Mapping QTL involved in adult plant resistance to powdery mildew in the winter wheat line RE714 in two susceptible genetic backgrounds |
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| Authors: | D Mingeot N Chantret P V Baret A Dekeyser N Boukhatem P Sourdille G Doussinault J M Jacquemin |
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| Institution: | Département de Biotechnologie, Centre de Recherches agronomiques, 234 Chaussée de Charleroi, B-5030 Gembloux, Belgium. E-mail:;INRA, Station d'Amélioration des Plantes, Domaine de la Motte, BP29, F-35653 Le Rheu. France;Unitéde Génétique, Universitécatholique de Louvain, Place Croix du Sud 2 bte 14, B-1348 Louvain-la-Neuve, Belgium;Département de Lutte biologique et Resources phytogénétiques, Centre de Recherches agronomiques, 4 rue de Liroux, B-5030 Gembloux, Belgium;INRA, Station d'Amélioration des Plantes, Domaine de Crouelle, 234 Avenue du Brézet, F-63039 Clermont-Ferrand Cedex 2, France |
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| Abstract: | The objective was to study the genetic basis of adult plant resistance to powdery mildew of the winter wheat line RE714 by quantitative trait loci (QTL) analysis and to investigate the stability of the QTL detected in two different genetic backgrounds. Two DH populations from the crosses between RE714 and the susceptible parents ‘Festin’ and ‘Hardi’ were used. Reaction of the DH lines to powdery mildew was assessed in different environments in Belgium under natural disease infection. Considering both populations and according to the environment tested, one to seven QTL were detected. Among them, residual effects of the race‐specific resistance genes Pm4b and MIRE were found. Two major QTL were very stable (on chromosome 5D and at the MIRE locus), since they were detected in both populations and over all environments tested. The QTL detected varied according to the susceptible parent used, and a residual effect at the Pm4b gene was not observed with the genetic background of ‘Hardi’. |
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| Keywords: | Triticum aestivum adult plant resistance mapping powdery mildew QTL |
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