Opbrengst en kwaliteitsverlies door wortelknobbel- en wortellesie aaltjes nemen om diverse redenen toe. Telers zullen gebaat zijn bij het gebruik van resistente aardappelrassen. Helaas zijn er nog geen tot weinig resistente rassen voor de verschillende aaltjes. Door eerder onderzoek zijn er echter wel resistentie bronnen beschikbaar. In dit project zoeken we uit tegen welke aaltjes de verschillende resistenties werken zodat veredelaars ze gericht kunnen selecteren en combineren in nieuwe rassen voor de duurzame teeltsystemen van de toekomst.

The final objective of this project is to provide resistance sources, pre-breeding material, and
molecular markers for the development of resistant varieties having broad-spectrum to both RKN and RLN: M.
chitwoodi, M. hapla and P. penetrans. This objective will be achieved by advanced in vitro inoculation assays that
need to be implemented and validated for RKN and RLN. Using these assays, two types of (potentially) resistant
plant material will be (further) characterised. The first one is an in vitro collection of 100+ tuber forming wild
potato relatives from WUR-PBR. The second consists of advanced breeding materials (at different stage of back
crossing), also available at WUR-PBR from previous research projects that focussed on M. chitwoodi and M. hapla
resistance.

- Information on resistance in the Solanum genotypes and advanced breeding materials to the targeted PPN
- The PPN resistance spectrum of the selected plant material
- Seeds form crossable genotypes
- In vitro plants and (if possible) tubers from mapping populations
- Molecular markers for the identified loci for further breeding studies
- An outlook for the deployment of the identified PPN resistances in INM, to inform combined resistances in breeding strategies