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A rice plant resistant to 5-methyltryptophan (5MT) was selected from mutagenized M3 seeds (Oryza sativa L. var. Sasanishiki) originating from panicles treated with ethylene imine (0.2%) 2 h after flowering. When germinated on 5MT-containing medium, the seeds (M4) from selfed plants segregated with a 3 resistant:1 sensitive ratio, indicating that the plant(More)
A cDNA clone encoding rice tryptophan synthase beta (TSB) was isolated and its transcript level was examined in TR-No. 73, a derivative of a previously isolated rice mutant (TR-1) that is resistant to 5-methyltryptophan. The cDNA sequence of the rice gene for TSB was very similar to that of genes for TSB from other plants. Northern blotting analysis(More)
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