Claim · model-written summary
High regional gene flow suggests wind-dispersed ascospores and movement of infected seed.
- Taxon
- R. communeRhynchosporium graminicolae1
- Outcome
- regional gene flowe0
- Qualifier
- wind‐dispersed ascospores and movement of infected seede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Verbatim
e0“High levels of regional gene flow suggest wind‐dispersed ascospores and movement of infected seed.”
e1“Coalescent analyses of several genes indicate that R. commune”
Title
B. A. McDonald Plant Pathology 2015. doi:10.1111/ppa.12415
Other claims from this paper (15)
- Observation Coalescent analyses date the origin of R. commune to about 2500 years ago, after barley domestication.
- Observation Phylogeographical analysis identifies Scandinavia as a diversity hotspot indicating northern European origin.
- Observation R. commune spread globally on infected seed and invaded the Fertile Crescent, infecting wild barley progenitors.
- Observation Gene-flow analysis found historical migration routes out of Scandinavia.
- Observation Modern R. commune gene flow is high among South Africa, Australia and New Zealand.
- Observation About 76% of global R. commune diversity occurs within barley fields.
- Observation All field populations showed genetic structure consistent with sexual recombination.
- Observation Pathogen aggressiveness, thermal sensitivity and fungicide resistance had high heritability across nine populations.
- Observation Pathogen aggressiveness, thermal sensitivity and fungicide resistance showed high diversity within nine populations.
- Association Field experiments found a fitness cost of complex virulence.
- Association Field experiments found a trade-off between pathogenic and saprophytic fitness.
- Observation The authors infer that global R. commune populations can evolve rapidly under environmental change.
- Recommendation The authors recommend focusing barley scald resistance breeding in northern Europe.
- Recommendation The authors recommend improving seed treatment, certification and quarantine to limit long-distance pathogen movement.
- Recommendation The authors recommend managing barley stubble to reduce pathogen population and sexual inoculum.