Resistance to Rhynchosporium commune in a collection of European spring barley germplasm
| Autor: | Mark E. Looseley, Kathryn M. Wright, Paul Shaw, L. Griffe, Anna O. Avrova, William T. B. Thomas, Hazel Bull, Jill Middlefell-Williams, Joanne Russell, Günther Schweizer, Malcolm Macaulay, Allan Booth, Bianca Büttner, Robbie Waugh |
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| Přispěvatelé: | University of St Andrews. School of Biology |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Germplasm Genetic Markers Quantitative trait loci Genotype QH301 Biology Rhynchosporium Quantitative Trait Loci Locus (genetics) QH426 Genetics Quantitative trait locus Plant disease resistance 01 natural sciences Polymorphism Single Nucleotide Hordeum-vulgare QH301 03 medical and health sciences Ascomycota Genetics Association mapping Vulgare ssp spontaneum QH426 Genetic Association Studies Disease Resistance Plant Diseases Form net blotch biology food and beverages Chromosome Mapping DAS Hordeum General Medicine biology.organism_classification 030104 developmental biology Phenotype Genetic marker Hordeum vulgare Agronomy and Crop Science Multiple disease resistance 010606 plant biology & botany Biotechnology |
| Zdroj: | TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 131(12) |
| ISSN: | 1432-2242 |
| Popis: | Key message Association analyses of resistance to Rhynchosporium commune in a collection of European spring barley germplasm detected 17 significant resistance quantitative trait loci. The most significant association was confirmed as Rrs1. Abstract Rhynchosporium commune is a fungal pathogen of barley which causes a highly destructive and economically important disease known as rhynchosporium. Genome-wide association mapping was used to investigate the genetic control of host resistance to R. commune in a collection of predominantly European spring barley accessions. Multi-year disease nursery field trials revealed 8 significant resistance quantitative trait loci (QTL), whilst a separate association mapping analysis using historical data from UK national and recommended list trials identified 9 significant associations. The most significant association identified in both current and historical data sources, collocated with the known position of the major resistance gene Rrs1. Seedling assays with R. commune single-spore isolates expressing the corresponding avirulence protein NIP1 confirmed that this locus is Rrs1. These results highlight the significant and continuing contribution of Rrs1 to host resistance in current elite spring barley germplasm. Varietal height was shown to be negatively correlated with disease severity, and a resistance QTL was identified that co-localised with the semi-dwarfing gene sdw1, previously shown to contribute to disease escape. The remaining QTL represent novel resistances that are present within European spring barley accessions. Associated markers to Rrs1 and other resistance loci, identified in this study, represent a set of tools that can be exploited by breeders for the sustainable deployment of varietal resistance in new cultivars. Postprint |
| Databáze: | OpenAIRE |
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