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ISHS Acta Horticulturae 814: XII EUCARPIA Symposium on Fruit Breeding and Genetics

SELECTION EFFICIENCY IN APPLE BREEDING

Authors:   M. Kellerhals, M. Spuhler, B. Duffy, A. Patocchi, J.E. Frey
Keywords:   apple scab, marker-assisted selection, fire blight, early selection, breeding, fruit quality
DOI:   10.17660/ActaHortic.2009.814.22
Abstract:
Selection efficiency is a key issue in a breeding programme. Breeding consists of identifying as quickly and as precisely as possible the most promising progeny plants. It is a challenge to efficiently find the outstanding genotypes prone to become a successful commercial variety out of a large quantity of progeny plants. Selection efficiency in apple breeding starts with the appropriate choice of parents. To breed for disease resistant varieties, early phenotypic screening tests of progenies e.g., for scab resistance are performed. However, for other diseases such as powdery mildew and fire blight, at ACW, selection is made only at a later stage. Marker-assisted selection (MAS) allows selecting of tree and fruit characters more efficiently. It is applied in the ACW breeding programme to select for scab, mildew, fire blight resistance, and primarily to pyramid resistances. How can this molecular selection method reasonably be integrated in an apple breeding programme? Application of phenotypic and molecular early selection techniques in the apple breeding programme at Agroscope Changins-Wädenswil including MAS is outlined.

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