Thermo-sensitive action of an earliness gene Ef-x in rice, Oryza sativa L.
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- SATO Shigetoshi
- College of Agriculture, University of the Ryukyus
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- OGATA Kayoko
- College of Agriculture, University of the Ryukyus
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- SHINJYO Choyu
- College of Agriculture, University of the Ryukyus
Bibliographic Information
- Other Title
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- イネ早生遺伝子Ef-xの感温作用
- イネ早生遺伝子Ef-xの感温作用〔英文〕
- イネ ワセ イデンシ Ef-x ノ カンオン サヨウ エイブン
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Abstract
An extremely early line of rice, T65·ER-20, was bred after 8 times of backcrossings, using two early heading lines, Kokusyokuto-2 harboring several unknown earliness genes besides the earliness gene Ef-1 as a donor parent of earliness genes, and an isogenic line of Taichung 65 (T65) harboring the Ef-1 gene (T65·ER-1) as a recurrent parent. Since extremely early and early individuals segregated in a 3:1 ratio in the B8F2 generation and in a 1:1 ratio in the B9F1, T65·ER-20 harbors a new dominant earliness gene, Ef-x, besides the Ef-1 gene. T65·ER-21 having the new earliness gene was also bred.<br> Segregation mode for heading time in F2 plants showing disgenic segregation for two earliness genes, Ef-1 and Ef-x, was different between experiments conducted in the natural field and in the green house field. Extremely early, early and late individuals segregated in a 9:3:4 ratio in the former and in a 9:6:1 ratio in the latter. Then, the Ef-x gene was asserted to show an allele specific interaction to genes on the Ef-1 locus, and an action for earliness by itself was accelerated in the high temperature condition. A screening test surveying a chromosome carrying the Ef-x gene by the use of 40 RT-lines implied that it located on the second chromosome.<br>
Journal
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- The Japanese Journal of Genetics
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The Japanese Journal of Genetics 67 (6), 473-482, 1992
The Genetics Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001205444052608
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- NII Article ID
- 10006699823
- 30018517769
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- NII Book ID
- AA00690924
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- COI
- 1:CAS:528:DyaK3sXlvFOjs7s%3D
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- ISSN
- 18805787
- 0021504X
- http://id.crossref.org/issn/0021504X
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- NDL BIB ID
- 3813028
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed