QTLs for powdery mildew resistance in peach x Prunus davidiana crosses: consistency across generations and environments

Publication Overview
TitleQTLs for powdery mildew resistance in peach x Prunus davidiana crosses: consistency across generations and environments
AuthorsFoulongne M, Pascal T, Pfeiffer F, Kervella J
TypeJournal Article
Journal NameMolecular Breeding
Volume12
Issue1
Year2003
Page(s)33-50
CitationFoulongne M, Pascal T, Pfeiffer F, Kervella J. QTLs for powdery mildew resistance in peach x Prunus davidiana crosses: consistency across generations and environments. Molecular Breeding. 2003; 12(1):33-50.

Abstract

Powdery mildew, caused by Sphaerotheca pannosa var. persicae is one of the most important diseases in European peach orchards. Quantitative trait loci controlling powdery mildew resistance were detected using three related F1, F2 and BC2 populations derived from the cross between the resistant parent P. davidiana clone P1908 and the susceptible peach cultivar Summergrand. Powdery mildew resistance of each population was evaluated under natural exposure, in several locations and over several years. Thirteen QTLs were detected. For nine of them, the favourable allele came from the resistant parent. Five QTLs were consistently detected across the three populations. The F1 hybrid used to produce F2 and BC2 populations had not inherited the favourable allele from P1908 for QTL detected on LG3 and LG8 in F1 population. QTLs were not detected in the corresponding regions in F2 and BC2 populations. In two other genomic areas, significant substitution effects between P1908 alleles were evidenced in the F1 population, but the favourable allele came from Summergrand in the F2 and BC2 populations. Analysis of phenotypic data suggested an important qualitative change in the distribution of powdery mildew resistance after 1996, confirmed by QTL analysis. Indeed, a dramatic decrease of the effect of the major QTL previously detected on LG6 was observed after 1996, while the QTL on LG8 was increasingly involved in the control of powdery mildew resistance. Consequences for peach breeding strategies to improve powdery mildew resistance are discussed.
Features
This publication contains information about 54 features:
Feature NameUniquenameType
AC19AC19genetic_marker
resistance to powdery mildewqPMR.SP-ch1.1-SD402Not3QTL
resistance to powdery mildewqPMR.SP-ch1.1-SD402Not5QTL
resistance to powdery mildewqPMR.SP-ch1.2-SD402Not3QTL
resistance to powdery mildewqPMR.SP-ch1.2-SD402Not5QTL
resistance to powdery mildewqPMR.SP-ch1-BC2Not1QTL
resistance to powdery mildewqPMR.SP-ch1-BC2Not2QTL
resistance to powdery mildewqPMR.SP-ch1-BC2Not4bQTL
resistance to powdery mildewqPMR.SP-ch1-BC2Not9bQTL
resistance to powdery mildewqPMR.SP-ch1-SD402Not6QTL
resistance to powdery mildewqPMR.SP-ch1-SD402Not7QTL
resistance to powdery mildewqPMR.SP-ch1-SD402Not8QTL
resistance to powdery mildewqPMR.SP-ch1-SD402Not9aQTL
resistance to powdery mildewqPMR.SP-ch1-SD402Not9bQTL
resistance to powdery mildewqPMR.SP-ch1-SDNot1QTL
resistance to powdery mildewqPMR.SP-ch1-SDNot4bQTL
resistance to powdery mildewqPMR.SP-ch2-BC2Not4bQTL
resistance to powdery mildewqPMR.SP-ch2-SD402Not6QTL
resistance to powdery mildewqPMR.SP-ch2-SD402Not9aQTL
resistance to powdery mildewqPMR.SP-ch2-SDNot1QTL
resistance to powdery mildewqPMR.SP-ch4-BC2Not4bQTL
resistance to powdery mildewqPMR.SP-ch4-BC2Not8QTL
resistance to powdery mildewqPMR.SP-ch4-SD402Not3QTL
resistance to powdery mildewqPMR.SP-ch4-SD402Not5QTL
resistance to powdery mildewqPMR.SP-ch4-SD402Not6QTL

Pages

Featuremaps
This publication contains information about 3 maps:
Map Name
Peach-SP-F1-2003
Peach-SP-F2-2003
Peach-SP-BC2-2003