Genetic Polymorphism in Populations of Hieracium × robustum (Asteraceae) as Result of the Hallabrottet Aulacidea hieracii (Hymenoptera: Cynipidae) Influence

Based on Inter Simple Sequence Repeats (ISSR), we examined polymorphism in populations of Hieracium × robustum (Asteraceae) – the host of gall-making Aulacidea hieracii (Hymenoptera, Cynipidae). In each population, we studied H. × robustum specimens with and without stem galls induced by gall wasps. It was revealed that individual gallfree plants have half as much ISSR fragments as plants contaminated by galls. In agarose gel, ISSR fragments of the former have clear-cut patterns while patterns of gall-contaminated plants are shapeless.