| 摘要: |
| 【目的】评价12S、M76A、闽香A、明兴A、延源A、福丰5A和福香1A 7种水稻育种亲本对福建省稻瘟病的抗病性，为水稻抗病育种及抗病品种合理布局提供参考。【方法】采用田间自然诱发的方法，测定7种供试水稻育种亲本对水稻叶瘟和穗颈瘟的抗病性；并采用室内人工接种法，测定7种供试水稻育种亲本对水稻苗瘟的抗病性及对福建省稻瘟病菌4个主要致病型的抗性频率。【结果】M76A、明兴A、延源A、福丰5A及福香1A对苗瘟的抗性频率均大于75%，其中M76A、福丰5A、福香1A对叶瘟、穗颈瘟也均表现出较高的抗病性，而明兴A、延源A较感叶瘟和穗颈瘟，12S、闽香A较感苗瘟、叶瘟和穗颈瘟；明兴A、延源A、福丰5A对福建省稻瘟病菌4个主要致病型 I34.1、I24.1、I36.1和I35.1菌株的抗性频率均较高，而M76A、福香1A分别对I24.1和 I36.1菌株的抗性频率较低，12S对I34.1和I36.1 2个致病型菌株的抗性频率均较低，闽香A对I34.1、I36.1和I35.1 3个致病型菌株的抗性频率均较低。【结论】M76A、福丰5A和福香1A对福建省稻瘟病的抗病性较强，可作为抗瘟育种的候选亲本；明兴A、延源A、12S和闽香A则应与抗病性较强的恢复系杂交育种。 |
| 关键词: 稻瘟病菌 抗性频率 抗瘟基因 育种亲本 |
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| 基金项目:公益性行业（农业）科技专项（201203014）；福建省省属公益类科研院所基本科研专项（2015R1024-1）；福建省科技厅项目（2009N2005） |
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| Resistances of seven rice breeding parents to Magnaporthe grisea in Fujian |
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DU Yi-xin,SHI Niu-niu,RAUN Hong-chun,et al
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| Abstract: |
| 【Objective】This study evaluated the resistances of seven rice breeding parents (12S,M76A,Minxiang A,Mingxing A,Yanyuan A,Fufeng 5A and Fuxiang 1A) to Magnaporthe grisea to provide references for breeding and distribution of resistant rice cultivars.【Method】The resistances of seven tested rice breeding parents to rice leaf blast and rice panicle blast were also determined under nature induction condition.The resistances of seven tested rice breeding parents to rice seedling blast and their resistance frequencies to four main pathotypes of M.grisea were assayed by artificial inoculation in greenhouse.【Result】The resistance frequencies of M76A,Mingxing A,Yanyuan A,Fufeng 5A and Fuxiang 1A to M.grisea were all above 75%.M76A,Fufeng 5A and Fuxiang 1A also showed high resistance to rice leaf blast and rice panicle blast.Mingxing A and Yanyuan A were susceptible to both rice leaf blast and rice panicle blast,and 12S and Minxiang A were susceptible to rice seedling blast,rice leaf blast and rice panicle blast.Mingxing A,Yanyuan A and Fufeng 5A possessed high resistance frequencies to four strains (I34.1,I24.1,I36.1 and I35.1) of main pathotypes in Fujian,while M76A and Fuxiang 1A showed low resistance frequencies to strains I24.1 and I36.1,respectively.12S showed low resistance frequencies to strains I34.1 and I36.1 and Minxiang A showed low resistance frequencies to strains I34.1, I36.1 and I35.1.【Conclusion】The resistances of M76A,Fufeng 5A and Fuxiang 1A to M.grisea in Fujian were strong and they could be used as candidate parents for rice breeding.Mingxing A,Yanyuan A,12S and Minxiang A should be hybridized with restorer lines that had strong resistance to M.grisea. |
| Key words: Magnaporthe grisea resistance frequency Pi gene breeding parent |
