Wang Kai, Fu Chenjian, Fu Xingxue, Qin Peng, Hu Xiaochun, Zhang Xuanwen, Deng Zhao, Yan Tianze, Jiang Nan, Li Yanfeng, Fu Jun, Deng Yiwen, Zhou Yanbiao, Xiao Gui, He Zuhua, Yang Yuanzhu
State Key Laboratory of Hybrid Rice, Key Laboratory of Southern Rice Innovation & Improvement, Ministry of Agriculture and Rural Affairs, Hunan Engineering Laboratory of Disease and Pest Resistant Rice Breeding, Yuan Longping High-Tech Agriculture Co., Ltd, Changsha, 410128 China.
Department of Botany, College of Life Sciences, Hunan Normal University, Changsha, 410081 China.
Mol Breed. 2025 Mar 25;45(4):35. doi: 10.1007/s11032-025-01555-3. eCollection 2025 Apr.
Rice blast, caused by the fungal pathogen , is one of the most destructive diseases of rice worldwide. The utilization of host resistance () genes in rice breeding program is considered as the most economical, effective, environment-friendly strategy for rice blast control. The gene , shows high, broad-spectrum and durable resistance to rice blast. Here, we report the successful integration of into Longke638S (LK638S), an elite thermo-sensitive genic male sterile (TGMS) line in hybrid rice production in China. The integration significantly enhanced the blast resistance of LK638S and the derived hybrid varieties demonstrated exceptional performance in both yield and blast resistance. The improved line Longzhen36S (LZ36S), which recovered 91.84% of the recurrent parent genome. LZ36S exhibited a high blast resistance frequency of 96.4% against 28 blast isolates. Furthermore, the LZ36S-derived hybrids exhibited enhanced resistance to both seedling and panicle blast compared to LK638S-derived hybrids carrying the heterozygous gene, all without yield penalty. A total of ninety LK638S derived hybrid varieties have been state or provincial approved and certified with an annual promoting area exceed 964.0 thousand hectares. The LZ36S-derived hybrids can serve as improved versions with enhanced blast resistance, making them viable replacements for LK638S-derived hybrids in commercial production. Moreover, sixteen LZ36S-derived hybrid varieties, all possessing moderate (MR) or high (R) level blast resistance, along with excellent yield and grain quality, have been state or provincial approved and certificated. These LZ36S-derived hybrids show great potential for rapid commercialization, with promoting area of ~ 200 thousand hectares by 2023.
The online version contains supplementary material available at 10.1007/s11032-025-01555-3.
由真菌病原体引起的稻瘟病是全球最具破坏性的水稻病害之一。在水稻育种计划中利用宿主抗性（）基因被认为是控制稻瘟病最经济、有效、环保的策略。基因对稻瘟病表现出高抗性、广谱性和持久抗性。在此，我们报告了将成功整合到隆科638S（LK638S）中，隆科638S是中国杂交水稻生产中的一个优良温敏核不育系（TGMS）。这种整合显著增强了LK638S的抗稻瘟病能力，并且衍生的杂交品种在产量和抗稻瘟病方面都表现出优异的性能。改良系龙珍36S（LZ36S），恢复了轮回亲本基因组的91.84%。LZ36S对28个稻瘟病菌株表现出96.4%的高抗稻瘟病频率。此外，与携带杂合基因的LK638S衍生杂交品种相比，LZ36S衍生杂交品种对苗瘟和穗瘟的抗性增强，且均无产量损失。共有90个LK638S衍生杂交品种获得国家或省级审定和认证，年推广面积超过96.4万公顷。LZ36S衍生杂交品种可作为抗稻瘟病增强的改良版本，使其在商业生产中成为LK638S衍生杂交品种的可行替代品。此外，16个LZ36S衍生杂交品种，均具有中等（MR）或高（R）水平的抗稻瘟病能力，以及优异的产量和稻米品质，已获得国家或省级审定和认证。这些LZ36S衍生杂交品种显示出巨大的快速商业化潜力，到2023年推广面积约为20万公顷。
在线版本包含可在10.1007/s11032-025-01555-3获取的补充材料。
