Genetic and functional characterization of the peach - Myzus persicae interaction : towards breeding for durable resistance within integrated orchard management
Sauge , Marie-Hélène (INRA (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Pascal , Thierry (INRA (France). UR 1052 Génétique et Amélioration des Fruits et Légumes) | Kervella , Jocelyne (INRA (France). UR 1052 Génétique et Amélioration des Fruits et Légumes) | Lacroze , Jean Philippe (INRA (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Corre , Marie Noëlle (INRA (France). UR 1052 Génétique et Amélioration des Fruits et Légumes) | Pfeiffer , Frédéric (INRA (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Grechi , Isabelle (INRA (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Lescourret , Francoise (INRA (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Moing , Annick (INRA , VILLENAVE D'ORNON CEDEX (France). UMR 1332 UMR INRA / Univ. Bordeaux 1 / Univ. Bordeaux 2 : Biologie du Fruit et Pathologie) | Renaud , Christel (Université Bordeaux 1, Villenave d'Ornon cedex(France). INRA, UMR 1332 Physiologie et Biotechnologie végétales) | Gaudillère , Monique (INRA , VILLENAVE D'ORNON CEDEX (France). UMR 1332 UMR INRA / Univ. Bordeaux 1 / Univ. Bordeaux 2 : Biologie du Fruit et Pathologie) | Poêssel , Jean-Luc (INRA , VILLENAVE D'ORNON CEDEX (France). UMR 1332 UMR INRA / Univ. Bordeaux 1 / Univ. Bordeaux 2 : Biologie du Fruit et Pathologie)
Integrated production of fruit and vegetable species is one major field of research at Avignon INRA centre. Breeding for durable resistance to the green peach aphid, Myzus persicae (Sulzer) and other enemies of peach crop (Prunus persica L. Batsch) has been initiated fifteen years ago. Several sources of resistance are available among wild and domesticated peaches. Because all resistance genitors used in these programmes are of poor agronomic value, improvement of fruit quality is a long-lasting process. In order to avoid the erosion of the level of plant resistance during this process, the detailed analysis of the underlying mechanisms was undertaken. Here, we present some aspects of the work carried out on the genetic and physiological mechanisms of peach resistance to M. persicae. In addition to the analysis of the plant-aphid interaction under the influence of plant genetic factors, the effects of technical operations, such as winter pruning or nitrogen fertilization, on the aphid population dynamics are being investigated. Varietal resistance combined to cultural practices can be considered as an ultimate strategy to increase the efficacy of aphid control in orchards.
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