CALONNEC, Agnes; WIEDEMANN-MERDINOGLU, Sabine; DELIERE, Laurent; CARTOLARO, Philippe; SCHNEIDER, Christophe Joseph; DELMOTTE, François

doi:10.1111/j.1365-3059.2012.02667.x

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

CALONNEC, Agnes
Santé et agroécologie du vignoble [UMR SAVE]

WIEDEMANN-MERDINOGLU, Sabine
Santé de la vigne et qualité du vin [SVQV]

DELIERE, Laurent
Santé et agroécologie du vignoble [UMR SAVE]

Langue

Article de revue

Ce document a été publié dans

Plant Pathology. 2013, vol. 62, n° 3, p. 533-544

Wiley

Résumé en anglais

This study was designed to assess the reliability of grapevine leaf bioassays for predicting disease resistance on fruit in the field. The efficacy of various grapevine quantitative trait loci (QTLs) for conferring resistance to downy and powdery mildew was evaluated in bioassays and in a 2-year field experiment for downy mildew. The resistance genes studied were inherited from Muscadinia rotundifolia (Rpv1 and Run1) and from American Vitis species through cv. Regent (QTLRgP and QTLRgD). In bioassays, genotypes carrying Run1 blocked powdery mildew development at early stages. Genotypes combining Run1 with QTLRgP displayed no greater level of resistance. For downy mildew, genotypes carrying Rpv1 and/or QTLRgD were more resistant than the susceptible cv. Merlot, and showed a high level of leaf resistance in the field (<10% severity). Disease levels on bunches were much higher than those on leaves, with a high variability between Rpv1 genotypes (148%). A Bayesian decision theory framework predicted that an OIV-452 threshold of 5 in leaf bioassays allowed accurate selection of grapevine genotypes (P=0 center dot 83) with satisfactory disease severity on bunches. Therefore, this study validates that the use of early bioassays on leaves, as currently performed by grapevine breeders, ensures a satisfactory level of resistance to downy mildew of bunches in the field.< Réduire

Mots clés

perennial plant

Plasmopara viticola

Mots clés en anglais

Erysiphe necator

marker-assisted selection

receiver operating characteristic

Métadonnées

Partager cette publication !

Licence d’utilisation du document

The reliability of leaf bioassays for predicting disease resistance on fruit: a case study on grapevine resistance to downy and powdery mildew

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés

Mots clés en anglais

URI

DOI

Origine

Unités de recherche