Summary
Resistance to fungal diseases is given a high priority in the strawberry breeding programme at HRI, East Mailing although most primary screening is on the basis of fruit quality.
Wilt, caused by Verticillium dahliae, is an important soil-borne disease in the UK. Resistant genotypes are used extensively as parents and advanced selections are tested for resistance by planting in a heavily infested field. Pegasus, released in 1990, has a high level of field resistance to V dahliae. The inheritance of resistance is being studied using seedlings in both the field and glasshouse.
Work on resistance to Phytophthora cactorum (crown rot) began in 1992. Inoculation of potted plants with a zoospore suspension is an effective test but symptom development is slow and a large amount of replication is required for reliable results.
Powdery mildew (Sphaerotheca macularis) is a serious problem on everbearing strawberries. Each year the seedling population is screened by allowing a natural epidemic to develop in the field. Resistance is partly non-additive, so small test crosses are evaluated and those with good specific combining ability are repeated on a large scale.
There is no screening for resistance to Phytophthora gragariae at HRI but potential new cultivars are sent to the Scottish Crop Research Institute for testing their susceptibility to the common races of the disease.
The realtive resistance of recently released HRI cultivars to each of the above diseases is shown.
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References
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© 1994 Springer Science+Business Media Dordrecht
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Simpson, D.W., Bell, J.A., Harris, D.C. (1994). Breeding for resistance to fungal diseases in strawberry. In: Schmidt, H., Kellerhals, M. (eds) Progress in Temperate Fruit Breeding. Developments in Plant Breeding, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0467-8_13
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DOI: https://doi.org/10.1007/978-94-011-0467-8_13
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