QTL mapping of fire blight resistance in Malus ×robusta 5 after inoculation with different strains of Erwinia amylovora

Publication Overview
TitleQTL mapping of fire blight resistance in Malus ×robusta 5 after inoculation with different strains of Erwinia amylovora
AuthorsWöhner TW, Flachowsky H, Richter K, Garcia-Libreros T, Trognitz F, Hanke M, Peil A
TypeJournal Article
Journal NameMolecular breeding
Volume34
Issue1
Year2014
Page(s)217-230
CitationWöhner TW, Flachowsky H, Richter K, Garcia-Libreros T, Trognitz F, Hanke M, Peil A. QTL mapping of fire blight resistance in Malus ×robusta 5 after inoculation with different strains of Erwinia amylovora. Molecular breeding. 2014; 34(1):217-230.

Abstract

Fire blight caused by Erwinia amylovora is one of the most disastrous diseases in apple production. Whereas most apple cultivars are susceptible to fire blight, several wild apple species accessions like Malus ×robusta 5 (Mr5) bear significant resistance. The resistance of Mr5 is mainly inherited by a major quantitative trait locus (QTL) on linkage group 3. QTL mapping was performed after inoculation of the population 04208 (Idared × Mr5) using strains differing in their virulence to Mr5. The QTL mapping approach demonstrated that the major QTL on linkage group 3 could be confirmed after inoculation with strains non-virulent to Mr5. In contrast, the major QTL disappeared after inoculation with strains virulent to Mr5. Only after inoculation with the resistance breaking strain Ea 3049 was a minor QTL with a LOD >3 found on linkage group 3. Additionally, several minor QTLs were detected on linkage groups 5, 7, 11 and 14 of Mr5 after inoculation with virulent strains able to overcome the major resistance QTL of Mr5. Their usefulness for further breeding activities will be discussed. The strain-specific results obtained in the present study provide further evidence for the existence of gene-for-gene relationships in the host–pathogen system Mr5–E. amylovora. Of the newly discovered minor QTLs, the one detected on LG7 contributes significantly to fire blight resistance in the presence of the major QTL, independently of the strain used.
Projects
This publication contains information about 1 projects:
Project NameDescription
Apple fire blight resistance trait-Peil-2014
Features
This publication contains information about 306 features:
Feature NameUniquenameType
PAGM48_380PAGM48_380genetic_marker
PAGM48_396PAGM48_396genetic_marker
PAGM48_77PAGM48_77genetic_marker
PAGM58_155PAGM58_155genetic_marker
PAGM58_160PAGM58_160genetic_marker
PAGM58_188PAGM58_188genetic_marker
PAGM58_248PAGM58_248genetic_marker
PAGM58_430PAGM58_430genetic_marker
PAGM58_460PAGM58_460genetic_marker
PAGM60_176PAGM60_176genetic_marker
PAGM60_194PAGM60_194genetic_marker
PAGM60_195PAGM60_195genetic_marker
PAGM60_260PAGM60_260genetic_marker
PAGM60_287PAGM60_287genetic_marker
PAGM60_292PAGM60_292genetic_marker
PAGM60_342PAGM60_342genetic_marker
PAGM60_392PAGM60_392genetic_marker
SdSSRSdSSRgenetic_marker
resistance to Erwinia amylovoraqREA.IM-Mr5-ch3QTL
resistance to Erwinia amylovoraqREA.IM-Mr5-ch5QTL
resistance to Erwinia amylovoraqREA.IM-Mr5-ch7QTL
resistance to Erwinia amylovoraqREA.IM-Mr5-ch11QTL
resistance to Erwinia amylovoraqREA.IM-Mr5-ch14QTL
resistance to Erwinia amylovoraqREA.IM-Mr5-ch5.2QTL
resistance to Erwinia amylovoraqREA.IM-Mr5-ch7.2QTL

Pages

Featuremaps
This publication contains information about 2 maps:
Map Name
Apple-IM-F1-Idared
Apple-IM-F1-Mr5
Cross References
This publication is also available in the following databases:
DatabaseAccession
AGL: USDA National Agricultural LibraryAGL:4825657