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

Gengshen Chen, Bao Zhang, Junqiang Ding, Hongze Wang, Ce Deng, Jiali Wang, Qianhui Yang, Qianyu Pi, Ruyang Zhang, Haoyu Zhai, Junfei Dong, Junshi Huang, Jiabao Hou, Junhua Wu, Jiamin Que, Fan Zhang, Wenqiang Li, Haoxuan Min, Girma Tabor, Bailin Li, Xiangguo Liu, Jiuran Zhao, Jianbing Yan () and Zhibing Lai ()
Additional contact information
Gengshen Chen: Huazhong Agricultural University
Bao Zhang: Huazhong Agricultural University
Junqiang Ding: Henan Agricultural University
Hongze Wang: Huazhong Agricultural University
Ce Deng: Henan Agricultural University
Jiali Wang: Huazhong Agricultural University
Qianhui Yang: Huazhong Agricultural University
Qianyu Pi: Huazhong Agricultural University
Ruyang Zhang: Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences (BAAFS)
Haoyu Zhai: Huazhong Agricultural University
Junfei Dong: Huazhong Agricultural University
Junshi Huang: Huazhong Agricultural University
Jiabao Hou: Huazhong Agricultural University
Junhua Wu: Huazhong Agricultural University
Jiamin Que: Huazhong Agricultural University
Fan Zhang: Huazhong Agricultural University
Wenqiang Li: Huazhong Agricultural University
Haoxuan Min: Huazhong Agricultural University
Girma Tabor: Corteva Agriscience
Bailin Li: Corteva Agriscience
Xiangguo Liu: Institute of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences
Jiuran Zhao: Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences (BAAFS)
Jianbing Yan: Huazhong Agricultural University
Zhibing Lai: Huazhong Agricultural University

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract 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.

Date: 2022
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DOI: 10.1038/s41467-022-32026-4

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