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RppM, Encoding a Typical CC-NBS-LRR Protein, Confers Resistance to Southern Corn Rust in Maize

文献类型： 外文期刊

作者： Wang, Shuai 1 ; Wang, Xiaqing 1 ; Zhang, Ruyang 1 ; Liu, Qian 1 ; Sun, Xuan 1 ; Wang, Jidong 1 ; Wang, Yuandong 1 ; Xing, Jinfeng 1 ; Liu, Ya 1 ; Zhao, Yanxin 1 ; Shi, Zi 1 ; Su, Aiguo 1 ; Li, Chunhui 1 ; Xiao, Senlin 1 ; Jiao, Yanyan 1 ; Li, Zhiyong 1 ; Wang, Ronghuan 1 ; Song, Wei 1 ; Zhao, Jiuran 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Maize Res Inst, Beijing Key Lab Maize DNA Fingerprinting & Mol Bre, Beijing, Peoples R China

关键词： maize; RppM; Southern corn rust (SCR); resistance gene; Kompetitive allele-specific PCR markers; marker-assisted selection (MAS)

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Southern corn rust (SCR) caused by Puccinia polysora Underw. poses a major threat to maize production worldwide. The utilization of host SCR-resistance genes and the cultivation of resistant cultivars are the most effective, economical strategies for controlling SCR. Here, we identified and cloned a new SCR resistance gene, RppM, from the elite maize inbred line Jing2416K. RppM was found to encode a typical CC-NBS-LRR protein localized in both the nucleus and cytoplasm. This gene was constitutively expressed at all developmental stages and in all tissues examined, with the strongest expression detected in leaves at the mature stage. A transcriptome analysis provided further evidence that multiple defense systems were initiated in Jing2416K, including pathogen-associated molecular pattern-triggered immunity and effector-triggered immunity, reinforcement of cell walls, accumulation of antimicrobial compounds, and activation of phytohormone signaling pathways. Finally, we developed functional Kompetitive allele-specific PCR markers for RppM using two conserved SNP sites and successfully applied these functional markers for the detection of RppM and the cultivation of resistant maize cultivars, demonstrating their great potential utility in maize breeding.

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