Breeding Apples with Durable Resistance on the Genetic Basis Of

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$EVWUDFW Breakdown of Rvi6 resistance against 9HQWXULDLQDHTXDOLV accelerated the search for new sources of resistance to apple scab. On the one hand breeders are working with resistance genes from wild malus species, on the other hand genes derived from old local varieties conferring partial resistance have become a focus in recent times. Approaches followed by LVWO Weinsberg show that crossings with old local varieties based on partial resistance need to have a higher number of descendants for getting resistant plants than crossings with wild malus species detected by gene analysis. Information on the resistance of old local varieties against apple scab is insufficient because data were not gained under intensive orchard conditions.

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