文献类型： 外文期刊
作者： Hou, Mengwei 1 ; Cao, Yanyong 1 ; Zhang, Xingrui 2 ; Zhang, Shulin 3 ; Jia, Tengjiao 1 ; Yang, Jiwei 1 ; Han, Shengbo 1 ; Wang, Lifeng 1 ; Li, Jingjing 1 ; Wang, Hao 1 ; Zhang, Lili 1 ; Wu, Xiaolin 4 ; Duan, Canxing 2 ; Li, Huiyong 1 ;
作者机构： 1.Henan Acad Agr Sci, Inst Cereal Crops, Zhengzhou, Peoples R China
2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China
3.Anyang Inst Technol, Coll Biol & Food Engn, Anyang, Peoples R China
4.Henan Agr Univ, Coll Life Sci, Zhengzhou, Peoples R China
关键词： maize stalk rot; Pythium aristosporum; genome-wide association study; resistance gene; leucine-rich repeat receptor-like kinase; virus-induced gene silencing
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）
ISSN： 1664-462X
年卷期： 2023 年 14 卷
页码：
收录情况： SCI
摘要： Stalk rot, a severe and widespread soil-borne disease in maize, globally reduces yield and quality. Recent documentation reveals that Pythium aristosporum has emerged as one of the dominant causal agents of maize stalk rot. However, a previous study of maize stalk rot disease resistance mechanisms and breeding had mainly focused on other pathogens, neglecting P. aristosporum. To mitigate crop loss, resistance breeding is the most economical and effective strategy against this disease. This study involved characterizing resistance in 295 inbred lines using the drilling inoculation method and genotyping them via sequencing. By combining with population structure, disease resistance phenotype, and genome-wide association study (GWAS), we identified 39 significant single-nucleotide polymorphisms (SNPs) associated with P. aristosporum stalk rot resistance by utilizing six statistical methods. Bioinformatics analysis of these SNPs revealed 69 potential resistance genes, among which Zm00001d051313 was finally evaluated for its roles in host defense response to P. aristosporum infection. Through virus-induced gene silencing (VIGS) verification and physiological index determination, we found that transient silencing of Zm00001d051313 promoted P. aristosporum infection, indicating a positive regulatory role of this gene in maize's antifungal defense mechanism. Therefore, these findings will help advance our current understanding of the underlying mechanisms of maize defense to Pythium stalk rot.
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