Study of components of partial resistance to scab on a range of apple cultivars


  • Villette, I. , Lateur, M. , Lefrancq, B. & Lepoivre, P. (2004). Study of components of partial resistance to scab on a range of apple cultivars. Acta Horticulturae, 663: (1),
Type Journal Article
Year 2004
Title Study of components of partial resistance to scab on a range of apple cultivars
Journal Acta Horticulturae
Recnumber 52
Volume 663
Issue 1
Endnote Keywords apples|cultivars|disease resistance|fungal diseases|plant diseases|plant pathogenic fungi|plant pathogens|sporulation|
Abstract The objective of this work was to identify the main components of partial resistance to scab on a range of apple cultivars. Components which were studied, are: latent period, incidence, severity, mean sporulating area and area under disease progress curve (AUC). Each component depends on a particular mechanism of defence, hence, a better understanding of these will allow us to establish a better breeding strategy for a durable scab resistance. Furthermore these components have repercussions of epidemic importance in orchard, thus a cultivar's resistance components should be considered in the future scab management strategies. Each component has its own importance. A high correlation existed between the latent period and the area under the severity progress curve; secondly, in the greenhouse, the AUC of incidence or severity are very useful to observe and to judge the global effect of partial resistance. Finally, three groups of varieties were distinguished on the basis of the relationship between the global score in orchard conditions and the combination of areas under progress curves. As practical results of this work, the cultivars 'Alkmene', 'President Roulin', 'Reinette Hernaut', 'Grenadier' and 'Mosancelj' show the best low susceptibility to scab.
Notes Cited Reference Count: 13 ref. Journal article, Conference paper English
Author address Department of Biological Control and Plant Genetic Resources, Agricultural Research Centre, Gembloux, Belgium.
Lien ://20053077246
Authors Villette, I. , Lateur, M. , Lefrancq, B. & Lepoivre, P.