2009 Fiscal Year Final Research Report
Identification and characterization of genomic regions that control the capacity of water uptake in rice
| Project/Area Number |
19380009
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Crop science/Weed science
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
HIRASAWA Tadashi Tokyo University of Agriculture and Technology, 大学院・共生科学技術研究院, 教授 (30015119)
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| Co-Investigator(Kenkyū-buntansha) |
OOKAWA Taiichiro 東京農工大学, 大学院・共生科学技術研究院, 准教授 (80213643)
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| Project Period (FY) |
2007 – 2009
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| Keywords | イネ / 気孔伝導度 / 吸水能力 / 光合成速度 / 染色体断片置換系統 / 窒素含量 / 水伝導度 / 量的形質遺伝子座 |
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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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