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Testing resistance to chestnut blight of hybrid chestnutsAuthor(s): Cécile Robin; Xavier Capdevielle; Gille Saint-Jean; Teresa Barreneche
Source: In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. p. 325
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: Download Publication (138.98 KB)
DescriptionCastanea sativa Mill. is an ecologically and economically important species in Europe, not only as a forest tree, but also as a fruit tree. It is dramatically threatened by ink disease caused by Phytophthora spp., introduced during the nineteenth century. To limit its impact, C. mollissima and C. crenata, which proved to be tolerant species, were imported from China and Japan to Europe at the beginning of the twentieth century, together with the agent of chestnut blight (Cryphonectria parasitica) which is now spreading throughout Europe. A clonal selection has resulted in the use of a few inter-specific hybrids as rootstocks tolerant to ink disease, and onto which fruit cultivars are grafted, as fruit cultivars for the fruit quality and as forest clones selected for growth characteristics. New chestnut forest plantations are clonal in Spain, but not yet in France. However, with the threat of increasing loss due to ink disease and chestnut blight, hybrid clones are seen as a promise by some foresters. Our aim was to test the resistance to chestnut blight of hybrid chestnuts which are used as rootstocks or grafted varieties for fruit production, or inter-specific full sib families used for building chestnut maps. Field testing revealed significant differences among genotypes: some fruit cultivars being less susceptible than the large majority, in agreement with field observations. With excised stem assays, a large phenotypic variation within the F1 progeny was observed.
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CitationRobin, Cécile; Capdevielle, Xavier; Saint-Jean, Gille; Barreneche, Teresa. 2012. Testing resistance to chestnut blight of hybrid chestnuts. In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. p. 325.
Keywordsforest disease and insect resistance, evolutionary biology, climate change, durable resistance
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