POLYMERASE CHAIN REACTION (GENETIC TECHNIQUES); VENTURIA + SCHORFKRANKHEITEN DES KERNOBSTES (PHYTOPATHOLOGIE); GENANALYSE (GENETISCHE TECHNIKEN); GENE ANALYSIS (GENETIC TECHNIQUES); RESISTANCE GENES (GENETICS); ÄPFEL + APFELBÄUME (OBSTBAU); SETOSPHAERIA + VENTURIA (MYKOLOGIE); GENETISCHE TRACERTECHNIKEN + MARKERGENE + REPORTERGENE (GENETISCHE TECHNIKEN); SETOSPHAERIA + VENTURIA (MYCOLOGY); APPLES + APPLE-TREES (FRUIT GROWING); RESISTENZZÜCHTUNG (KULTURPFLANZEN); RESISTANCE BREEDING (CULTIVATED PLANTS); RESISTENZGENE (GENETIK); GENETICAL TRACER TECHNIQUES + MARKER GENES + REPORTER GENES (GENETIC TECHNIQUES); MALUS (BOTANY); VENTURIA + SCAB DISEASES OF POME FRUIT (PLANT PATHOLOGY); POLYMERASEKETTENREAKTION (GENETISCHE TECHNIKEN); MALUS (BOTANIK)