15th International Sunflower Conference Horizontal resistances in sunflower: a review of a workshop at the 15th International Sunflower Conference

Fernando Castano, Felicity Vear, Denis Tourvieille de Labrouhe
2001 Oléagineux, Corps gras, Lipides  
Un atelier sur la résistance horizontale, dans le cadre de la 15e Conférence sur le tournesol tenue à Toulouse, France du 12 au 16 juin 2000, a traité de l'évaluation, la stabilité et l'héritabilité des résistances du tournesol à Sclerotinia sclerotiorum, Diaporthe helianthi, Alternaria helianthi et Verticillium dahliae. On a pu remarquer que les recherches sur les meilleurs moyens d'évaluer la résistance continuent, en même temps que les études de génétique quantitative, la recherche de
more » ... recherche de marqueurs moléculaires et de QTL, et les essais d'amélioration de la résistance par transgenèse. Summary : A workshop on horizontal resistance at the 15th International Sunflower Conference, held in Toulouse, France, from June 12 to 16, 2000, covered topics including the evaluation, stability and inheritance of resistance of sunflower to Sclerotinia sclerotiorum, Diaporthe helianthi, Alternaria helianthi and Verticillium dahliae. It was notable that research continues into evaluation methodology at the same time as quantitative genetics, use of molecular markers, search for QTL and resistance improvement by genetic engineering. ARTICLE The 15th International Sunflower Conference held in Toulouse, France, from June 12 to 16, 2000, included a number of workshops dealing with the most important research subjects on sunflower. The present account provides a review of the results presented concerning Horizontal Resistance. The term Horizontal Resistance was proposed by Van der Plank [1] after analysis of diagrams, which showed the quantity of blight that several potato cultivars suffered when they were subjected to 16 races of Phytophtora infestans. These graphs showed the presence of a constant ranking of cultivars and pathogen races in order of resistance or aggressiveness, respectively, and the absence of significant interactions between host and pathogen genotypes. Sunflowers show Horizontal Resistance to a wide range of pathogens in different parts of the world [2] and since control is Article disponible sur le site http://www.ocl-journal.org ou http://dx.
doi:10.1051/ocl.2001.0211 fatcat:a3nej3wstncelebn3lp6x3jtuq