| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Research Abstract |
To identify novel genes controlling flowering time in rice, flowering time mutants were investigated. High resolution molecular marker analyses showed that an early flowering time mutant, HS112, harbored a mutation in the gene(Os03g0151300) in chromosome 3, and another early flowering time mutant, HS254, harbored a mutant gene in chromosome 10. It is not reported that these genes involve in controlling flowering time. Therefore, it is considered that these genes are novel flowering time genes, called Se14 and Se15. Expression analyses demonstrated that a flowering time gene, Ehd1, was highly up-regulated under long-day condition in both of these mutants. These results indicate that Se14 and Se15 repress the expression of Ehd1 under long-day condition. Multiple mutants based on known mutant lines, X61, HS169 and double-mutant line of these two lines, were obtained. In total 15, 000 lines, 168 plants were selected as flowering time mutants. These novel mutants will provide us new knowledge to understand how to control flowering time in rice.
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