| Budget Amount *help |
¥20,540,000 (Direct Cost: ¥15,800,000、Indirect Cost: ¥4,740,000)
Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2008: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2007: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
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| Research Abstract |
A high-yielding indica cultivar, Habataki maintains the higher rate of leaf photosynthesis than in the standard Japanese cultivars, Koshihikari and Sasanishiki as a result of the higher hydraulic conductance as well as the higher level of leaf nitrogen. The significant higher hydraulic conductance resulted from the larger root surface area in Habataki. Using progeny populations and lines derived from a cross between Koshihikari (or Sasanishiki) and Habataki, we identified the genomic regions responsible for the hydraulic conductance within a 165-kb region and within a 789-kb region on the long arm of chromosome 4 and on the short arm of chromosome 8, respectively. The designated region on chromosome 4 of Habataki was responsible for the increase in root mass.
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