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First hybrid plane trees to show resistance against canker stain (Ceratocystis fimbriata f. sp. platani)

Abstract : Canker stain, caused by the ascomycete Ceratocystis fimbriata f. sp. platani, is a major threat to plane trees in Europe. The American plane tree (Platanus occidentalis) carries some genetic resistance, but this species is not adapted to the climatic conditions in Europe. Therefore, hybrids between susceptible oriental plane trees (Platanus orientalis) and resistant P. occidendalis were screened for disease resistance in France. Among 960 hybrids, we found 18 individuals which survived two successive inoculations. These putatively resistant trees were cut back and, after 18 months, on each tree 12 of the newly produced shoots as well as two roots, were inoculated again. From these trees, only one showed complete and another one partial resistance. This selection process resulting in the resistant clone ‘Vallis clausa’ is described in detail.
Mots-clés : PLATANE
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https://hal.inrae.fr/hal-02682030
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Submitted on : Monday, June 1, 2020 - 12:18:35 AM
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André Vigouroux, R. Olivier. First hybrid plane trees to show resistance against canker stain (Ceratocystis fimbriata f. sp. platani). Forest Pathology, Wiley, 2004, 34, pp.307-319. ⟨10.1111/j.1439-0329.2004.00372.x⟩. ⟨hal-02682030⟩

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