文献类型： 外文期刊
第一作者： Qin, P. W.
作者： Qin, P. W.;Xu, J.;Jiang, Y.;Hu, L.;Xu, X. D.;van der Lee, T.;Waalwijk, C.;Zhang, W. M.
作者机构：
关键词： maize ear rot; Fusarium spp.; population structure; mycotoxin chemotype
期刊名称：WORLD MYCOTOXIN JOURNAL （ 影响因子：3.353； 五年影响因子：3.108 ）
ISSN： 1875-0710
年卷期： 2020 年 13 卷 2 期
页码：
收录情况： SCI
摘要： Maize is currently the most important crop in China. A major concern in maize production is maize ear rot caused by Fusarium spp., which results in yield losses, reduction of seed quality and the accumulation of mycotoxins in the harvested grains. To identify the importance of the different Fusarium species in maize infection, we performed a comprehensive survey on 9,000 asymptomatic and randomly collected maize kernels. Seeds were collected from 12 different provinces covering all major maize growing areas in China and included five maize varieties. In total 1,022 Fusarium isolates were retrieved that were identified based on morphological characteristics, by species specific diagnostic PCRs and by EF1-alpha gene sequencing. Eight different species were identified: Fusarium verticillioides (75.34%), Fusarium graminearum (8.32%), Fusarium proliferatum (7.14%), Fusarium subglutinans (4.11%), Fusarium meridionale (1.57%), Fusarium oxysporum (1.37%), Fusarium semitectum (1.17%), and Fusarium asiaticum (0.98%). The distribution of Fusarium species was found to be different in different regions with the largest diversity observed in Hubei province, where all eight Fusarium species were isolated. Genetic chemotyping within the F. graminearum species complex indicated that all of the 85 F. graminearum isolates showed the 15-acetyldeoxynivalenol chemotype, whereas all F. asiaticum (n=10) and F. meridionale (n=16) isolates had the nivalenol chemotype even when isolated from the same maize field. To our knowledge this is the largest collection of Fusarium isolates from maize and further exploitations of this collection are discussed.
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