Response of Barley Genotypes to Fusarium Head Blight under Natural Infection and Artificial Inoculation Conditions

文献类型： 外文期刊

第一作者： Khanal, Raja

作者： Khanal, Raja;Choo, Thin Meiw;Xue, Allen G.;Vigier, Bernard;Savard, Marc E.;Blackwell, Barbara;Wang, Junmei;Yang, Jianming;Martin, Richard A.

作者机构：

关键词： barley; deoxynivalenol; Fusarium graminearum; Fusarium head blight; Hordeum vulgare L.

期刊名称：PLANT PATHOLOGY JOURNAL （ 影响因子：1.795； 五年影响因子：2.314 ）

ISSN： 1598-2254

年卷期： 2021 年 37 卷 5 期

页码：

收录情况： SCI

摘要： Forty-eight spring barley genotypes were evaluated for deoxynivalenol (DON) concentration under natural infection across 5 years at Harrington, Prince Edward Island. These genotypes were also evaluated for Fusari-um head blight (FHB) severity and DON concentration under field nurseries with artificial inoculation of Fu-sarium graminearum by the grain spawn method across 2 years at Ottawa, Ontario, and one year at Hangzhou, China. Additionally, these genotypes were also evaluat-ed for FHB severity under greenhouse conditions with artificial inoculation of F. graminearum by conidial suspension spray method across 3 years at Ottawa, On-tario. The objective of the study was to investigate if re-actions of barley genotypes to artificial FHB inoculation correlate with reactions to natural FHB infection. DON concentration under natural infection was positively correlated with DON concentration (r = 0.47, P < 0.01) and FHB incidence (r = 0.56, P < 0.01) in the artificially inoculated nursery with grain spawn method. There-fore, the grain spawn method can be used to effectively screen for low DON. FHB severity, generated from greenhouse spray, however, was not correlated with DON concentration (r = 0.12, P > 0.05) under natural infection and it was not correlated with DON concen-tration (r = -0.23, P > 0.05) and FHB incidence (r = 0.19, P > 0.05) in the artificially inoculated nursery with grain spawn method. FHB severity, DON concentra-tion, and yield were affected by year, genotype, and the genotype x year interaction. The effectiveness of green -house spray inoculation for indirect selection for low DON concentration requires further studies. Nine of the 48 genotypes were found to contain low DON under natural infection. Island barley had low DON and also had high yield.

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