数字农科院2.0

Identification and Analysis of Resistance to Northern Corn Leaf Blight in Maize Germplasm Resources

文献类型： 外文期刊

作者： Bing Meng;Junwei Yang;Lixiu Tong;Qingli Liu;Dongfeng Zhang;Wen Xue Li;Jianjun Wang;Yunbi Xu;Zifeng Guo;Canxing Duan

作者机构：

关键词： 123N;Exserohilum turcicum;heterotic group;NCLB;resistance source

期刊名称： Plants

ISSN： 2223-7747

年卷期： 2025 年 14 卷 20 期

页码：

收录情况： SCIE（2025版）

摘要： Northern corn leaf blight (NCLB), caused by the fungus Exserohilum turcicum, is one of the most significant foliar diseases in maize worldwide, with its severity being highly influenced by environmental conditions. An effective strategy used to control NCLB involves screening diverse maize germplasm for resistant sources through multi-environment inoculation assays, ultimately aiming to develop resistant varieties. This study systematically evaluated 711 maize germplasm accessions with rich genetic diversity. The evaluation was conducted under four location–year environment combinations (Shangluo, Shaanxi Province, China in 2014–2015 and Xinzhou, Shanxi Province, China in 2021–2022) using artificial inoculation with physiological race 123N (or races 1, 2, 3, N). The results showed that the estimated variances of genotype, environment, and genotype-by-environment interaction were all highly significant (p < 0.01). Significant correlations (p < 0.01) were observed among replicates within each environment, with correlation coefficients (r) ranging from 0.67 to 0.88. At the Xinzhou trial in 2021, four replicates were inoculated with four physiological races (1, 2, 3, and N), revealing highly significant correlations (r = 0.77–0.80, p < 0.01) among them. The disease severity of the tropical germplasm was significantly lower (p < 0.001) than that of the temperate germplasm. Among the temperate subgroups, the PA and PB (groups A and B germplasms derived from modern US hybrids) subgroups exhibited lower disease severity, with the PB subgroup showing the lowest, while the Iodent and Reid subgroups exhibited higher susceptibility. The disease severity responses to the four physiological races were highly positively correlated (r = 0.77–0.80, p < 0.001), and their correlations with the composite inoculation (race 123N) ranged from 0.65 to 0.83. Based on the resistance evaluations across four location–year environment combinations, the 711 maize accessions were classified into five categories: 20 were highly resistant, 236 resistant, 205 moderately resistant, 237 susceptible, and 13 highly susceptible. The findings indicate that the tropical germplasm and the temperate PB subgroup are major sources of NCLB resistance.

分类号：

  • 相关文献

[1]玉米中QM同源基因的克隆及其差异表达分析. 王会伟,李洪杰,朱振东,武小菲,王晓鸣. 2009

[2]The Exserohilum turcicum effector EtEC81 reprograms alternative splicing in maize and activates immunity. Haiyue Yu,Xuetao Shi,Na Ning,Hongliang Wu,Jie Mei,Xiaoyu Gu,Hongchun Ruan,Mingcai Zhang,Zhiqiang Li,Shoucai Ma,Wende Liu. 2025

[3]Comparisons of four testers in evaluating 27 CIMMYT and Chinese maize populations. Li, M. S.,Li, X. H.,Deng, L. W.,Zhang, D. G.,Bai, L.,Zhang, S. H.. 2007

[4]Breeding potential of US maize germplasm for utilization in Chinese temperate conditions. Yong, Hongjun,Zhang, Xiaocong,Zhang, Degui,Zhang, Huanxin,Li, Mingshun,Weng, Jianfeng,Hao, Zhuanfang,Ci, Xiaoke,Bai, Li,Li, Xinhai,Zhang, Shihuang,Wang, Jianjun,Liu, Wenguo.

[5]RFLP detection of genetic variation of maize inbred lines. Li, XH,Fu, JH,Zhang, SH,Yuan, LX,Li, MS. 2000

[6]Heterosis and heterotic patterns of maize germplasm revealed by a multiple-hybrid population under well-watered and drought-stressed conditions. Zhi qin SANG,Zhan qin ZHANG,Yu xin YANG,Zhi wei LI,Xiao gang LIU,Yun bi XU,Wei hua LI. 2022

作者其他论文 更多>>