Abstract :
Using standardized conditions, 65 genotypes oi Gladiolus
were screened for Fusarium resistance. High levels were
found in ʹlarge-flowered" types, Primulinus hybrids, G.
callianthus, G. garnierii, and G. dalenii. Some accessions
of G. dalenii exhibited no disease symptoms when inoculated
with two standard test isolates. No resistance was
found in ʹsmall-floweredʹ types. To estimate race-specifity
of the resistance, eight highly resistant Gladiolus genotypes
were tested in an in vitro test against 43 isolates of
F. oxysporum f.sp. gladioli. Two isolates were able to
partially infect the G. dalenii accessions and this was
confirmed using whole plants. Implications for resistance
breeding are discussed
