Current study of Dutch elm disease causal agent in the Czech Republic

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F09%3A00146657" target="_blank" >RIV/62156489:43410/09:00146657 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Current study of Dutch elm disease causal agent in the Czech Republic
Original language description
Dutch elm disease caused by Ophiostoma ulmi (Buism.) Nannf. is present in the Czech republic since 1932. Presence of a new aggressive species O. novo-ulmi Bras. was revealed in 2006 by means of PCR. Up to now we have recorded both O. novo-ulmi subspecies- novo-ulmi and americana and their very frequent hybrids by means of PCR-RFLP in two gene regions. 13 czech strains were more particularly described from the point of view of cerato-ulmin production, mating type and vegetative compatibility type. Striking peculiarity is a strain M9 which doesn't produce any cerato-ulmin, although it was isolated from a tree with typical DED-symptoms. This strain is probably d-infected. One subspecies hybrid strain (M13) was used for infection tests on two DED-resistant elm hybrids. It was inoculated into 10 years old trees, and it caused high defoliation of hybrid 'Groeneveld' and low defoliation on hybrid 'Dodoens'.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GK - Forestry
OECD FORD branch
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Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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