数字农科院2.0

Identification of RppSLN from an Elite Landrace: A Major Locus Conferring Resistance to Southern Corn Rust in Maize (Zea mays L.)

文献类型： 外文期刊

作者： Yufei Wang;Shuai Ma;Dengfeng Zhang;Chunhui Li;Lin Chen;Bin Tang;Yixin An;Xuyang Liu;Guanhua He;Yunsu Shi;Yu Li;Tianyu Wang;Deguang Yang;Yongxiang Li

作者机构：

关键词： landrace;maize (Zea mays L.);RppSLN;southern corn rust

期刊名称： Plants

ISSN： 2223-7747

年卷期： 2024 年 13 卷 22 期

页码：

收录情况： SCIE（2024版）

摘要： Southern corn rust (SCR) is one of the most destructive foliar diseases in maize (Zea mays L.), resulting in significant yield losses. Therefore, the continuous identification of disease-resistant germplasm and the deployment of resistant hybrids is essential for durably controlling SCR. The objective of this research was to identify and characterize resistance loci against SCR in maize to expand disease management strategies. Here, we identified a maize landrace with high resistance to SCR ‘Silunuo’ (SLN) approaching complete immunity. We backcrossed it with a susceptible inbred line, N531, to generate a stable SCR-resistant introgression line N531_R. By crossing it with F35 (a susceptible inbred line), we created a large F2 segregating population and mapped a major SCR-resistant locus on chromosome 10, known as RppSLN. Based on the genome assembly and annotation, we found that RppSLN harbors two NBS-LRR (nucleotide binding site–leucine-rich repeat) genes, namely Zmays10G000430 and Zmays10G000440. These NBS-LRR genes were significantly induced during artificial inoculation with Puccinia polysora, suggesting that they might be candidate genes collectively contributing to the resistance level at this locus. In conclusion, this study identified a major SCR resistance locus directly isolated from a landrace, providing valuable support and information for expanding new disease-resistant germplasms and promoting the utilization of landraces.

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