| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
We hypothesize that nitrogen allocation to rice grains is mostly determined by the grain-protein-accumulation ability which is genetically determined and is not affected by environments and aim to clarify the grain-protein-accumulation ability genetically and physio-ecologically. We developed a quantitative measure for the evaluation of grain-protein-accumulation ability, compared it among rice cultivars and selected two cultivars, one with high and one with low grain-protein-accumulation ability. Using these cultivars as parents we developed F2 and F3 populations. QTL (quantitative trait loci) analysis with these populations revealed that several QTLs contributed grain-protein-accumulation ability. Among these QTLs, two QTLs were detected in both generations and both nitrogen conditions. We now are developing near isogenic lines with the introgression of chromosome segments of the other parent’s genotype at these two QTL regions to validate the effect of these QTLs.
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