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Influence of scab inoculum concentration in an apple breeding program focused on quantitative resistance


  • Lateur, M. , Lefrancq, B. & Wagemans, C. (2000). Influence of scab inoculum concentration in an apple breeding program focused on quantitative resistance. Acta Horticulturae, (No. 538 (Vol.1)),
Type Journal Article
Year 2000
Title Influence of scab inoculum concentration in an apple breeding program focused on quantitative resistance
Journal Acta Horticulturae
Recnumber 69
Issue No. 538 (Vol.1)
Endnote Keywords apples|plant pathogens|plant pathogenic fungi|plant diseases|disease resistance|varietal reactions|fungal diseases|quality|
Abstract Since 1988, thousands of hybrids with selected old cultivars emerging from our gene bank as parents are annually produced with the aim of selecting new commercial cultivars with low disease susceptibility. The objective is to create apple cultivars possessing durable disease resistance to scab (Venturia inaequalis), powdery mildew (Podosphaera leucotricha) and Nectria canker, combined with good fruit quality, high yield and long storage ability. One of the early steps of the selection process consists in testing the hybrid progenies for their resistance to scab. With the aim of standardizing the inoculation scab test conditions, the seedlings are quantitatively inoculated in a bench of original conception by spraying conidia suspended in distilled water. This equipment guaranteeing a very homogeneous distribution of the liquid, therefore the influence of scab inoculum concentration can be studied. A range of 5 concentrations (1500, 15000, 37500, 150000 and 300000 conidia/ml) have been applied to the progenies of several parents in open pollination. Results show that in these experimental conditions only the weakest concentration (1500 conidia/ml) provides significant differences in the expression of the susceptibility to scab.
Notes Cited Reference Count: 15 ref. Journal article, Conference paper English
Author address Department de Lutte Biologique & Ressources Phytogenetique, Centre de Recherche Agronomiques, Chemin de Liroux, 4, B, 5030 Gembloux, Belgium.
Fichier
Lien ://20003032234
Authors Lateur, M. , Lefrancq, B. & Wagemans, C.