The parental species occur in widely different habitats, have different herbivore guilds and do contain  different secondary metabolites.

We will first focus on traits associated with herbivore resistance and herbivore attraction. Which traits are involved in the deterrence, recognition of the foodplants by specialist herbivores, oviposition and feeding stimulation? an example of an hybride

Data on ovipostion rates of the Cinnabar moths, resistance to thrips have already been recorded.  These traits will be correlated with whole metabolome NMR data and the detailed analysis of  pyrrolizidine alkaloids that are already available for more than 100 F2 offspring from roots and shoots. All herbivore and chemical traits will be mapped on the genetic chart.   


In addition we have been studying flooding resistance. It appears that J. aquatica is very well adapted to flooding, while J. vulgaris is not.

Flower morphology and flower developmental genes are studied in cooperation with the National Herbarium of The Netherlands.

For all traits measured up to now highly significant differences were found between F2 genotypes and in almost all cases transgressive segregation was found.