Rhynchosporium leaf scald disease incidence: seed source and spatial pattern

Topp, Cairistiona F. E.; Hughes, G.; Nevison, I. M.; Butler, Adam; Oxley, S. J. P.; Havis, Neil D.

doi:10.1111/ppa.13019

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…R. commune survives between seasons on barley residues, and conidiophores are produced on infected crop residues, which produce spores that infect the subsequent crop. The pathogen can also be carried in the tissue of infected seeds (Brunner et al, 2007;Topp et al, 2019). Long-distance transmission can occur by sowing infected seed or movement of stubble as hay, spreading R. commune to new geographical locations.…”

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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“…Initial symptoms of wheat stripe rust occur in foci and may spread to the entire field if left untreated (109). For Rhynchosporium leaf scald of barley, an aggregated pattern has been described based on visual inspections, suggesting that Rhynchosporium commune is seed-transmitted and polycyclic (136). Geostatistical analyses of rice blast incidence in China revealed spatial dependence at the regional and field levels (5 to 10 m) but not at the county scale (36).…”

Section: Development Of Diseases In Time and Space: The Role Of Biologymentioning

confidence: 99%

Remote Sensing of Diseases

Oerke

2020

Annu. Rev. Phytopathol.

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Detection, identification, and quantification of plant diseases by sensor techniques are expected to enable a more precise disease control, as sensors are sensitive, objective, and highly available for disease assessment. Recent progress in sensor technology and data processing is very promising; nevertheless, technical constraints and issues inherent to variability in host–pathogen interactions currently limit the use of sensors in various fields of application. The information from spectral [e.g., RGB (red, green, blue)], multispectral, and hyperspectral sensors that measure reflectance, fluorescence, and emission of radiation or from electronic noses that detect volatile organic compounds released from plants or pathogens, as well as the potential of sensors to characterize the health status of crops, is evaluated based on the recent literature. Phytopathological aspects of remote sensing of plant diseases across different scales and for various purposes are discussed, including spatial disease patterns, epidemic spread of pathogens, crop characteristics, and links to disease control. Future challenges in sensor use are identified.

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Genome-Wide Association Study for Identification of Marker-Trait Associations Conferring Resistance to Scald from Globally Collected Barley Germplasm

Ijaz,

Zhao,

Shahbala

et al. 2024

Phytopathology®

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Scald is one of the major economically important foliar diseases in barley, causing susceptible varieties up to 40% of yield loss. The identification of quantitative trait loci (QTL) and elite alleles that confer resistance to scald is imperative in reducing the threats to barley production. In this study, genome-wide association studies (GWAS) were conducted using a panel of 697 barley genotypes to identify QTL for scald resistance. Field experiments were conducted over three consecutive years. Among different models used for GWAS analysis, FarmCPU was shown to be the best-suited model. Nineteen significant marker-trait associations (MTAs) related to scald resistance were identified across six different chromosomes. Eleven of these MTAs correspond to previously reported scald resistance genes Rrs1, Rrs4, and Rrs2, respectively. Eight novel MTAs were identified in this study with the candidate genes encoding a diverse class of proteins including region leucine-rich repeats (LRR), AP2/ERF transcription factor, homeodomain-leucine zipper, and protein kinases family proteins. The combination of identified superior alleles significantly reduces disease severity scores. The results will be valuable for marker-assisted breeding for developing scald-resistant varieties.

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Rhynchosporium leaf scald disease incidence: seed source and spatial pattern

Cited by 5 publications

References 27 publications

Recent insights into barley and Rhynchosporium commune interactions

Recent insights into barley and Rhynchosporium commune interactions

Remote Sensing of Diseases

Genome-Wide Association Study for Identification of Marker-Trait Associations Conferring Resistance to Scald from Globally Collected Barley Germplasm

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