Trisomic Analysis of a Lateness Gene ef2 in Rice, Oryza sativa L.
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概要
- 論文の詳細を見る
The lateness gene ef2(t), formerly designated as lf-l, was induced by X-ray irradiation applied to a rice variety Taichung 65. The present study was performed to investigate the allelic relationship between ef2(t) and two earliness genes, Efx and Efl, and the chromosomal location through trisomic analysis. Rice line T65-ef2(t) carrying gene ef2(t) was crossed with two tester lines, T65-ER-21 and T65-ER-1 harboring the earliness genes, Efx and Efl, respectively and heading time in the F_2 plants was examined. F_2 plants of the cross T65-ef2(t)/T65-ER-21 showed a trimodal distribution : T65-ER-21 and T65 type, new type and T65-ef2(t) type. The F_2 segregation fitted to a 12 : 3 : 1 expected ratio. On the other hand, the F_2 plants of the cross T65-ef2(t)/T65-ER-1 exhibited a tetramodal distribution : T65-ER-1 type, T65 type, new type and T65-ef2(t) type, the segregation fitting to a 9 : 3 : 3 : 1 expected ratio. These results suggested that ef2(t) was non-allelic to both Efx and Efl. Trisomic analysis was performed using seven Triplo lines carrying extra chromosomes 2, 4, 5, 7, 9, 10 and 12, respectively. The trisomics were used as maternal parent for crossing with T65-ef2(t). Heading time in the F_2 plants obtained from self-pollination of F_1 plants (trisomics) was examined. F_2 population derived from a cross between T65-ef2(t) and Triplo 9 showed a typical trisomic segregation pattern, suggesting that ef2(t) was located on chromosome 9.
- 日本育種学会の論文
著者
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Nose Akihiro
Faculty of Agriculture, Saga University
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MURAYAMA Seiichi
Faculty of Agriculture, University of the Ryukyus
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Adaniya Shinichi
Faculty Of Agriculture University Of The Ryukyus
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Murayama Seiichi
Faculty Of Agriculture University Of The Ryukyus
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Nose Akihiro
Coll. Of Agr. Univ. Of The Ryukyus.
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Nose Akihiro
Faculty Of Agricultural Saga University
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Motomura Keiji
Faculty of Agriculture, University of the Ryukyus
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Motomura Keiji
Faculty Of Agriculture University Of The Ryukyus
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Khun Leang
Faculty of Agriculture, University of the Rykyus
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Nose A
Faculty Of Agriculture Saga University
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Khun Leang
Faculty Of Agriculture University Of The Ryukyus
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