Abstract
Fusarium head blight (FHB) is one of the major damaging fungal diseases affecting wheat production globally. As a basis for progress in devising future management strategies for FHB in wheat, it is necessary to identify resistant wheat cultivars to disease infection and determine whether their stability varies over several experimental conditions. A pot experiment under open field Mediterranean conditions over two growing seasons 2017/18 and 2018/19 was conducted to evaluate components of quantitative resistance to a set of 16 fungal isolates of four FHB species. Disease-type I resistance, disease-type II resistance as well as disease-type III resistance were compared on two Syrian durum and bread wheat cultivars varying in their FHB resistance. Douma4 (bread), rather resistant in vitro and under controlled conditions, showed greater FHB disease-type I and II resistance than Cham7 (durum), which showed a susceptibility to disease. There were no significant differences in the resistance of two wheat cultivars as measured by disease-type III. As expected, these results confirmed previous in vitro and growth chamber findings, indicating that the assessment of resistance level is repeatable and stable under several experimental conditions. Overall, the two tested wheat cultivars were shown to exhibit acceptable resistance levels to FHB infection. Differences in aggressiveness among fungal isolates and susceptibility/resistance among wheat cultivars were found, emphasizing that screening for wheat resistance to FHB requires the use of aggressive fungal isolates or a mixture of several isolates. While in the Mediterranean countries the risk of disease is progressively increasing, the preliminary data in this report show that Syrian commercial cultivars could be new resistant donors with favorable agronomical characteristics in FHB-wheat breeding programs.
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Claims 7
Claim · model-written summary
Douma4 had greater type I and II FHB resistance than Cham7.
- Taxon
- wheat
Triticum aestivumt0 - Material
- Douma4e0
- Outcome
- FHB disease-type I and II resistancee0
- Direction
- greatere0
- Comparator
- Cham7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Douma4 (bread), rather resistant in vitro and under controlled conditions, showed greater FHB disease-type I and II resistance than Cham7 (durum)”
t0“wheat plants”
Claim · model-written summary
The two wheat cultivars did not differ significantly in type III resistance.
- Taxon
- wheatTriticum aestivume0
- Outcome
- resistance of two wheat cultivars as measured by disease-type IIIe0
- Direction
- no significant differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant differences in the resistance of two wheat cultivars as measured by disease-type III”
Claim · model-written summary
Resistance assessment was repeatable and stable across experimental conditions.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- assessment of resistance level is repeatable and stablee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the assessment of resistance level is repeatable and stable under several experimental conditions”
t0“wheat plants”
Claim · model-written summary
Both tested wheat cultivars showed acceptable resistance to FHB.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- acceptable resistance levels to FHB infectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the two tested wheat cultivars were shown to exhibit acceptable resistance levels to FHB infection”
t0“wheat plants”
Claim · model-written summary
Fungal isolates differed in aggressiveness and wheat cultivars differed in susceptibility or resistance.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Differences in aggressiveness among fungal isolates and susceptibility/resistance among wheat cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in aggressiveness among fungal isolates and susceptibility/resistance among wheat cultivars were found”
Claim · model-written summary
Screening wheat for FHB resistance requires aggressive isolates or a mixture of isolates.
- Taxon
- wheatTriticum aestivume0
- Outcome
- use of aggressive fungal isolates or a mixture of several isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“screening for wheat resistance to FHB requires the use of aggressive fungal isolates or a mixture of several isolates”
Claim · model-written summary
Syrian commercial wheat cultivars could serve as resistant donors in FHB breeding.
- Taxon
- wheatTriticum aestivume0
- Outcome
- new resistant donors with favorable agronomical characteristicse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Syrian commercial cultivars could be new resistant donors with favorable agronomical characteristics in FHB-wheat breeding programs”