| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
|
|---|
| Outline of Final Research Achievements |
High temperatures in summer have degraded the quality of rice kernels in various regions in Japan. This is caused by a decrease in perfect kernels with an increase in white immature kernels. The percentage of white immature kernels was analyzed in association with yield-related factors, endosperm cell morphology and panicle dehydration. These result suggested: 1) Higher percentage of white immature kernels was observed in japonica cultivars with thick kernels and in indica cultivars with wide kernels. 2) Less number of cells and larger cell size in endosperm was observed in white immature kernels than in perfect kernels, in inferior spikelets than in superior spikelets, and in high-temperature sensitive cultivars than in high-temperature tolerant cultivars. 3) Water potential in panicles was lower than that in leaves during the day, and decreased with an increase in temperature due to dehydration.
|
