In:
Journal of Plant Pathology, Springer Science and Business Media LLC
Abstract:
Malus × robusta 5, which has been the subject of extensive fire blight resistance research over time, is highly resistant or susceptible to the fire blight-causative bacterial pathogen, Erwinia amylovora – depending on the strain. M . × robusta 5 has been crossed with susceptible apple cultivars and rootstocks, and inoculated with several E . amylovora strains in order to study the genetics and mechanism of its fire blight resistance and susceptibility. A strong resistance QTL was first mapped on linkage group 3 (LG3) of M . × robusta 5 using an F1 progeny derived from a cross with the apple cultivar ‘Idared’ in Germany. This QTL was confirmed in two other F1 populations derived from crossing M . × robusta 5 with the rootstock ‘Malling 9’ in New Zealand, and with ‘Ottawa 3’ in the USA. A second QTL on LG7 was detected in the ‘Idared’ × M . × robusta 5 population but only with strains that break the LG3 QTL. However, in the US population of ‘Ottawa 3’ × M . × robusta 5, the LG7 QTL was detected regardless of strain-specificity, unlike in the New Zealand population of ‘Malling 9’ × M . × robusta 5 where the LG7 QTL was not also detected. Here, we report the detection of the LG7 QTL in a different ‘Malling 9’ × M . × robusta 5 population in Germany, and confirm the independence of the LG7 locus to E. amylovora strains.
Type of Medium:
Online Resource
ISSN:
2239-7264
DOI:
10.1007/s42161-023-01458-2
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2212051-8
