Original Paper

Theoretical and Applied Genetics

, Volume 111, Issue 4, pp 747-756

First online:

Molecular mapping of Fusarium head blight resistance in the winter wheat population Dream/Lynx

  • M. SchmolkeAffiliated withInstitute for Crop Production and Plant Breeding, Bavarian State Research Center for Agriculture
  • , G. ZimmermannAffiliated withInstitute for Crop Production and Plant Breeding, Bavarian State Research Center for Agriculture
  • , H. BuerstmayrAffiliated withDepartment for Agrobiotechnology Tulln, University of Natural Resources and Applied Life Sciences
  • , G. SchweizerAffiliated withInstitute for Crop Production and Plant Breeding, Bavarian State Research Center for Agriculture
  • , T. MiedanerAffiliated withState Plant Breeding Institute, University of Hohenheim
  • , V. KorzunAffiliated withLochow-Petkus GmbH
  • , E. EbmeyerAffiliated withLochow-Petkus GmbH
  • , L. HartlAffiliated withInstitute for Crop Production and Plant Breeding, Bavarian State Research Center for Agriculture Email author 

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Abstract

Fusarium head blight (FHB), mainly caused by Fusarium graminearum and F. culmorum, can significantly reduce the grain quality of wheat (Triticum aestivum L.) due to mycotoxin contamination. The objective of this study was to identify quantitative trait loci (QTLs) for FHB resistance in a winter wheat population developed by crossing the resistant German cultivar Dream with the susceptible British cultivar Lynx. A total of 145 recombinant inbred lines (RILs) were evaluated following spray inoculation with a F. culmorum suspension in field trials in 2002 in four environments across Germany. Based on amplified fragment length polymorphism and simple sequence repeat marker data, a 1,734 cM linkage map was established assuming that the majority of the polymorphic parts of the genome were covered. The area under disease progress curve (AUDPC) was calculated based on the visually scored FHB symptoms. The population segregated quantitatively for FHB severity. Composite interval mapping analysis for means across the environments identified four FHB resistance QTLs on chromosomes 6AL, 1B, 2BL and 7BS. Individually the QTLs explained 19%, 12%, 11% and 21% of the phenotypic variance, respectively, and together accounted for 41%. The QTL alleles conferring resistance on 6AL, 2BL and 7BS originated from cv. Dream. The resistance QTL on chromosome 6AL partly overlapped with a QTL for plant height. The FHB resistance QTL on 7BS coincided with a QTL for heading date, but the additive effect on heading date was of minor importance. The resistance QTL on chromosome 1B was associated with the T1BL.1RS wheat-rye translocation of Lynx.