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Mapping wheat powdery mildew resistance derived from Aegilops markgrafii

Published online by Cambridge University Press:  14 May 2012

Annette Weidner
Affiliation:
Saatzucht Bauer Biendorf GmbH & Co. KG, Kaiser-Otto-Straße 8, 06406 Bernburg (Saale), Germany Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466 Gatersleben, Germany
Marion S. Röder
Affiliation:
Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466 Gatersleben, Germany
Andreas Börner*
Affiliation:
Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466 Gatersleben, Germany
*
*Corresponding author. E-mail: boerner@ipk-gatersleben.de

Abstract

The pattern of inheritance of powdery mildew resistance expressed by two bread wheat (cultivar ‘Alcedo’)/Aegilops markgrafii introgression lines was explored using F2 populations bred from crosses made with the powdery mildew-susceptible cultivar ‘Kanzler’. Disease reaction was tested at both seedling and adult plant stages. Two resistance loci, designated QPm.ipk-1A and QPm.ipk-7A, were identified as mapping to the distal ends of chromosome arms 1AS and 7AL, respectively. Whereas QPm.ipk-1A was expressed throughout the plant's life, QPm.ipk-7A was only effective at the seedling stage. The map location of both resistance loci indicated that resistances originated from A. markgrafii. The possible genetic relationship of these disease-resistant genes to known Pm genes is discussed in the context of synteny.

Type
Short Communication
Copyright
Copyright © NIAB 2012

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