apogee was back-crossed with line 3-2-3 in 1999 to get an improved super dwarf wheat. Sixty-eight seeds were planted from the F1 generation. This table summarizes the two year selection process from F2 to F10 generations. USU-Perigee is the same height as Super-Dwarf but yields 30% better.
Temperature Sensitivity Of Four Tomato Cultivars, Jonathan M. Frantz, Justin Robinson, Bruce Bugbee
Temperature Sensitivity Of Four Tomato Cultivars, Jonathan M. Frantz, Justin Robinson, Bruce Bugbee
Dwarf Crops
We evaluated 4 tomato cultivars, selected based on height (Red Robin and Micro-Tom) and familiarity (Pixie and Reimann Philipp) for their sensitivity to temperature. Each cultivar was grown in four 12-cm pots from seeding to form canopies in either 30/25 or 25/20 °C day/night temperature.
Yield of all cultivars except Reimann Philipp decreased with warmer temperatures with Red Robin and Pixie showing the most sensitivity. Fresh yield of the two dwarf varieties were lower than the taller cultivars, but due to higher percent dry matter in the fruit of the Micro-Tom and Red Robin (see Cultivar Screening summary), the dry …
Instructions For Growing Dwarf Crop Plants Under Electric Lights, Bruce Bugbee
Instructions For Growing Dwarf Crop Plants Under Electric Lights, Bruce Bugbee
Dwarf Crops
An instructional guide on how to grow dwarf crop plants under electric lights.
Anaerobic Conditions Improve Germination Of A Gibberellic Acid Deficient Rice, Jonathan Frantz, Bruce Bugbee
Anaerobic Conditions Improve Germination Of A Gibberellic Acid Deficient Rice, Jonathan Frantz, Bruce Bugbee
Dwarf Crops
Dwarf plants are useful in research because multiple plants or plant communities can be grown in small growth chambers. We have studied a gibberellic acid (GA) mutant of rice (Oryza sativa japonica cv. 'Shiokari' line N-71) that is extremely dwarf (20-cm tall). Unfortunately, this GA mutation is associated with poor germination (70%) under aerobic conditions. Neither exogenous GA, nor a dormancy-breaking heat treatment improved germination. However, excellent germination (95%) was achieved by germinating the seeds anaerobically, either in a pure N2 environment or submerged in unstirred tap water.
Response Of Micro-Tom To Low Light, Jonathan M. Frantz, Justin Robinson, Bruce Bugbee
Response Of Micro-Tom To Low Light, Jonathan M. Frantz, Justin Robinson, Bruce Bugbee
Dwarf Crops
Yield is proportional to light absorption, but maximum light cannot always be supplied to crops in either space station production settings or in teaching situations. It is therefore important to determine how crops grow in light-limited conditions. ‘Micro-Tom’ tomato was grown in fluorescent light under shade cloth to provide 100, 200, and 300 µmol m-2 s-1 for 16-h photoperiods at 26/22 °C for 117 days.
Yield and harvest index increased as light increased. There were significant amounts of unripe fruit after 117 days. During ripening, the fraction of dry matter decreases within the fruit.
The higher yield was likely due …
Plant Deficiencies And Toxicities Of Soybean And Sunflower, Usu Crop Physiology Lab
Plant Deficiencies And Toxicities Of Soybean And Sunflower, Usu Crop Physiology Lab
Dwarf Crops
Plant deficiencies and toxicities of soybean and sunflower.
'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 …
Utah State University Develops Space Crop, Nasa
Utah State University Develops Space Crop, Nasa
Dwarf Crops
The first crop developed specifically for growth in space has been developed at Utah State University, Logan, Utah.
USU-Apogee, a space-age wheat variety, produces the equivalent of almost 600 bushels of grain per acre-- three times the top yields from fields.