J. Weibull, RESISTANCE TO RHOPALOSIPHUM-PADI (HOMOPTERA, APHIDIDAE) IN HORDEUM-VULGARE SUBSP SPONTANEUM AND IN HYBRIDS WITH HORDEUM-VULGARE SUBSP VULGARE, Euphytica, 78(1-2), 1994, pp. 97-101
Accessions of Hordeum vulgare subsp. spontaneum, the progenitor of cul
tivated barley, were screened in field and glasshouse trials for resis
tance to the aphid Rhopalosiphum padi. A few selected lines were furth
ermore hybridized with a modern barley variety and the resulting popul
ations evaluated. High levels of resistance were found among some of t
he 'spontaneum' accessions resulting in lower aphid growth rates (maxi
mum reduction 57%). Segregation patterns among siblings in F2 populati
ons were continuous, indicating the presence of several genes with pos
sibly additive effects. The usefulness of H. vulgare subsp. spontaneum
for breeding aphid resistant barley is discussed.