Geographic Distribution of Trichothecene Chemotypes of the Fusarium graminearum Species Complex in Major Winter Wheat Production Areas of China
文献类型: 外文期刊
作者: Shen, Cheng-mei 1 ; Hu, Ying-chun 1 ; Sun, Hai-yan 1 ; Li, Wei 1 ; Guo, Jian-hua 2 ; Chen, Huai-gu 1 ;
作者机构: 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China
2.Nanjing Agr Univ, Coll Plant Protect, Nanjing 210095, Jiangsu, Peoples R China
期刊名称:PLANT DISEASE ( 2020影响因子:4.438; 五年影响因子:4.7 )
收录情况: SCI
摘要: Shen, C.-M., Hu, Y.-C., Sun, H.-Y., Li, W., Guo, J.-H., and Chen, H.-G. 2012. Geographic distribution of trichothecene chemotypes of the Fusarium graminearum species complex in major winter wheat production areas of China. Plant Dis. 96:1172-1178. Fusarium head blight, caused by members of the Fusarium graminearum species complex (FGSC), is among the most destructive and economically important diseases of small grain crops, including wheat. To determine the phylogenetic species and mycotoxin (trichothecene) chemotypes of the FGSC in the major winter-wheat-producing areas of China, 530 isolates were collected from diseased wheat during the years 2008, 2009, and 2010, and typed using a polymerase chain reaction-based trichothecene genotype assay. Virulence of isolates with different chemotypes was also compared. Of the 530 isolates typed, 348 were F. asiaticum and 182 were F graminearum. Subdividing the 530 isolates by the trichothecene predicted to be expressed, 482 were of the deoxynivalenol (DON) chemotype and 48 were nivalenol (NIV). Acetylated derivatives of DON included 3-acetyldeoxynivalenol (3-AcDON; 300 isolates), and 15-acetyldeoxynivalenol (15-AcDON; 182 isolates). Chemotypes of the E asiaticum isolates were either 3-AcDON or NIV, with 3-AcDON being predominant. F graminearum isolates were all of the 15-AcDON chemotype. F asiaticum was the predominant phylogenetic species in the Yangtze River Basin and E graminearum was dominant in the north of China. Two areas of co-occurrence of trichothecene chemotypes were found. The 3-AcDON and 15-AcDON isolates had similar levels of virulence. The DON isolates were significantly more virulent than those of the NIV. The 3-AcDON and 15-AcDON chemotypes were predominant in the Yangtze River Basin and areas north of the Yangtze River Basin, respectively, and it is suggested that geographic distribution is associated with differences in temperature as well as crop rotation systems.
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