Publication Date
1985
Location
Kyoto Japan
Description
advance two generations a year was designed and demonstrated by using two cultivars with different maturity. The method consisted of the following five procedures; 1) growing of seedlings under 24 hr day-length at day/night temperature of 25°C/15°C, 2) floral induction treatment under 10 hr day-length at 10°C, 3) promotion of the period from inflorescence differentiation to seed ripening under 24 hr day-length at the temperature which increased gradually from 15°C to 24°C, 4) air-drying of freshly harvested seeds at room temperature, and 5) breaking of seed dormancy by prechilling at 50°C.
Germinable seeds were obtained from more than 90 percent of individuals used in succesive two generations. There were little differences in heading date between cultivars, and the inter-plant variations in heading date within each cultivar were rather small. These results indicated that the present method could be applied to any materials with widely different maturity under natural conditions. Some future problems were discussed.
Citation
Ikegaya, F; Kawabata, S; and Sato, S, "A Method of Accelerating Generation-Cycles in Orchardgrass" (1985). IGC Proceedings (1985-2023). 6.
(URL: https://uknowledge.uky.edu/igc/1985/ses2/6)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
A Method of Accelerating Generation-Cycles in Orchardgrass
Kyoto Japan
advance two generations a year was designed and demonstrated by using two cultivars with different maturity. The method consisted of the following five procedures; 1) growing of seedlings under 24 hr day-length at day/night temperature of 25°C/15°C, 2) floral induction treatment under 10 hr day-length at 10°C, 3) promotion of the period from inflorescence differentiation to seed ripening under 24 hr day-length at the temperature which increased gradually from 15°C to 24°C, 4) air-drying of freshly harvested seeds at room temperature, and 5) breaking of seed dormancy by prechilling at 50°C.
Germinable seeds were obtained from more than 90 percent of individuals used in succesive two generations. There were little differences in heading date between cultivars, and the inter-plant variations in heading date within each cultivar were rather small. These results indicated that the present method could be applied to any materials with widely different maturity under natural conditions. Some future problems were discussed.
