ZmAGO18b negatively regulates maize resistance against southern leaf blight

文献类型： 外文期刊

第一作者： Dai, Zhikang

作者： Dai, Zhikang;Yang, Qianhui;Chen, Donghai;Li, Bingchen;Que, Jiamin;Hu, Long;Zhang, Bao;Zhang, Zuxin;Lai, Zhibing;Zhang, Bao;Zhang, Zuxin;Lai, Zhibing;Chen, Kun;Zhang, Shukuan;Lai, Zhibing;Lai, Zhibing

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 0040-5752

年卷期： 2023 年 136 卷 7 期

页码：

收录情况： SCI

摘要： Key messageHere, we report that ZmAGO18b encoding an argonaute protein is a negative regulator of maize resistance against southern leaf blight.Southern leaf blight caused by fungal pathogen Cochliobolus heterostrophus is a destructive disease on maize throughout the world. Argonaute (AGO) proteins, key regulators in small RNA pathway, play important roles in plant defense. But whether they have function in maize resistance against C. heterostrophus is unknown. Association analysis between the nucleic variation of 18 ZmAGO loci with disease phenotype against C. heterostrophus was performed, and the ZmAGO18b locus was identified to be associated with resistance against C. heterostrophus. Overexpression of ZmAGO18b gene suppresses maize resistance against C. heterostrophus, and mutation of ZmAGO18b enhances maize resistance against C. heterostrophus. Further, we identified the resistant haplotype of ZmAGO18b by association analysis of natural variation in ZmAGO18b genomic DNA sequences with seedling resistance phenotypes against C. heterostrophus and confirmed the resistant haplotype is co-segregated with resistance phenotypes against C. heterostrophus in two F-2 populations. In sum, this study reports that ZmAGO18b negatively regulates maize resistance against C. heterostrophus.

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