Genetic diversity and aggressiveness of Fusarium species isolated from soybean in Alberta, Canada

文献类型： 外文期刊

第一作者： Zhou, Qixing

作者： Zhou, Qixing;Chang, Kan-Fa;Hwang, Sheau-Fang;Fu, Heting;Turnbull, George D.;Li, Nana;Strelkov, Stephen E.;Conner, Robert L.;McLaren, Debra L.;Harding, Michael W.

作者机构：

关键词： Fusarium root rot;ITS;EF-1 alpha;Aggressiveness;Soybean

期刊名称：CROP PROTECTION （ 影响因子：2.571； 五年影响因子：3.11 ）

ISSN： 0261-2194

年卷期： 2018 年 105 卷

页码：

收录情况： SCI

摘要： Soybean (Glycine max (L.) Merr.) has excellent potential as an alternative crop to canola in southern Alberta farming systems. However, soybean is susceptible to Fusarium root rot, which usually results in the occurrence of dead or dying plants in mid-to-late summer and severe reductions in yield. A total of 102 isolates identified as Fusarium were recovered from diseased soybean root samples collected from central and southern Alberta from 2011 to 2013. Ten species of Fusarium were identified, with F. acuminatum as the predominant species (31 out of 102 isolates, 30.39%), followed by F. equiseti (16.67%), F. culmorum (13.73%), F. avenaceum (10.78%), F. oxysporum (8.82%), F. redolens (7.84%), F. torulosum (4.90%), F. tricinctum (2.94%), F. commune (1.96%) and F. proliferatum (0.98%). This is the first report of F. commune, F. redolens and F. torulosum causing root rot in soybean in Canada. Phylogenetic analyses based on sequence data from the translation elongation factor 1-a (EFla) and the internal transcribed spacer (ITS) region were used to evaluate genetic variation and, in conjunction with morphological characters, for species identification. All of the Fusarium isolates were able to infect soybean, although some exhibited varying levels of aggressiveness.

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