| 曹 月1, 2, 吴晗霖1, 黄衍焱3, 张 梅4, 彭云良1, 5, 姬红丽1, 雷树凡2*, 曹步暐1*.西南地区主栽杂交稻对‘宜香优2115’致病性稻瘟菌的抗性[J].植物保护,2025,51(4):363-372. |
| 西南地区主栽杂交稻对‘宜香优2115’致病性稻瘟菌的抗性 |
| Resistance of major hybrid rice cultivars in Southwest China to the rice blast pathogen isolated from‘Yixiangyou 2115’ |
| 投稿时间：2024-09-28 修订日期：2024-11-22 |
| DOI：10.16688/j.zwbh.2024514 |
| 中文关键词: 水稻 西南地区 抗稻瘟病基因 分子标记 |
| 英文关键词:rice Southwest China rice blast resistance gene molecular marker |
| 基金项目:四川省农业科学院人才引进科研启动费项目（NKYRCZX2024016）；国家水稻产业技术体系（CARS-01-40） |
| 作者 | 单位 | E-mail | | 曹 月1, 2, 吴晗霖1, 黄衍焱3, 张 梅4, 彭云良1, 5, 姬红丽1, 雷树凡2*, 曹步暐1* | 1. 四川省农业科学院植物保护研究所, 农业农村部西南作物有害生物综合治理重点实验室, 成都 610066
2. 重庆三峡学院, 重庆三峡农业科学院, 重庆 404020
3. 四川农业大学西南作物基因资源发掘与利用国家重点实验室, 成都 611130
4. 四川省农业农村厅植物保护站, 成都 610041
5. 中国水稻研究所, 杭州 311401 | 雷树凡290277801@qq.com；曹步暐njyzcbw@foxmail.com |
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| 中文摘要: |
| 由Magnaporthe oryzae引起的稻瘟病是威胁西南乃至全国水稻生产最重要的病害之一, 选育和利用抗性品种是控制稻瘟病最经济有效且对环境友好的措施, 但抗性品种因病菌群体毒性发生变化而丧失抗性, 已成为抗性品种选育和利用中的瓶颈问题。为筛选西南地区当前大面积推广品种‘宜香优2115’感染稻瘟病后的接班品种, 本研究于2022年-2023年利用其致病菌在病圃对24个抗病基因供体和西南地区100个杂交稻品种进行了抗性筛选。结果表明在两年间24个抗瘟单基因系均不能稳定表现抗性, 57个杂交稻品种和含有Pigm基因的‘谷梅4号’稳定表现抗病。对42个抗性表现不一的杂交稻所含抗性基因进行了检测, 结果表明, 抗性基因的数目越多, 品种抗性程度和稳定性越好, 含有Pigm或Pi9的基因组合的杂交稻能够稳定抗病, 含有Pikh/Pita/Pib的‘华浙优261’‘国泰香优2号’和‘成优4001’也稳定表现抗病。 |
| 英文摘要: |
| Rice blast, caused by Magnaporthe oryzae, is one of the most destructive diseases threatening rice production in both Southwest China and the entire country. Breeding and deploying resistant cultivars are the most cost-effective and environmentally friendly strategies for controlling rice blast. However, the loss of resistance due to evolving virulence in pathogen populations has become a major bottleneck in resistance breeding and utilization. To identify suitable replacement cultivars for ‘Yixiangyou 2115’, which has recently become susceptible to blast disease in the field, 100 hybrid rice cultivars from Southwest China, the resistant variety ‘Gumei 4’ carrying Pigm and 24 IRBLs containing single blast resistance genes were evaluated in disease nurseries during 2022-2023 using a pathogen strain isolated from ‘Yixiangyou 2115’. The results showed that 57 hybrid rice cultivars and ‘Gumei 4’ consistently exhibited resistance over two years, whereas none of the 24 IRBLs showed stable resistance. PCR analysis of 42 cultivars with varying resistance levels revealed that cultivars with multiple resistance genes generally demonstrated stronger and more stable resistance. Hybrids carrying gene combinations such as Pigm or Pi9 maintained consistent resistance, while cultivars carrying Pikh/Pita/Pib combination, such as ‘Huazheyou 261’ ‘Guotaixiangyou 2’ and ‘Chengyou 4001’, also exhibited stable resistance. |
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