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The French walnut improvement program: preliminary investigations

hal.structure.identifierCtifl - Centre de Lanxade [Ctifl - Centre de Lanxade ]
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorBERNARD, Anthony
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorDIRLEWANGER, E.
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorLHEUREUX, Fabrice
dc.date.issued2020
dc.date.conference2018-08-12
dc.identifier.isbn978-94-62612-78-5
dc.description.abstractEnWith 36,000 t of in-shell walnuts produced in 2016, France is in 9 th world position among major producers. Walnut orchards increased by almost 20% between 2000 and 2010, and walnut is the most important crop other than apple. Nevertheless, the varietal choice does not appear to be adapted to the new future constraints and the new French walnut improvement program, led by the Ctifl, has to take into account the global warming context and the reduced use of plant protection products. In this way, two preliminary studies have been conducted regarding the effect of climate change on walnut phenology under French climate conditions, and concerning an emerging disease in French walnut orchards, a form of anthracnose, due to Colletotrichum acutatum. On the one hand, as regards phenology aspect, chronological data have been collected for the two most produced cultivars ('Franquette' and 'Lara') in France. A significant advance in bud break date and male and female flowering dates was found. On the other hand, as concerns the emerging disease, a qualitative detached leaf assay (absence or presence of necrosis) have been carried out in order to quickly find out which accessions of the French germplasm (including 220 accessions of J. regia, the cultivated walnut tree, and 39 accessions of related species) are tolerant. Results show that, after 7 days of spores inoculation on detached leaflets, all J. regia accessions have specific symptoms of anthracnose due to C. acutatum (black to brown spots with orange acervules) while two related species, J. cinerea and J. sieboldiana, do not present any symptom, revealing a potential tolerance to C. acutatum.
dc.language.isoen
dc.publisherISHS
dc.source.titleActa Horticulturae
dc.subjectfruit
dc.subjectarbre fruitier
dc.subjectnoyer
dc.subject.enJuglans regia L.
dc.subject.enFrench walnut improvement program
dc.subject.enchronological data
dc.subject.enphenology
dc.subject.enColletotrichum acutatum
dc.subject.endetached leaflet assay
dc.title.enThe French walnut improvement program: preliminary investigations
dc.typeCommunication dans un congrès
dc.identifier.doi10.17660/actaHortic.2020.1280.11
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Amélioration des plantes
bordeaux.page77-84
bordeaux.issue1280
bordeaux.conference.titleXXX IHC-Int. Symposium on Nuts and Mediterranean Climate Fruits: Advances in Breeding and New Strategies of Horticultural Management for Sustainable Production
bordeaux.countryTR
bordeaux.title.proceedingActa Horticulturae
bordeaux.conference.cityIstanbul
bordeaux.peerReviewedoui
hal.identifierhal-03356248
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.organizerISHS
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03356248v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Acta%20Horticulturae&rft.date=2020&rft.issue=1280&rft.spage=77-84&rft.epage=77-84&rft.au=BERNARD,%20Anthony&DIRLEWANGER,%20E.&LHEUREUX,%20Fabrice&rft.isbn=978-94-62612-78-5&rft.genre=unknown


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