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Genetic detection and identification of the candidate resistance gene for a major QTL resistant to Puccinia polysora in maize

文献类型： 外文期刊

作者： Tian, Zhiqiang 1 ; Du, Wenjie 1 ; Li, Zheng 1 ; Deng, Ce 1 ; Lv, Meng 1 ; Li, Xueying 1 ; Zhao, Xiaodi 1 ; Hao, Junjie 2 ; Han, Liping 1 ; Li, Zhimin 1 ; Ding, Junqiang 1 ;

作者机构： 1.Henan Agr Univ, Coll Agron, Zhengzhou 450046, Peoples R China

2.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou 450002, Peoples R China

关键词： Maize; Southern corn rust; Major QTL; Fine mapping; Candidate gene

期刊名称：PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY （ 影响因子：2.741； 五年影响因子：2.576 ）

ISSN： 0885-5765

年卷期： 2022 年 121 卷

页码：

收录情况： SCI

摘要： Southern corn rust (SCR) is a major foliar disease in maize. Identification the major QTL and candidate resistance gene is prerequisite in maize resistance breeding programs. To identify major resistance loci/gene(s) resistant to SCR, a recombinant inbred line (RIL) population derived from a cross between 975 and 12 (resistant) and Lx9801 (susceptible) was analyzed. In total four QTLs were identified, which were located on chromosomes 5, 9 and 10, respectively. Among them, a major QTL on chromosome 10 (qSCR3), were detected in all the environments, which can explain 70.3-78.4% of the total phenotypic variation. Fine-mapping of qSCR3 delimited the QTL to an interval of -225 Kb. Using transcripts assembly of the 975-12 and a susceptible mutant (975-12S), an NLR gene, Zm00025ab420970, was identified as the candidate gene for qSCR3, which is a new allele/gene resistant to SCR in maize. Since qSCR3 is a major QTL resistant to SCR, it can be used as a desirable resistance source in maize resistance breeding programs.

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