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Development and evaluation of improved lines with broad-spectrum resistance to rice blast using nine resistance genes

机译：利用九抗基因的稻瘟病耐水稻抗稻瘟病的改进线的发展与评价

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Abstract BackgroundRice blast disease is a major restriction in rice production. That is usually managed using chemical pesticides, which are expensive in terms of cost and environment hazards. Use of blast-resistance genes to develop resistant varieties may therefore be a more economical and environmentally friendly method for effective control.ResultsIn this study, we improved the blast resistance of four sterile lines, Y58S, GuangZhan63S (GZ63), C815S and HD9802S, by introgression of 9 cloned broad-spectrum blast resistance genes Pi37 , Pit , Pid3 , Pigm , Pi36 , Pi5 , Pi54 , Pikm and Pb1 . Through molecular marker-assisted selection and backcross breeding, 31 single-gene derived lines and 20 double-gene combination lines were obtained. When infected naturally, single-gene lines with Pigm or Pid3 showed significantly enhanced resistance during whole growth period relative to their recurrent parent. Single-gene lines with Pi37 , Pi5 , Pit , Pi36 , Pi54 or Pikm showed significantly enhanced resistance in some of the four backgrounds. No obviously enhanced resistance was observed in single-gene line with Pb1 for the whole growth period. Compared with recurrent parents, most of the double-gene lines showed improved resistance. Among these double-gene lines, lines with Pi37 / Pid3 , Pi5 / Pi54 , Pi54 / Pid3 or Pigm/Pi37 , exhibited significantly enhanced resistance and observable additive effects.ConclusionsTwo blast resistance genes, Pigm and Pid3 , showed significantly enhanced resistance for the whole rice growth period, and six blast resistance genes Pi37 , Pi5 , Pit , Pi36 , Pi54 or Pikm showed significantly enhanced resistance for some of the four backgrounds. Double-gene lines with Pi37 / Pid3 , Pi5 / Pi54 , Pi54 / Pid3 and Pigm/Pi37 exhibited significantly enhanced resistance and observable additive effects. These lines could be used in rice hybrid and production.
机译：摘要背景爆炸疾病是水稻生产的主要限制。这通常是使用化学杀虫剂进行管理的，这在成本和环境危害方面都是昂贵的。因此，使用抗抗抗基因产生抗性品种，因此可能是一种更经济和环保的有效控制方法。研究本研究，我们改善了四条无菌线，Y58s，广哲63s（GZ63），C815s和HD9802s的抗爆炸抗性9克隆宽谱抗抗抗抗抗基因PI37，坑，PID3，PIGM，PI36，PI5，PI54，PIKM和PB1的迟发。通过分子标记辅助选择和回复育种，得到31根单基因衍生的线和20根双基因组合线。当自然感染时，具有仔猪或PID3的单基因系在整个生长期相对于其复发父母中显示出显着提高的抗性。具有PI37，PI5，PIT，PI36，PI54或PIKM的单基因系在四个背景中的一些背景下显示出显着增强的抗性。在整个生长期的单基因系中，在单基因系中没有明显增强抗性。与复发性父母相比，大多数双基因系列显示出改善的抗性。在这些双基因系中，具有PI37 / PID3，PI5 / PI54，PI54 / PID3或PIGM / PI37的系列表现出显着增强的抗性和可观察到的添加剂效应。结论抗抗抗抗基因，PIGM和PID3，对整体显着提高了抗性水稻生长期和六种抗抗抗抗基因PI37，PI5，坑，PI36，PI54或PIKM对四个背景中的一些抗性显着提高。具有PI37 / PID3，PI5 / PI54，PI54 / PID3和PIGM / PI37的双基因系表现出显着提高的抗性和可观察的添加剂效应。这些线可用于稻米混合和生产。

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