Major Susceptibility Gene Epistasis over Minor Gene Resistance to Spot Form Net Blotch in a Commercial Barley Cultivar

Mariano Jordi Muria-Gonzalez; Julie A. Lawrence; Elzette Palmiero; Nola K. D'Souza; Sanjiv Gupta; Simon R. Ellwood

doi:10.1094/PHYTO-10-22-0376-R

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Major Susceptibility Gene Epistasis over Minor Gene Resistance to Spot Form Net Blotch in a Commercial Barley Cultivar

Journal article

Open access

Peer reviewed

Major Susceptibility Gene Epistasis over Minor Gene Resistance to Spot Form Net Blotch in a Commercial Barley Cultivar

Mariano Jordi Muria-Gonzalez, Julie A. Lawrence, Elzette Palmiero, Nola K. D'Souza, Sanjiv Gupta and Simon R. Ellwood

Phytopathology, Vol.113(6), pp.1058-1065

2023

DOI: https://doi.org/10.1094/PHYTO-10-22-0376-R

PMID: 37454241

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Abstract

Life Sciences & Biomedicine

Plant Sciences

Science & Technology

Spot form net blotch, caused by Pyrenophora teres f. maculata, is a significant global disease of barley (Hordeum vulgare). Baudin, a barley cultivar that was until recently extensively grown in Western Australia, was reported as having minor seedling resistance. However, Baudin was highly susceptible to a local isolate, M3, suggesting that this isolate had gained virulence against a major susceptibility gene. M3 causes atypical lesions with pale centers early in the infection, with initial screens of a segregating population indicating that this was determined by a single locus in the Baudin genome. The susceptibility was semidominant in F-1 progeny and the susceptibility gene, designated Spm1 (Susceptibility to P. teres f. maculata 1), mapped to a 190-kb section of the resistance gene-rich Mla region of chromosome 1H. Phenotyping with Ptm SP1, a non-M3 pathotype, identified a seedling resistance locus on 2H. Minor gene resistance is generally regarded as potentially durable, but our findings suggest the resistance to spot form net blotch in Baudin is nullified by strong susceptibility conferred by a separate locus on 1H.

Details

Title: Major Susceptibility Gene Epistasis over Minor Gene Resistance to Spot Form Net Blotch in a Commercial Barley Cultivar
Authors/Creators: Mariano Jordi Muria-Gonzalez - Curtin University
Julie A. Lawrence - Curtin University
Elzette Palmiero - Curtin University
Nola K. D'Souza - Curtin University
Sanjiv Gupta - Murdoch Univ, Coll Sci Hlth Engn & Educ, Western Australian State Agr Biotechnol Ctr, Western Barley Genet Alliance, Murdoch, WA 6150, Australia
Simon R. Ellwood - Curtin University
Publication Details: Phytopathology, Vol.113(6), pp.1058-1065
Publisher: American Phytopathological Society
Number of pages: 8
Identifiers: 991005634369607891
Murdoch Affiliation: State Agricultural Biotechnology Centre; Western Barley Genetics Alliance
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.97 Plant Pathology; 3.97.636 Fungal Plant Pathogens
Web Of Science research areas: Plant Sciences
ESI research areas: Plant & Animal Science