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SNP-based bulk segregant analysis revealed disease resistance QTLs associated with northern corn leaf blight in maize

文献类型： 外文期刊

作者： Zhai, Ruining 1 ; Huang, Aihua 1 ; Mo, Runxiu 1 ; Zou, Chenglin 1 ; Wei, Xinxing 1 ; Yang, Meng 1 ; Tan, Hua 1 ; Huang, Kaijian 1 ; Qin, Jie 2 ;

作者机构： 1.Guangxi Acad Agr Sci, Maize Res Inst, Nanning, Guangxi, Peoples R China

2.Guangxi Acad Agr Sci, Nanning, Guangxi, Peoples R China

关键词： northern corn leaf blight; disease resistance; bulk segregant analysis; SNP; QTL

期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.772； 五年影响因子：4.933 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Maize (Zea mays L.) is the most important food security crop worldwide. Northern corn leaf blight (NCLB), caused by Exserohilum turcicum, severely reduces production causing millions of dollars in losses worldwide. Therefore, this study aimed to identify significant QTLs associated with NCLB by utilizing next-generation sequencing-based bulked-segregant analysis (BSA). Parental lines GML71 (resistant) and Gui A10341 (susceptible) were used to develop segregating population F-2. Two bulks with 30 plants each were further selected from the segregating population for sequencing along with the parental lines. High throughput sequencing data was used for BSA. We identified 10 QTLs on Chr 1, Chr 2, Chr 3, and Chr 5 with 265 non-synonymous SNPs. Moreover, based on annotation information, we identified 27 candidate genes in the QTL regions. The candidate genes associated with disease resistance include AATP1, At4g24790, STICHEL-like 2, BI O 3-BIO1, ZAR1, SECA2, ABCG25, LECRK54, MKK7, MKK9, RLK902, and DEAD-box ATP-dependent RNA helicase. The annotation information suggested their involvement in disease resistance-related pathways, including protein phosphorylation, cytoplasmic vesicle, protein serine/threonine kinase activity, and ATP binding pathways. Our study provides a substantial addition to the available information regarding QTLs associated with NCLB, and further functional verification of identified candidate genes can broaden the scope of understanding the NCLB resistance mechanism in maize.

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