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Euphytica

, Volume 154, Issue 1–2, pp 17–28 | Cite as

Effects of environment, disease progress, plant height and heading date on the detection of QTLs for resistance to Fusarium head blight in an European winter wheat cross

  • Anja Klahr
  • Gerhard Zimmermann
  • Gerhard Wenzel
  • Volker Mohler
Article

Abstract

In order to characterise quantitative trait loci (QTLs) for Type I and Type II resistance against Fusarium head blight (FHB) in wheat, a population of recombinant inbred lines derived from the cross Cansas (moderately resistant)/Ritmo (susceptible) was evaluated in spray-inoculated field trials over three seasons. Map-based QTL analysis across environments revealed seven QTLs on chromosomes 1BS, 1DS, 3B, 3DL, 5BL, 7BS and 7AL (QFhs.whs-1B, QFhs.whs-1D, QFhs.whs-3B, QFhs.whs-3D, QFhs.whs-5B, QFhs.whs-7A, QFhs.whs-7B) associated with FHB resistance. They accounted for 56% of the phenotypic variance. QFhs.whs-1D primarily appeared to be involved in resistance to fungal penetration, whereas the other QTLs mainly contributed to resistance to fungal spread. FHB resistance was significantly correlated with plant height (PH) and heading date (HD). Including all single environments, corresponding overlaps of QTLs for FHB resistance and QTLs for PH/HD occurred at six loci, among them two consistently detected QTLs, QFhs.whs-5B and QFhs.whs-7A. When significant effects of PH and HD on FHB resistance were eliminated by covariance analysis, a second QTL analysis revealed possible escape mechanisms for the majority of the coincidental loci.

Keywords

Fusarium head blight (FHB) QTL Resistance Wheat Plant height Heading date 

Notes

Acknowledgements

The work was funded by the Bavarian State Ministry of Agriculture. We thank Dr. L. Hartl, Dr. G. Backes and Dr. M. Herrmann for support in the statistical analyses as well as Sven Jahnsen for critically reading and Bob McIntosh for editing the manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Anja Klahr
    • 1
    • 3
  • Gerhard Zimmermann
    • 2
  • Gerhard Wenzel
    • 1
  • Volker Mohler
    • 1
  1. 1.Chair for Plant Breeding, Centre of Life and Food SciencesTechnical University MunichFreisingGermany
  2. 2.Institute of Agronomy and Plant BreedingBavarian State Research Center for AgricultureFreisingGermany
  3. 3.Ernst-Moritz-Arndt University Greifswald, Botanical InstituteGreifswaldGermany

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