Secretariat Großhansdorf

Irene Joraszik

Sieker Landstraße 2
22927 Großhansdorf
Phone: +49 4102 696 0
Fax: +49 4102 696 200

Location manager Waldsieversdorf

  • Volker Schneck

Secretariat Waldsieversdorf

Stefanie Mordau

Eberswalder Chaussee 3a
15377 Waldsieversdorf
Phone: +49 33433 157 0
Fax: +49 33433 157 199

ResEsche - selection of resistant ash trees



Conservation of common ash (Fraxinus excelsior by establishment of a seed orchard with clones with resistance against ash dieback;

Sub-project 2: Phytopathological and gentical characterisation and
vegetative propagation of healthy plus trees

Ash dieback caused by Hymenoscyphus fraxineus) has become to a serious threat for the survival of common ash (Fraxinus excelsior L.) in Europe. The disease proceeds steadily also in
Mecklenburg-Vorpommern. Especially the economical and ecological damages are serious in the coastal region of Mecklenburg-Vorpommern, where ash is growing as sole tree species at wet sites. Therefore planting of ash is essential in the frame of close to nature forestry in Mecklenburg-Vorpommern.
Propagation material with high resistance (determined genetically) against the fungus is needed in sufficient amount for reforestation of damaged sites.

Background and Objective

In sub-project 2 plus trees selected in sub-project 1 will be characterised phytopathologically and molecular genetically. These information are necessary for the final selection of the trees used for the seed orchard. Furthermore results were expected to genetical varibility and diversity of ash in the northern part of
Molecular markers will be developed and used for the detection of the fungus in plant material. So it will be possible to test trees which seem to be healthy visually if they are infested by the fungus. Furthermore results are expected concerning the gentical diversity of Hymenoscyphus.
Methods will be improved for vegetative propagation of ash. Selected plus trees resistant to ash dieback will be propagated vegetatively for the planned seed orchard



1. Development and adaptation of methods for the pytopatholgical and molecular genetical characterisation of ash
2. Identification by genotyping of single trees, investigation of diversity and genflow within and between stands of common ash, and comparison of genetic structure of infested and non-infested trees.
3. Characterisation of resistance status of selected plus trees.
4. Vegetative propagation of selected plus trees with high resistance for the establishment of a seed orchard.

Our Research Questions


In spring 2019 ramets of 60 clones of ash plus trees were planted for the new seed orchard in Mecklenburg-Vorpommern. These clones had shown a high level of resistance in a two-step test before.


Involved Thünen-Partners

Involved external Thünen-Partners

  • Landesforst Mecklenburg-Vorpommern (FVI)
    (Schwerin, Deutschland)

Funding Body

  • Federal Ministry of Food und Agriculture (BMEL)
    (national, öffentlich)


7.2016 - 9.2021

More Information

Projekt type:
Project funding number: 22019915
Funding program: FNR
Project status: finished

Publikationen zum Projekt

hits: 4

  1. Past F, Schrader M, Bubner B, Schneck V, Röhe P (2021) Forschungsprojekt "ResEsche" - Chance für die Baumart Esche. AFZ Wald 76(8):12-16
    pdf document (limited accessibility) 988 kb
  2. Liesebach M (2021) Forstpflanzenzüchtung gewinnt an Bedeutung. In: Seeling U (ed) Forst Holz & Jagd Taschenbuch 2022. München: Deutscher Landwirtschaftsverl, pp 211-215
  3. Past F, Bubner B, Mewis I (2020) Erste Experimente zum Einfluss von Sphinx ligustri L. auf das In-vitro-Wachstum und den Hormonhaushalt in den Blättern von Fraxinus excelsior L.. Thünen Rep 76:182-200
    pdf document (limited accessibility) 1305 kb
  4. Liesebach M (2020) Es gibt wieder mehr Hoffnung für die Esche. Holz Zentralbl 146(4):59
    pdf document (limited accessibility) 4789 kb