Analysis of Fusarium graminearum Species Complex from Wheat Maize Rotation Regions in Henan (China)
文献类型： 外文期刊
作者： Hao, Jun Jie 1 ; Xie, Shu Na 1 ; Sun, Jing 1 ; Yang, Gong Qiang 1 ; Liu, Jia Zhong 1 ; Xu, Fei 1 ; Ru, Yan Yan 2 ; Song, 1 ;
作者机构： 1.Henan Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Management Crops Southern, Henan Key Lab Crop Pest Control, Zhengzhou 450002, Peoples R China
2.Henan Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Manage
期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）
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收录情况： SCI
摘要： Fusarium head blight (FHB) and maize stalk rot (MSR), caused by members of the Fusarium graminearum species complex (FGSC), are among the most destructive and economically important diseases in the world. Species identity and the trichothecene chemotype of 312 members of the FGSC from diseased wheat spikes and maize stalks in Henan was determined using phylogenetic analyses and a polymerase chain reaction trichothecene chemotype assay. F. graminearum sensu stricto accounted for more than 93% of the FGSC isolates associated with FHB (N = 168) and MSR (N = 130). The remaining isolates were F. asiaticum. Significant differences were found in the frequencies of the two species within the hosts (P < 0.01). However, the frequencies of the same species in FHB and MSR were similar (P > 0.05) for wheat and maize isolates, indicating that the composition of the FGSC with respect to wheat and maize in these fields varied little. The 15-acetyl-deoxynivalenol (15-ADON) trichothecene chemotype represented 92.7 and 98.5% of isolates from wheat (N = 167) and maize (N = 130), respectively. However, the 3-acetyl-deoxynivalenol chemotype was found in 6.7% of wheat isolates, and the nivalenol chemotype in 1.5% of MSR isolates and in 0.6% of FHB isolates. Mycelial growth at different concentrations of carbendazim and difenoconazole did not differ between F. graminearum sensu stricto and F. asiaticum. These results suggest that the 15-ADON chemotype of F. graminearum sensu stricto is the predominant pathogen that causes wheat- and maize-related diseases in this region.
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