Greenhouse Studies Reveal Increased Aggressiveness of Emergent Canadian Fusarium graminearum Chemotypes in Wheat
Greenhouse Studies Reveal Increased Aggressiveness of Emergent Canadian Fusarium graminearum Chemotypes in Wheat
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DOI：
10.1094/pdis-10-11-0863-re
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发表时间：
2012-09-01
期刊：
影响因子：
4.5
通讯作者：
Eudes, F.
中科院分区：
文献类型：
--
作者：
Foroud, N. A.;McCormick, S. P.;Eudes, F.
通过对一系列具有不同抗赤霉病水平的小麦品系进行点接种，评价了禾谷镰刀菌（Fusarium graminearum）赤霉病化学型在病害结果中的作用。比较了四种接种物，每种接种物由四种菌株的复合物组成，所述菌株具有来自“传统”或新兴群体的15-乙酰脱氧雪腐镰刀菌烯醇（ADON）化学型、3-ADON化学型或雪腐镰刀菌烯醇（NIV）化学型。评价的小麦包括具有不同水平的赤霉病抗性/敏感性的加拿大品系和从这些品系杂交开发的双单倍体品系。高抗性品系对所有评价的禾谷镰刀菌化学型的感染具有抗性。在中度易感/抗性小麦系中，3-ADON生产者和出现的15-ADON群体在某些情况下更具攻击性，并导致镰孢菌受损籽粒评分和单端孢霉烯积累水平更高。在这项研究中提出的数据表明，在当前气候的不断发展的F。禾谷镰刀菌种群，并建议中等水平的FHB抗性可能不足以最大限度地减少从F. graminearum谷物中的烯污染。被禾谷孢菌感染的小麦
The role of Fusarium graminearum trichothecene-chemotypes in disease outcomes was evaluated by point inoculation in a series of wheat lines with different levels of resistance to Fusarium head blight (FHB). Four inocula, each consisting of a composite of four strains with either 15-acetyldeoxynivalenol (ADON) chemotypes from "traditional" or emergent populations, a 3-ADON chemotype, or a nivalenol (NIV) chemotype, were compared. The evaluated wheat included Canadian lines with different levels of FHB resistance/susceptibility and double haploid lines developed from crosses of these lines. Highly resistant lines were resistant to infection by all of the E graminearum chemotypes evaluated. In the moderately susceptible/resistant wheat lines, the 3-ADON producers and the emergent 15-ADON population were, in some instances, more aggressive and resulted in higher Fusarium damaged kernel scores and levels of trichothecene accumulation. The data presented in this study demonstrate the importance of growing highly resistant wheat cultivars in the current climate of an evolving F. graminearum population, and suggest that moderate levels of FHB resistance may not be sufficient to minimize trichothecene contamination of grain from F. graminearum-infected wheat.