The present invention relates to a method for screening a population of plantsor plant parts for the presence therein of individuals that show a reduced discolourationas compared to a control plant or plant part, which method comprises providinga population of plants or parts of the plants from the population； optionallycreating a wound surface on the plants or plant parts； incubating the plant orplant parts or the wound surfaces created thereon to allow for discolourationto occur therein or thereon； observing the discolouration in or on the plantsor plant parts； comparing the observed discolouration with the discolourationthat is observed in the control plant or plant part to identify plants or plantparts that show no discolouration or a discolouration that is reduced as comparedto the control plant or plant part. Suitably, the discolouration is wound-induceddiscolouration.
