Claim · model-written summary
qRphFlag on chromosome 5HS accounted for up to 85% of the phenotypic variation for leaf rust resistance in field environments.
- Taxon
- barley
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Hordeum vulgaret0 - Gene
- qRphFlage1
- Outcome
- phenotypic variatione1
- Value
- 85%e1
- Setting
- field environmentse1
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e1“qRphFlag was mapped to the short arm of chromosome 5H (5HS), accounting for up to 85% of the phenotypic variation in field environments and 56% under controlled environmental conditions (CEC)”
t0“barley population”
Title
Lee T. Hickey Queensland's institutional digital repository (The University of Queensland) 2012
Other claims from this paper (17)
- Observation QTL for the three traits were detected on all seven barley chromosomes.
- Observation Seven major QTL, representing six independent genomic regions, were critical for expression of the three traits across multiple environments.
- Association qRphFlag on chromosome 5HS accounted for up to 56% of the phenotypic variation under controlled environmental conditions.
- Association qRphND on chromosome 6HL had a smaller effect than qRphFlag.
- Association Three QTL contributed partial resistance to Blumeria graminis (powdery mildew) detected in at least two of the three test environments.
- Association A QTL on chromosome 3H, donated by Flagship, accounted for up to 18.6% of the phenotypic variation.
- Association A QTL on chromosome 4H, donated by Flagship, accounted for up to 3.4% of the phenotypic variation.
- Association A QTL on chromosome 5HS, donated by Flagship, accounted for up to 8.8% of the phenotypic variation.
- Association The 5HS QTL contributed partial resistance to B. graminis in all field environments and aligned with the genomic region of Rph20.
- Observation The qRphFlag resistance allele is Rph20, the first gene conferring adult plant resistance to Puccinia hordei characterized in barley.
- Observation The qRphFlag resistance allele was common in leaf rust resistant cultivars derived from Vada and Emir.
- Observation Some DH lines displayed moderate to high levels of grain dormancy although both parental lines were non-dormant.
- Association qSDFlag, close to the centromeric region of chromosome 5H, accounted for up to 15% of the phenotypic variation in grain dormancy.
- Association qSDND, mapped to chromosome 5HL, had a larger effect and accounted for up to 35% of the phenotypic variation in grain dormancy.
- Observation None of three DH lines carrying all six major QTL displayed high phenotypic values across multiple environments.
- Mechanism Additional genes with small effect appear to be required to achieve both high disease resistance and grain dormancy in barley.
- Recommendation Breeding strategies can accelerate the introgression of multiple target traits into adapted cereal cultivars.