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 |
Section | 一般 |
Research Field |
Crop production science
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Research Institution | Ishikawa Prefectural University |
Principal Investigator |
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | イネ / 登熟 / 評価法 / 籾シンク強度 / QTL / 登熟籾生産効率 / 登熟斉一性 / 水稲 |
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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Report
(4 results)
Research Products
(9 results)
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[Journal Article] Detection of QTLs for white-back and basal-white grains caused by high temperature during ripening period in <i>japonica</i> rice2015
Author(s)
Wada T., Miyahara K., Sonoda J., Tsukaguchi T., Miyazaki M., Tsubone M., Ando T., Ebana K., Yamamoto T., Iwasawa N., Umemoto T., Kondo M. and Yano M.
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Journal Title
Breeding Science
Volume: 65
Issue: 3
Pages: 216-225
DOI
NAID
ISSN
1344-7610, 1347-3735
Related Report
Peer Reviewed / Open Access
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