| Project/Area Number |
22580020
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kinki University |
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Principal Investigator |
KATO Tsuneo 近畿大学, 生物理工学部, 教授 (70149748)
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| Co-Investigator(Renkei-kenkyūsha) |
HORIBATA Akira 近畿大学, 生物理工学部, 講師 (70258060)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | イネ / 極穂重型品種 / 登熟 / ADPグルコースピロホスホリラーゼ / ショ糖トランスポーター / 塩基配列 / イネ極穂重型品種 / ADPグルコースピロホスホリラーゼ大サブユニット / ADPグルコースピロホスホリラーゼ小サブユニット / 分子マーカー / 塩基配列多型 / 対立遺伝子 / 定量PCR / 多重PCR / 粒重増加過程 |
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| Research Abstract |
Alleles for good grain filling contributing to the improvement of poor grain filling in extra-heavy panicle types of rice were explored. As a result, APS2-2, APL2-2 and SUT1-1 at the locus for ADPglucose pyrophosphorylase (AGPase) small subunit 2 (OsAGPS2), large subunit 2 (OsAGPL2) and sucrose transporter 1 (OsSUT1), respectively, were detected as candidate alleles. The cultivars with all of these three alleles showed higher AGPase activity in developing endosperm, and higher degree of grain filling at maturity. Among these three alleles, APL2-2 might display the highest effect on grain filling. These three alleles tended to be included together in indica cultivars. Therefore, alleles for good grain filling should be searched among indica rice cultivars to serve the poor grain filling problems. However, these alleles could not contribute directly to higher yield.
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