Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Resistance to Rhynchosporium commune in a collection of European spring barley germplasm
Ist Teil von
Theoretical and applied genetics, 2018-12, Vol.131 (12), p.2513-2528
Ort / Verlag
Berlin/Heidelberg: Springer Berlin Heidelberg
Erscheinungsjahr
2018
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
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
.
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.