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QTL analysis of resistance to Fusarium head blight in Swiss winter wheat ( Triticum aestivum L.)

Paillard, S. ; Schnurbusch, T. ; Tiwari, R. ; Messmer, M. ; Winzeler, M. ; Keller, B. ; Schachermayr, G.

In: Theoretical and Applied Genetics, 2004, vol. 109, no. 2, p. 323-332

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    Titre
    • QTL analysis of resistance to Fusarium head blight in Swiss winter wheat ( Triticum aestivum L.)
    Auteur
    • Paillard, S.. Swiss Federal Research Station for Agroecology and Agriculture (FAL-Reckenholz), Reckenholzstrasse 191, 8046, Zurich, Switzerland
    • Schnurbusch, T.. Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland
    • Tiwari, R.. Directorate of Wheat Research, Karnal, 132 001, Haryana, India
    • Messmer, M.. Pharmaceutical Institute, University of Basel, Benkenstrasse 254, 4108, Witterswil, Switzerland
    • Winzeler, M.. Swiss Federal Research Station for Agroecology and Agriculture (FAL-Reckenholz), Reckenholzstrasse 191, 8046, Zurich, Switzerland
    • Keller, B.. Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland
    • Schachermayr, G.. Indo-Swiss Collaboration in Biotechnology (ISCB), Institute of Biotechnology, ETH-Hoenggerberg, 8093, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Theoretical and Applied Genetics, 2004, vol. 109, no. 2, p. 323-332. Springer-Verlag
    Autre version électronique
    Classification
    • Agriculture, Agronomie
    Identifiant OAI-PMH
    • oai:doc.rero.ch:315250
    Summary
    Fusarium head blight (FHB) of wheat is a widespread and destructive disease which occurs in humid and semi-humid areas. FHB epidemics can cause serious yield and quality losses under favorable climatic conditions, but the major concern is the contamination of grains with mycotoxins. Resistance to FHB is quantitatively inherited and greatly influenced by the environment. Its evaluation is costly and time-consuming. The genetic basis of FHB resistance has mainly been studied in spring wheat. The objective of this study was to map quantitative trait loci (QTLs) for resistance to FHB in a population of 240 recombinant inbred lines (RILs) derived from a cross between the two Swiss winter wheat cultivars Arina (resistant) and Forno (susceptible). The RILs were genotyped with microsatellite and RFLP markers. The resulting genetic map comprises 380 loci and spans 3,086cM. The 240 RILs were evaluated for resistance to FHB in six field trials over 3 years. Composite interval mapping (CIM) analyses carried out on FHB AUDPC (i.e. mean values across six environments) revealed eight QTLs which altogether explained 47% of the phenotypic variance. The three main QTLs were mapped on the long arms of chromosomes 6D (R 2=22%), 5B (R 2=14%) and 4A (R 2=10%). The QTL detected on 5B originated from the susceptible parent Forno. Other QTLs with smaller effects on FHB resistance were detected on chromosomes 2AL, 3AL, 3BL, 3DS and 5AL