Aggressiveness of <i>Fusarium culmorum</i> isolates for head blight symptoms is highly stable across four cereal crops

Miedaner, Thomas; Lieberherr, Bärbel; Gaikpa, David Sewordor

doi:10.1111/jph.12995

Cited by 5 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that isolate × host genotype interactions have been observed for some Fusarium species and cereal species combinations, but the impact of the interactions were limited compared to the main effects (György et al, 2020;Stenglein et al, 2014). Accordingly, Miedaner et al (2021) observed no isolate × host genotype interactions for different F. culmorum isolates inoculated on several cereal species. Our study included one variety only.…”

Section: Resistance To F Langsethiae and Ht2 + T2mentioning

confidence: 80%

“…Aggressiveness and toxin producing ability of F. langsethiae isolates We observed significant differences between isolates in the level of F. langsethiae DNA in harvested grain after inoculation, suggesting variation in aggressiveness in the Norwegian F. langsethiae population. Differences in aggressiveness have been observed within different Fusarium species, such as F. culmorum, F. poae, and F. graminearum (Aamot et al, 2015;Miedaner et al, 2021;Stenglein et al, 2014). For F. langsethiae, variations in aggressiveness have been observed among UK isolates in detached leaf assays, and the aggressiveness was independent of the host from which the isolates originated (Imathiu et al, 2009;Opoku et al, 2011).…”

Section: Resistance To F Langsethiae and Ht2 + T2mentioning

confidence: 99%

See 1 more Smart Citation

Fusarium langsethiae and mycotoxin contamination in oat grain differed with growth stage at inoculation

et al. 2022

View full text Add to dashboard Cite

High levels of mycotoxins are occasionally observed in Norwegian oat grain lots. Mycotoxins of primary concern in Norwegian oats are deoxynivalenol (DON) produced by Fusarium graminearum and HT2- and T2-toxins (HT2 + T2) produced by Fusarium langsethiae. Improved understanding of the epidemiology of Fusarium spp. is important for the development of measures to control mycotoxins. We studied the susceptibility to F. langsethiae after inoculation at early (booting, heading, flowering) or late (flowering, milk, dough) growth stages in three oat varieties in greenhouse experiments. The varieties had previously shown different levels of resistance to F. graminearum: Odal, Vinger (both moderately resistant), and Belinda (susceptible). The level of F. langsethiae DNA and HT2 + T2 were measured in harvested grain. In addition, we observed differences in aggressiveness (measured as the level of F. langsethiae DNA in grain) between F. langsethiae isolates after inoculation of oats at flowering. Substantial levels of F. langsethiae DNA (mean ≥ 138 pg per μg plant DNA) and HT2 + T2 (≥348 μg/kg) were detected in grain harvested from oats that were spray-inoculated at heading or later stages, but not at booting (mean ≤ 10 pg/μg and ≤ 25 μg/kg, respectively), suggesting that oats are susceptible to F. langsethiae from heading and onwards. Vinger was the most resistant variety to F. langsethiae/HT2 + T2, whereas Odal and Belinda were relatively susceptible. We observed that late inoculations yielded high levels of other trichothecene A metabolites (mean sum of metabolites of 35–1048 μg/kg) in addition to HT2 + T2, in harvested grain, an indication that infections close to harvest may pose a further risk to food and feed safety.

show abstract

Section: Resistance To F Langsethiae and Ht2 + T2mentioning

confidence: 80%

Section: Resistance To F Langsethiae and Ht2 + T2mentioning

confidence: 99%

Fusarium langsethiae and mycotoxin contamination in oat grain differed with growth stage at inoculation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The study at hand extended thus this concept of a negligible genotype‐by‐species interaction for FHB resistance in wheat to the resistance against the accumulation of the associated mycotoxins. This suggested that wheat breeders need to test their germplasm only for resistance against one Fusarium species, while genotype‐by‐isolate interactions are usually also of negligible magnitude (Miedaner et al, 2021; Serajazari et al, 2019). However, an indirect selection for the mycotoxin content was estimated to be less efficient when using trials inoculated with F. sporotrichioides in comparison to F. graminearum and F. culmorum , since their plot‐based heritability or repeatability was much lower due to a lower aggressiveness of the F. sporotrichioides isolate, leading to lower genetic variation for FHB symptom severity and rendering the precise differentiation between genotypes a more difficult task.…”

Section: Discussionmentioning

confidence: 99%

Efficiency of indirect selection for fusarium head blight resistance and mycotoxin accumulation in winter wheat (Triticum aestivum L.)

2023

View full text Add to dashboard Cite

Fusarium head blight (FHB) is one of the most devastating diseases of wheat and can lead to significant yield losses as well as a contamination of the crop with mycotoxins that are a major concern in cereal‐based food and feed products. The aims of this study were thus to investigate the relationship between resistance against multiple Fusarium species and to assess the potential of an indirect phenotypic and genomic selection for the resistance against the accumulation of several mycotoxins in wheat. Strong phenotypic and genetic correlations between the mycotoxin contents, FHB severity and FHB‐associated traits were observed, irrespective of if traits were assessed in trials inoculated with a DON or HT‐2/T‐2 producing Fusarium species. A multi‐stage phenotypic or genomic selection with low anther retention being used for an indirect selection among early generation selection candidates, followed by an evaluation of the pre‐selected set in disease nurseries, and lastly by assessing the mycotoxin content of the most promising genotypes is suggested as a suitable strategy to breed for wheat cultivars with reduced risk of mycotoxin accumulation.

show abstract

“…For research purposes, the existing literature applies highly specialized methodologies with enzymes causing resistance in different genotypes. The stability of aggressiveness lasts for a shorter time, being mostly stable for several years [ 143 ] but potentially changing after a longer period. The F. culmorum isolate No.…”

Section: Phenotyping How To Evaluate Resistancementioning

confidence: 99%

“…This is closer to the natural condition, where every infection site is the result of the infection of a single conidium of millions in a field. When the specialized races are absent, the aggressiveness differences between isolates influence resistance differentiation; at higher aggressiveness, the differentiation is much better [ 12 , 95 , 143 ]. For this reason, with four isolates or inocula with differing levels of aggressiveness from medium to high, there is a higher probability of gaining a more reliable result.…”

Section: Phenotyping How To Evaluate Resistancementioning

confidence: 99%

What Is Fusarium Head Blight (FHB) Resistance and What Are Its Food Safety Risks in Wheat? Problems and Solutions—A Review

Mesterhazy

2024

Toxins

View full text Add to dashboard Cite

The term “Fusarium Head Blight” (FHB) resistance supposedly covers common resistances to different Fusarium spp. without any generally accepted evidence. For food safety, all should be considered with their toxins, except for deoxynivalenol (DON). Disease index (DI), scabby kernels (FDK), and DON steadily result from FHB, and even the genetic regulation of Fusarium spp. may differ; therefore, multitoxin contamination is common. The resistance types of FHB form a rather complex syndrome that has been the subject of debate for decades. It seems that resistance types are not independent variables but rather a series of components that follow disease and epidemic development; their genetic regulation may differ. Spraying inoculation (Type 1 resistance) includes the phase where spores land on palea and lemma and spread to the ovarium and also includes the spread-inhibiting resistance factor; therefore, it provides the overall resistance that is needed. A significant part of Type 1-resistant QTLs could, therefore, be Type 2, requiring the retesting of the QTLs; this is, at least, the case for the most effective ones. The updated resistance components are as follows: Component 1 is overall resistance, as discussed above; Component 2 includes spreading from the ovarium through the head, which is a part of Component 1; Component 3 includes factors from grain development to ripening (FDK); Component 4 includes factors influencing DON contamination, decrease, overproduction, and relative toxin resistance; and for Component 5, the tolerance has a low significance without new results. Independent QTLs with different functions can be identified for one or more traits. Resistance to different Fusarium spp. seems to be connected; it is species non-specific, but further research is necessary. Their toxin relations are unknown. DI, FDK, and DON should be checked as they serve as the basic data for the risk analysis of cultivars. A better understanding of the multitoxin risk is needed regarding resistance to the main Fusarium spp.; therefore, an updated testing methodology is suggested. This will provide more precise data for research, genetics, and variety registration. In winter and spring wheat, the existing resistance level is very high, close to Sumai 3, and provides much greater food safety combined with sophisticated fungicide preventive control and other practices in commercial production.

show abstract

Aggressiveness of Fusarium culmorum isolates for head blight symptoms is highly stable across four cereal crops

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 5 publications

References 19 publications

Fusarium langsethiae and mycotoxin contamination in oat grain differed with growth stage at inoculation

Fusarium langsethiae and mycotoxin contamination in oat grain differed with growth stage at inoculation

Efficiency of indirect selection for fusarium head blight resistance and mycotoxin accumulation in winter wheat (Triticum aestivum L.)

What Is Fusarium Head Blight (FHB) Resistance and What Are Its Food Safety Risks in Wheat? Problems and Solutions—A Review

Contact Info

Product

Resources

About