The genetic diversity of Icelandic populations of two barley leaf pathogens, Rhynchosporium commune and Pyrenophora teres

Stefansson, Tryggvi S.; Serenius, Marjo; Hallsson, Jón Hallsteinn

doi:10.1007/s10658-012-9974-8

Cited by 13 publications

(14 citation statements)

References 44 publications

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“…Studies into the infection pathways of the pathogen have revealed there are three main routes of transmission: between seasons, across locations, and within the plant. These transmission pathways were recently reviewed by Fountaine et al (2010), and Stefansson et al (2012). R. commune survives between seasons on barley residues, and conidiophores are produced on infected crop residues, which produce spores that infect the subsequent crop.…”

Section: Introductionmentioning

confidence: 99%

Recent insights into barley and Rhynchosporium commune interactions

Zhang

Ovenden

Milgate

2020

Molecular Plant Pathology

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Rhynchosporium commune is the causal pathogen of scald in barley ( Hordeum vulgare ), a foliar disease that can reduce yield by up to 40% in susceptible cultivars. R. commune is found worldwide in all temperate growing regions and is regarded as one of the most economically important barley pathogens. It is a polycyclic pathogen with the ability to rapidly evolve new virulent strains in response to resistance genes deployed in commercial cultivars. Hence, introgression and pyramiding of different loci for resistance (qualitative or quantitative) through marker‐assisted selection is an effective way to improve scald resistance in barley. This review summarizes all 148 resistance quantitative trait loci reported at the date of submission of this review and projects them onto the barley physical map, where it is clear many loci co‐locate on chromosomes 3H and 7H. We have summarized the major named resistance loci and reiterated the renaming of Rrs15 (CI8288) to Rrs17 . This review provides a comprehensive resource for future discovery and breeding efforts of qualitative and quantitative scald resistance loci.

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Section: Introductionmentioning

confidence: 99%

Recent insights into barley and Rhynchosporium commune interactions

Zhang

Ovenden

Milgate

2020

Molecular Plant Pathology

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“…Because the population genetics of all three pathogens has been well studied over many years (e.g. Zhan et al ., , ; Bennett et al ., ; Sommerhalder et al ., , ; Adhikari et al ., ; Zhan & McDonald, ; McDonald et al ., ; Stefansson et al ., ; Yang et al ., ), the selectively neutral and highly polymorphic molecular markers needed to tag and track pathogen genotypes across asexual generations in a mark–release–recapture experiment were already developed and validated. All of these properties combine to make these pathogens good model systems for field‐based experimental evolution studies that address fundamental questions associated with evolution of plant pathogens.…”

Section: Pathogen Systemsmentioning

confidence: 99%

Field‐based experimental evolution of three cereal pathogens using a mark–release–recapture strategy

Zhan

McDonald

2013

Plant Pathology

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Field-based experimental evolution is a research approach in which study species are allowed to evolve across several generations under well-defined field conditions. Field-based experiments in pathogen evolution became feasible with advances in molecular markers and computing technologies. Critical to success of these experiments is the choice of parental genotypes, molecular markers, experimental sites and field plot design. The current study used field-based experimental evolution based on a mark-release-recapture strategy to analyse the dynamics of interstrain competition and host specialization in the cereal pathogens Zymoseptoria tritici, Phaeosphaeria nodorum and Rhynchosporium commune. In all three pathogen-plant interactions, compelling evidence was found indicating that increasing host heterogeneity by growing cultivar mixtures slowed down the evolution of the corresponding pathogen populations. Evidence for differential selection between parasitic and saprophytic phases of the life cycle in P. nodorum and R. commune was also found. The effect of partial resistance on the evolution of the experimental pathogen populations was mixed. A decreased rate of evolution was found in the pathogen populations sampled from partially resistant hosts in Z. tritici and P. nodorum but not R. commune. The findings indicate that field-based experimental evolution offers a powerful approach to test hypotheses associated with the evolution of plant pathogens.

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“…The pathogen can cause up to 30–40% yield loss in susceptible cultivars and is found in all barley-growing regions worldwide 1 . Control of scald disease requires a multi-facetted approach, including application of fungicides, cultural disease management, manipulation of sowing date and the use of resistant cultivars 2 . R. commune populations have changed rapidly in response to newly-developed fungicides and resistant plant cultivars 3–6 .…”

Section: Introductionmentioning

confidence: 99%

“…A single dominant gene Rrs1 (Rh type) was first identified in cultivar ‘Brier’ 22 . Rrs1 (Rh4 type) was identified in cultivars ‘La Mesita’, ‘Trebi’ and ‘Osiris’, with a similar allele, termed Rh4 2 , identified in the cultivar ‘Modoc’ 23 . In ‘Turk’ and ‘Atlas46’, another resistance allele Rrs1 (Rh3 type) was identified closely linked to the Rrs1 (Rh4 type) from ‘Modoc’ 23 .…”

Section: Introductionmentioning

confidence: 99%

Bivariate analysis of barley scald resistance with relative maturity reveals a new major QTL on chromosome 3H

Zhang

Ovenden

Orchard

et al. 2019

Sci Rep

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The disease scald of barley is caused by the pathogen Rhynchosporium commune and can cause up to 30–40% yield loss in susceptible cultivars. In this study, the Australian barley cultivar ‘Yerong’ was demonstrated to have resistance that differed from Turk (Rrs1 (Rh3 type)) based on seedling tests with 11 R. commune isolates. A doubled haploid population with 177 lines derived from a cross between ‘Yerong’ and the susceptible Australian cultivar ‘Franklin’ was used to identify quantitative trait loci (QTL) for scald resistance. A QTL on chromosome 3H was identified with large effect, consistent with a major gene conferring scald resistance at the seedling stage. Under field conditions, a bivariate analysis was used to model scald percentage of infected leaf area and relative maturity, the residuals from the regression were used as our phenotype for QTL analysis. This analysis identified one major QTL on chromosome 3H, which mapped to the same position as the QTL at seedling stage. The identified QTL on 3H is proposed to be different from the Rrs1 on the basis of seedling resistance against different R. commune isolates and physical map position. This study increases the current understanding of scald resistance and identifies genetic material possessing QTLs useful for the marker-assisted selection of scald resistance in barley breeding programs.

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The genetic diversity of Icelandic populations of two barley leaf pathogens, Rhynchosporium commune and Pyrenophora teres

Cited by 13 publications

References 44 publications

Recent insights into barley and Rhynchosporium commune interactions

Recent insights into barley and Rhynchosporium commune interactions

Field‐based experimental evolution of three cereal pathogens using a mark–release–recapture strategy

Bivariate analysis of barley scald resistance with relative maturity reveals a new major QTL on chromosome 3H

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