Cloning southern corn rust resistant gene RppK and its cognate gene AvrRppK from Puccinia polysora

Broad-spectrum resistance has great values for crop breeding. However, its mechanisms are largely unknown. Here, we report the cloning of a maize NLR gene, RppK, for resistance against southern corn rust (SCR) and its cognate Avr gene, AvrRppK, from Puccinia polysora (the causal pathogen of SCR). Th...

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Detalles Bibliográficos
Autores principales: Chen, Gengshen, Zhang, Bao, Ding, Junqiang, Wang, Hongze, Deng, Ce, Wang, Jiali, Yang, Qianhui, Pi, Qianyu, Zhang, Ruyang, Zhai, Haoyu, Dong, Junfei, Huang, Junshi, Hou, Jiabao, Wu, Junhua, Que, Jiamin, Zhang, Fan, Li, Wenqiang, Min, Haoxuan, Tabor, Girma, Li, Bailin, Liu, Xiangguo, Zhao, Jiuran, Yan, Jianbing, Lai, Zhibing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9338322/
https://www.ncbi.nlm.nih.gov/pubmed/35906218
http://dx.doi.org/10.1038/s41467-022-32026-4
Descripción
Sumario:Broad-spectrum resistance has great values for crop breeding. However, its mechanisms are largely unknown. Here, we report the cloning of a maize NLR gene, RppK, for resistance against southern corn rust (SCR) and its cognate Avr gene, AvrRppK, from Puccinia polysora (the causal pathogen of SCR). The AvrRppK gene has no sequence variation in all examined isolates. It has high expression level during infection and can suppress pattern-triggered immunity (PTI). Further, the introgression of RppK into maize inbred lines and hybrids enhances resistance against multiple isolates of P. polysora, thereby increasing yield in the presence of SCR. Together, we show that RppK is involved in resistance against multiple P. polysora isolates and it can recognize AvrRppK, which is broadly distributed and conserved in P. polysora isolates.

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