Abstract
ABSTRACT Fusarium head blight (FHB) or scab is a destructive disease of barley in many countries. A better understanding of the interrelationships between plant traits and FHB resistance should help in the development of effective and efficient breeding strategies for FHB-resistant cultivars. Recent mapping studies indicate that many of the quantitative trait loci (QTL) for FHB resistance coincide with the QTL for plant height, heading date, and spike characteristics. Therefore, a study was conducted to investigate the relationship of morphological and physiological traits to FHB infection and deoxynivalenol (DON) accumulation in a barley doubled-haploid (DH) population derived from a Léger x CI9831 cross. Approximately 190 DH lines were grown at Ottawa (Ontario) for 2 years, Charlottetown (Prince Edward Island) for 1 year, and Hangzhou (Zhejiang) for 2 years. The field plots were inoculated with Fusarium graminearum at each location. FHB incidence was positively correlated with DON content. Resistance to FHB was associated with two-row spike, purple lemma, long glume awn, tall stature, and resistance to lodging, but it was not associated with long rachilla hairs, rough lemma awn, or heading date. Two-row spike was associated with tall stature and resistance to lodging. These associations as well as its spike characteristics helped reduce FHB infection and DON accumulation in two-row lines compared with six-row lines. The association between long glume awn and FHB resistance could be due to genetic linkages. Therefore, trait associations should be taken into consideration when breeding for FHB resistance and interpreting data from FHB experiments.
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Claims 7
Claim · model-written summary
FHB incidence correlated positively with DON content.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Compound
- DONe0
- Outcome
- FHB incidencee0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“FHB incidence was positively correlated with DON content”
t0“Barley”
Claim · model-written summary
FHB resistance was associated with two-row spike, purple lemma, long glume awn, tall stature, and lodging resistance.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- spikee0
- Interactor
- FHBe0pathogen
- Outcome
- Resistance to FHBe0
- Qualifier
- two-row spike, purple lemma, long glume awn, tall stature, and resistance to lodginge0
Not reportedMaterialDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance to FHB was associated with two-row spike, purple lemma, long glume awn, tall stature, and resistance to lodging”
t0“Barley”
Claim · model-written summary
FHB resistance was not associated with long rachilla hairs, rough lemma awn, or heading date.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- rachilla hairse0
- Outcome
- not associated with long rachilla hairs, rough lemma awn, or heading datee0
- Direction
- not associatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was not associated with long rachilla hairs, rough lemma awn, or heading date”
t0“Barley”
Claim · model-written summary
Two-row spikes were associated with tall stature and lodging resistance.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- Two-row spikee0
- Outcome
- tall stature and resistance to lodginge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-row spike was associated with tall stature and resistance to lodging”
t0“Barley”
Claim · model-written summary
Two-row lines had less FHB infection than six-row lines.
- Taxon
- barleyHordeum vulgaret0
- Material
- two-row linese0
- Interactor
- FHBe0pathogen
- Outcome
- FHB infectione0
- Direction
- reducee0
- Comparator
- six-row linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“helped reduce FHB infection and DON accumulation in two-row lines compared with six-row lines”
t0“Barley”
Claim · model-written summary
Two-row lines had less DON accumulation than six-row lines.
- Taxon
- barleyHordeum vulgaret0
- Material
- two-row linese0
- Outcome
- DON accumulatione0
- Direction
- reducee0
- Comparator
- six-row linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“helped reduce FHB infection and DON accumulation in two-row lines compared with six-row lines”
t0“Barley”
Claim · model-written summary
The association of long glume awns with FHB resistance could reflect genetic linkage.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- long glume awne0
- Outcome
- FHB resistancee0
- Qualifier
- genetic linkagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The association between long glume awn and FHB resistance could be due to genetic linkages”
t0“Barley”