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Authors
Advisor(s)
Abstract(s)
The interaction of five non-homologous portuguese isolates of A. candida
(four isolated from B. rapa – Ac506, Ac508, Ac509 and Ac510, and one
from Raphanus sativus) in forty B. oleracea accessions from different
geographic origins was evaluated at the cotyledonar stage. Some accessions
presented susceptibility to the non-homologous isolates of B. rapa, mainly
head cabbage ‘Large Blood Red’ and savoy cabbage ‘Brusselse Winter’.
These accessions exhibited mean levels of infection higher than 20 and 46.7%
respectively, independently of the B. rapa isolate tested. The isolates Ac508
and Ac510 revealed higher pathogenicity in the B. oleracea accessions tested
than isolates Ac506 and Ac509. The isolate from R. sativus was the less
pathogenic for the B. oleracea accessions tested. The kale ‘Verza San
Giovanni’ was the accession that exhibits higher susceptibility to this isolate
with 20.7% of infected plants. Non-homologous isolates of B. rapa and R.
sativus were able to colonize some B. oleracea host accessions, which means
that it is important to study the interaction and the variability between
different Brassica accessions and isolates, and to review the concept of
"races" of A. candida to formae speciales.
Description
Keywords
Brassica oleracea Albugo candida
Citation
Jorge, Lurdes; Dias, João Silva (2000). Interaction between non-homologous portuguese isolates of Albugo candida and Brassica oleracea. In Brassica 2000. 3rd ISHS International Symposium on Brassicas.12th Crucifer Genetics Workshop. Wellesbourne, UK
Publisher
Horticulture Research International (HRI)