PROMOSOL
Durable resistance to downy mildew (Plasmopara halstedii) in sunflower
Project coordinator
Dr. Patrick Vincourt
LIPM (UMR 441-2594 INRA-CNRS)
BP 52627
Chemin de Borde Rouge - Auzeville
31326 Castanet Tolosan
Abstract
Plasmopara halstedii (downy mildew) is one of the potentially most dangerous diseases of sunflower in Europe. This disease is favoured by rainfall in spring and with the push to make earlier sowings to increase yields, the danger is likely to increase. Genetic resistance is the most efficient control method, but although new major genes giving complete resistance have been identified, after a few years use they are overcome by new races of P.halstedii. This project aims to provide tools and knowledge with the goal to draw scenarios allowing to establish strategies for a more durable resistance of sunflower to downy mildew. This will consist in developing genomic resources of P.halstedii for population genetics, studying the variability of pathogen populations and trying to determine how new races arise, and for pathotype identification ; identifying and mapping the major genes already found in large series of new sources of wild and cultivated sunflowers; fine mapping and cloning of a QTL already identified and explaining 30% of variance for a quantitative, race-non specific resistance in an RIL population, and also searching for QTL in another population to determine whether different resistance origins use different resistance mechanisms; building a Helianthus annuus genetic resource to allow more precise studies of the spatial and temporal host-parasite interaction.
Links :
http://lipm-helianthus.toulouse.inra.fr/dokuwiki/doku.php?id=start
http://www.heliagene.org/
http://www.heliagene.org/cgi/heliagene.cgi?__wb_session=WB12046189474944&__wb_main_menu=Collections&__wb_function=Collections
CNRGV involvement
Responsable : Sonia VAUTRIN
Partners
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Laboratoire “ Interactions Plantes Microorganismes”, UMR 441-2594(INRA-CNRS)
INRA-CNRS
31326 CASTANET TOLOSAN
Managing Director : Pascal GAMAS
Scientist in charge of the project : Patrick VINCOURT
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UMR 1095 “ Amélioration et Santé des Plantes ”
INRA – Université Blaise Pascal
63100 CLERMONT-FERRAND
Managing Director : Gilles CHARMET
Scientist in charge of the project : Felicity VEAR - D.TOURVIEILLE
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UMR 1065 « Santé végétale »des Plantes
INRA/ENITA Bordeaux
33883 VILLENAVE-D'ORNON CEDEX
Managing Director : D. THIERRY
Scientist in charge of the project : F. DELMOTTE
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UR 1258 Centre National de Ressources Génomiques Végétales
CNRGV -INRA
31326 CASTANET TOLOSAN
Managing Director / Scientist in charge of the project : Helène BERGES