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Development of an Inoculation Technique for Rapidly Evaluating Maize Inbred Lines for Resistance to stalk rot Caused by Fusarium spp. in the Field

Development of an Inoculation Technique for Rapidly Evaluati...

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中国植物病理学会2024年学术年会

作者：何影李永刚 College of Plant Protection Northeast Agricultural University

Maize(Zea mays L.) stalk rot,primarily caused by the soilborne fungal pathogen Fusarium spp.,is a major crop disease worldwide that adversely affects maize quality and *** study was initiated with the aim to develop and utilize a rapid continuous injection inoculation technique for evaluating maize inbred lines for resistance to Fusarium *** field conditions,which could help in the identification and development of new sources of and strategies for host resistance to manage the *** injection inoculation is a rapid,stable,and simple method that can evaluate the resistance of maize inbred lines to Fusarium stalk rot(FSR) within 20 days,which is a significant improvement over the traditional methods that require a longer *** verify the feasibility and reliability of the inoculation method,Fusarium graminearum,***,and *** were isolated,identified,and inoculated into maize at the six-leaf stage(V6) by a veterinary adjustable bottle continuous vaccination *** results showed that,of a total of 97 inbred maize lines,6(6.2%)showed high resistance to maize stalk rot,20 showed resistance(20.6%),32 were susceptible(33.0%),and 39 were very susceptible(40.2%).Based on simple sequence repeat markers,an analysis of molecular variance indicated a significant correlation between population of the inbred maize line and resistance to FSR(P=0.001),which suggests that the resistance to FSR is a heritable ***,this study provided a systematic,rapid,stable,and simple identification method for maize inbred lines resistant to FSR in the field,which could be used to select resistant lines for breeding programs and to develop strategies for managing the *** the same time,this method is also suitable for geneticdiversity analysis of maize inbred lines resistant to FSR,which can help in understanding the genetic basis of resistance to the disease.

关键词： continuous injection method Fusarium spp. maize inbred lines resistance stalk rot

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Resistance Analysis of 25 Corn Varieties to stalk rot and Evaluation of Yield Loss

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Plant Diseases and Pests 2016年第5期7卷 16-20页

作者： Wang Liangfa Wang Yaochuang Zhang Sujuan Zhu Zikuan Zhang Huiyu Zhang Shoulin Corn Research Center Hebi Academy of Agricultural Sciences

Due to the meteorological factors, Henan Province had a large-scale outbreak of corn stalk rot in 2014, and the incidence status of 25 varieties was investigated. According to the relevant resistance identification standards, Xundan.509 was classified as resistance variety; Yudan606, Jinsai38 and Xundan3136 were classified as moderate resistance ones, while the other 21 varieties were highly susceptible varieties. Using the yield loss rate of 5% as the critical value of disease tolerance standard, XundanS09, Yudan606, Jinsai38, Xundan3136, Huaiyu5288, QiaoyuS, XY046, Zhengyu10, Lile66, WeikeT02 and Xundan29 were classified into tolerance varieties of corn stalk rot. The concept between disease resistance and disease tolerance was distinguished. The diseased plant rate was used as the classification basis of disease resistance and the yield loss rate was used as the evaluation standard of disease tolerance. The relationship between both was showed by a Venn diagram.

关键词： Corn stalk rot Yield loss rate Disease resistance Disease tolerance

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Natural variation in maize gene ZmSBR1 confers seedling resistance to Fusarium verticillioides

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The Crop Journal 2024年第3期12卷 836-844页

作者： Yunxia Song Peipei Ma Jingyang Gao Chaopei Dong Zhao Wang Yifan Luan Jiafa Chen Doudou Sun Pei Jing Xuecai Zhang Weibin Song Zijian Zhou Jianyu Wu College of Agronomy Henan Agricultural UniversityZhengzhou 450002HenanChina College of Life Sciences Henan Agricultural UniversityZhengzhou 450002HenanChina Global Maize Program International Maize and Wheat Improvement Center(CIMMYT)Apdo 6-64106600 MexicoDFMexico National Maize Improvement Center Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing 100193China

Maize seedling blight caused by Fusarium verticillioides is a widely occurring maize disease,but the genetics and mechanisms of resistance are not well *** this study,GWAS performed by MLM and 3VmrMLM identified 40 and 20 QTNs,associated with seedling blight *** methods identified 49 and 36 genes,*** verification of candidate gene ZmSBR1 identified by both methods showed that the resistance of a mutant line to seedling blight decreased by 0.37 grade points after inoculation with ***,compared with the *** length of the stem rot lesion caused by *** increased by 86%in mutant seedlings,and the relative length of the adult plant stalk rot increased by 35%in mutant plants compared to the wild type after inoculation with Fusarium *** analysis showed that expression of defense-related genes after inoculation was down-regulated in the mutant compared to the wild type,synthesis of secondary metabolites associated with resistance was reduced,and the immune response triggered by PAMP decreased,resulting in decreased resistance of mutant maize *** gene association analysis showed that most maize inbred lines carried the susceptible haplotype.A functional PCR marker was *** results demonstrated that ZmSBR1 conferred resistance to multiple Fusarium diseases at the seedling and adult growth stages and had important application value in breeding.

关键词： Seedling blight stalk rot Multiple disease resistance

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