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- W2337450801 abstract "Two rice bentazon-lethal mutants,Norin 8m and M8077S,were obtained from japonica and indica rice independently by γ-ray radiation in Japan and China. Both mutants were sensitive to the sulfonylurea herbicides,but insensitive to the other hebicides. Genetic analysis showed that both mutants were controlled by a single recessive gene,and the sensitivities to bentazon and sulfonylurea were controlled by the same gene. Gene mapping,gene cloning and complementation experiment showed that both Norin 8m and M8077S were resulted from a single-base deletion of CYP81A6,a cytochrome P450 gene. A single-base deletion of C at the 507th nucleotide coding sequence starting from ATG of CYP81A6 in Norin 8m were identified,compared with a single-base deletion of G at the 2058th nucleotide in coding sequence starting from ATG of CYP81A6 in M8077S. The bentazon-lethal mutants have been used for hybrid seed reproduction to ensure hybrid seed purity for the two-line hybrid seed production. Three photo-thermo-sensitive genic male sterility (P/TGMS) lines (M8064S,B88S,and B63S) marked with bentazon-lethality and 3 relevant hybrids (Fengliangyou 2,Benliangyou 639,and Benliangyou 9) have been successfully developed and registered in Hubei and Jiangxi Provinces,China. These bentazon-lethal mutants have been also used for mixed-planting hybrid seed production. A bentazon-senstive restorer line MC526 and its matched hybrid combination Hunzhi 1 have been developed successfully. The procedures of mixed planting and the key techniques for mechanized production of hybrid seeds have been set up. The paper also reviewed the future applications of CYP81A6 gene in herbicide resistant rice breeding,the safety control of genetically modified rice and the application prospects of chemical emasculation." @default.
- W2337450801 created "2016-06-24" @default.
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- W2337450801 date "2010-01-01" @default.
- W2337450801 modified "2023-09-23" @default.
- W2337450801 title "Progress on the study of the bentazon sensitive mutants in rice." @default.
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