Bud burst phenology, dormancy release and susceptibility to Dutch elm disease in elms (Ulmus spp.)

European elms (Ulmus glabra Huds., U. laevis Pall. and U. minor Mill.) have been damaged and are still threatened by an alien hypervirulent pathogen, Ophiostoma ulmi s.l., the agent of Dutch elm disease (DED). Therefore, several ex situ clone collections were established throughout Europe for breeding and conservation purposes. This thesis was carried out within the RESGEN CT96-78 project, which launched the EU-coordinated evaluation of these collections. The aim of this thesis was to analyse the variation in bud burst date and to acquire basic knowledge on the environmental control of this ad... Mehr ...