Abstract
ABSTRACT Fusarium head blight (FHB), primarily caused by Fusarium graminearum , poses a major threat to wheat and barley production. Although Fusarium poae is increasingly reported in cereal‐growing regions worldwide, its pathogenic potential in US wheat and barley remains underexplored. We compared the pathogenicity and aggressiveness of four F. poae isolates (GA18W 2.1.6, GA18W 5.2.4, GA18W 6.1.4 and GA19W 13.2.1II) and one reference F. graminearum isolate (GA18W 3.1.4) across seven cultivars (i.e., three soft red winter wheat, two durum wheat and two barley) classified as moderately resistant or susceptible. Greenhouse evaluations were conducted in 2021, 2022 and 2024 using single floret inoculation (SFI) and direct spray (DS). Disease severity (SEV), Fusarium ‐damaged kernels (FDK) and thousand‐kernel weight (TKW) were assessed. Main effects of the isolate, cultivar and inoculation method were significant for SEV, FDK and TKW ( p < 0.0001). As no consistent isolate‐level differences were detected among the four F. poae isolates, data were pooled for species‐level analysis. Across cultivars, inoculation methods and years, F. graminearum GA18W 3.1.4 produced higher SEV (47%–63%) and FDK (54%–76%) and reduced TKW (to 18 g) relative to pooled F. poae (SEV 14%–36%; FDK 32%–56%; TKW up to 24 g), with the greatest impacts in durum wheat. These results demonstrate that F. poae can contribute to FHB in US small‐grain cereals and support consideration of this species in resistance screening programmes.
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Claims 7
Claim · model-written summary
F. graminearum GA18W 3.1.4 produced higher disease severity than pooled F. poae on wheat and barley.
- Taxon
- wheat and barley
.jpg?width=60)
Hordeum vulgare
Triticum aestivume2 - Treatment
- F. graminearum GA18W 3.1.4e1
- Interactor
- F. graminearum GA18W 3.1.4
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=60)
Fusarium graminearume1pathogen - Second interactor
- F. poae
Fusarium poaee1pathogen - Outcome
- SEVe1
- Direction
- highere1
- Value
- 47%–63%e1
- Comparator
- pooled F. poaee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=500)
Verbatim
e1“F. graminearum GA18W 3.1.4 produced higher SEV (47%–63%) and FDK (54%–76%) and reduced TKW (to 18 g) relative to pooled F. poae (SEV 14%–36%; FDK 32%–56%; TKW up to 24 g)”
e2“poses a major threat to wheat and barley production”
Claim · model-written summary
F. graminearum GA18W 3.1.4 produced higher Fusarium-damaged kernels than pooled F. poae on wheat and barley.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Treatment
- F. graminearum GA18W 3.1.4e1
- Interactor
- F. graminearum GA18W 3.1.4Fusarium graminearume1pathogen
- Second interactor
- F. poaeFusarium poaee1pathogen
- Outcome
- FDKe1
- Direction
- highere1
- Value
- 54%–76%e1
- Comparator
- pooled F. poaee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“F. graminearum GA18W 3.1.4 produced higher SEV (47%–63%) and FDK (54%–76%) and reduced TKW (to 18 g) relative to pooled F. poae (SEV 14%–36%; FDK 32%–56%; TKW up to 24 g)”
e2“poses a major threat to wheat and barley production”
Claim · model-written summary
F. graminearum GA18W 3.1.4 reduced thousand-kernel weight to 18 g, compared with pooled F. poae on wheat and barley.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Treatment
- F. graminearum GA18W 3.1.4e1
- Interactor
- F. graminearum GA18W 3.1.4Fusarium graminearume1pathogen
- Second interactor
- F. poaeFusarium poaee1pathogen
- Outcome
- TKWe1
- Direction
- reducede1
- Value
- 18 ge1
- Comparator
- pooled F. poaee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“F. graminearum GA18W 3.1.4 produced higher SEV (47%–63%) and FDK (54%–76%) and reduced TKW (to 18 g) relative to pooled F. poae (SEV 14%–36%; FDK 32%–56%; TKW up to 24 g)”
e2“poses a major threat to wheat and barley production”
Claim · model-written summary
No consistent differences in disease were detected among the four F. poae isolates on wheat and barley.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Treatment
- four F. poae isolatese3
- Interactor
- F. poaeFusarium poaee3pathogen
- Outcome
- differencese3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“poses a major threat to wheat and barley production”
e3“no consistent isolate‐level differences were detected among the four F. poae isolates”
Claim · model-written summary
Isolate, cultivar and inoculation method had significant main effects on SEV, FDK and TKW.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Treatment
- inoculation methode4
- Outcome
- SEV, FDK and TKWe4
- Qualifier
- p < 0.0001e4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“poses a major threat to wheat and barley production”
e4“Main effects of the isolate, cultivar and inoculation method were significant for SEV, FDK and TKW ( p < 0.0001 )”
Claim · model-written summary
Fusarium poae can contribute to Fusarium head blight in US small-grain cereals.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Interactor
- F. poaeFusarium poaee5pathogen
- Outcome
- can contribute to FHBe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“poses a major threat to wheat and barley production”
e5“These results demonstrate that F. poae can contribute to FHB”
Claim · model-written summary
The authors support considering F. poae in resistance screening programmes for small-grain cereals.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Outcome
- consideration of this species in resistance screening programmese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“poses a major threat to wheat and barley production”
e6“support consideration of this species in resistance screening programmes”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.