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Genetic mapping of the powdery mildew resistance gene Pm7 on oat chromosome 5D

GND
117231098X
Affiliation
Julius Kühn-Institute (JKI), Institute for Breeding Research on Agricultural Crops, Germany ; Present Address: I.G. Saatzucht GmbH & Co KG, Germany
Brodführer, Sophie;
Affiliation
Bavarian State Research Center for Agriculture, Institute for Crop Science and Plant Breeding, Germany
Mohler, Volker;
Affiliation
Bavarian State Research Center for Agriculture, Institute for Crop Science and Plant Breeding, Germany
Stadlmeier, Melanie;
Affiliation
University of Life Sciences in Lublin, Institute of Plant Genetics, Breeding and Biotechnology, Poland
Okoń, Sylwia;
Affiliation
Nordsaat Saatzucht GmbH, Saatzucht Granskevitz, Germany
Beuch, Steffen;
Affiliation
Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Research Group Domestication Genomics, Germany
Mascher, Martin;
Affiliation
Agriculture and Agri‑Food Canada, Ottawa Research and Development Centre, Canada
Tinker, Nicholas A.;
Affiliation
Agriculture and Agri‑Food Canada, Ottawa Research and Development Centre, Canada
Bekele, Wubishet A.;
GND
121322327
Affiliation
Julius Kühn-Institute (JKI), Institute for Breeding Research on Agricultural Crops, Germany
Hackauf, Bernd;
GND
1059145979
ORCID
0000-0003-1760-6167
Affiliation
Julius Kühn-Institute (JKI), Institute for Breeding Research on Agricultural Crops, Germany
Herrmann, Matthias Heinrich

Resistance of oat to Blumeria graminis DC. f. sp. avenae is an important breeding goal in Central and Western Europe. In this study, the position of the effective and widely used resistance gene Pm7 in the oat genome was determined based on three independent experiments with different genetic backgrounds: genome-wide association mapping in a diverse set of inbred oat lines and binary phenotype mapping in two bi-parental populations. Powdery mildew resistance was assessed in the field as well as by detached leaf tests in the laboratory. Genotyping-by-sequencing was conducted to establish comprehensive genetic fingerprints for subsequent genetic mapping experiments. All three mapping approaches located the gene to the distal part of the long arm of chromosome 5D in the hexaploid oat genome sequences of OT3098 and ‘Sang.’ Markers from this region were homologous to a region of chromosome 2Ce of the C-genome species, Avena eriantha, the donor of Pm7, which appears to be the ancestral source of a translocated region on the hexaploid chromosome 5D.

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