2015 Fiscal Year Final Research Report
Physiological and genetic studies on grain sink strength of rice plants
| Project/Area Number |
25450026
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Crop production science
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| Research Institution | Ishikawa Prefectural University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | イネ / 登熟 / 評価法 / 籾シンク強度 / QTL |
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| Outline of Final Research Achievements |
The objective of this study was to genetically and physiologically elucidate sink-strength of rice grain, or the ability to attract and accumulate assimilates in grain, which is one of the indispensable plant traits for high-yielding. In this study, the evaluation method for grain-sink-strength was developed, grain-sink-strength of various cultivars were evaluated and chromosome region associating this sink-strength was investigated using chromosome segment substitute lines (CSSLs) derived from a cross between Koshihikari and Kasalath, contrasting in grain-sink-strength. We found an exponential relation between the proportion of filled spikelets and grain-filling percentage. There was a wide difference in the regression coefficients among cultivars and we considered the regression coefficient as the measure for grain-sink-strength. Based on this parameter, we found several chromosome regions which are considered to be associated with grain-sink-strength.
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| Free Research Field |
作物学
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