ISHS Acta Horticulturae 538: Eucarpia symposium on Fruit Breeding and Genetics
SEARCH FOR POLYGENIC SCAB AND MILDEW RESISTANCE IN APPLE VARIETIES CULTIVATED AT THE FRUIT GENEBANK DRESDEN-PILLNITZ |
| Authors: | M. Fischer, F. Dunemann |
| Keywords: | Apple, old cultivars, scab, mildew, polygenic resistance, marker analysis, breeding |
| Abstract:
In the Fruit Genebank at Dresden-Pillnitz the stocks of fruit cultivars are evaluated with particular reference to their resistance properties and fruit quality. In this way we contribute to the selection of cultivars for integrated and organic production methods and also to the choice of parents for breeding programmes. Highly-susceptible cultivars need intensive plant protection measurements and their fruits cannot be produced with standard quality in organic production. Resistant cultivars are more suitable for such methods of production. In the evaluation of more than 800 old and newly bred apple cultivars, the most susceptible ones were found to be cultivated all round the world. Only 30 old cultivars showed a low level of infection. These cultivars can be regarded as carriers of polygenic scab and mildew resistance. A marker analysis gave no indication of the existence of the well-known genes for monogenic resistance to scab or mildew. These old cultivars are suitable for use in landscape improvement, for small orchards and home gardens and as crossing partners for transferring polygenic resistance in fruit breeding. | |
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