Summary
This study systematically characterised genes for resistance to stripe rust (Puccinia striiformis f. sp. hordei) in 18 barley genotypes by crossing all possible pairs and evaluating F2 progeny under controlled conditions. At least 26 distinct resistance genes were identified across the panel, with seven genotypes harbouring complete resistance to all U.S. races tested. The genetic mapping and allelic relationships established provide foundational knowledge for host–pathogen interactions and breeding strategies for durable stripe rust control.
Regional applicability
Stripe rust resistance in barley is agronomically important in the United Kingdom and Europe, though the study was conducted with U.S. races. The identified genes and their relationships may be transferable to UK breeding programmes, though resistance efficacy depends on the pathogen races present in different regions.
Key measures
Seedling resistance phenotype to selected stripe rust races; segregation patterns in F2 progeny; allelic and linkage relationships of resistance genes
Outcomes reported
The study identified at least 26 different genes for resistance to Puccinia striiformis f. sp. hordei across 18 barley genotypes and determined allelic and linkage relationships among some of these genes. Seven genotypes were found to be resistant to all detected races, whilst eleven showed partial resistance.
Topic tags
Dig deeper with Pulse AI.
Ask about this record, its theme or its relevance to UK farming and policy. Pulse AI uses selected catalogue evidence and cites the sources it draws on.