| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
It is known that there is the genetic difference in the strength to control the filling priority of grains within the panicle (SCFP) in rice. In this experiment, several cultivars and lines (CL) differing SCFP were used. Low source/sink condition delayed early growth of inferior grains attached to the lower position of panicle, and consequently started the dry matter accumulation of grains within the panicle asynchronously, and lowered filling and quality of inferior grains in CL with strong SCFP. Oppositely low source/sink condition did not delay early growth of inferior grains, and started the dry matter accumulation grains within panicle synchronously, and did not lowered filling and quality of inferior of grains in CL with weak SCFP. For this reason, it was indicated that the delay of early grain growth reduce activities of several enzymes related to starch synthesize during dry matter accumulation stage, consequently reduce starch synthesizing ability itself.
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