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A gene-for-gene model to explain interactions between cultivars of strawberry and races of Phytophthora fragariae var. fragariae
Authors:W.E. van de Weg
Affiliation:(1) Centre for Plant Breeding and Reproduction Research (CPRO-DLO), Department of Vegetable and Fruit Crops, P.O. Box 16, 6700 AA Wageningen, The Netherlands, NL
Abstract: A gene-for-gene model is postulated to explain the observed interactions between cultivars of strawberry and races of Phytophthora fragariae. Five interacting resistance (R1–R5) and avirulence (Avr1–Avr5) factors explain all the available data involving 15 host genotypes, including the USA and Canadian differential series, and 12 pathogen isolates from North America. Interactions between pathogen isolates and UK and German differentials are also explained by the proposed model. The model makes it possible to develop a universally applicable differential series, to present a systematic, unequivocal nomenclature of races, and to increase the efficiency of breeding programs. Received: 26 April 1996 / Accepted: 19 July 1996
Keywords:  Fragaria spp.  Red stele  Red core  Resistance
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