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induction and use of japonica rice mutant R917 with broad-spectrum resistance to blast

机译：粳稻突变体R917的诱导和使用具有广谱抗爆炸

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R917, a japonica rice mutant with broad-spectrum resistance to blast, was isolated from an irradiated population. It was resistant to 136 of 138 isolates collected from different regions in China. The mutant showed a single dominant gene for resistance to races ZB13, ZC15, and ZE3, and was nonallelic to genes present in Chengte 232 and Xiushui 37. Ater inoculation with seven Japanese differentia! strains, R917 showed the same reaction pattern as Toride 1 and differed from the other differential varieties. An allelism test indicated that the resistance genes between R917 and Toride 1 were nonalleiic to Chinese races ZC15 and ZE3. R917 was a semidwarf with strong stem, narrow and erect leaf, and monogenic broad-spectrum resistance to blast. Several lines newly bred using R917 as a donor of blast resistance had the same broad-spectrum resistance to blast as R917 and desirable agronomic traits, indicating no linkage drag between the resistance gene and other important agronomic traits. Recently. R917 has been used as a donor in many rice breeding programs in China.
机译：R917是一种具有广谱抗爆炸的粳稻突变体，与辐照人群分离。它是从中国不同地区收集的138个分离物中的136个。该突变体显示出抗种族Zb13，ZC15和Ze3的抗性的单一显性基因，并且是非相互作的，对Chengte 232和Xiushui 37中存在的基因。ater与七个日本不同的差异接种！菌株，R917显示与扭矩1相同的反应图案，并与其他差分品种不同。等位基因试验表明，R917和致命1之间的抗性基因对中药ZC15和ZE3是非合适的。 R917是一种具有强茎，窄和直立的叶子的半糖，和对爆炸的单身广谱耐药性。使用R917新繁殖的几条线作为抗爆炸的供体具有与R917和理想的农艺性状相同的爆炸抗性，表明抗性基因与其他重要的农艺性状之间没有连杆拖延。最近。 R917已被用作中国许多稻类育种计划中的捐赠者。

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