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Theoretical and Applied Genetics

, Volume 99, Issue 3–4, pp 561–569 | Cite as

Quantitative trait loci associated with resistance to Fusarium head blight and kernel discoloration in barley

  • R. C. de la Pena
  • K. P. Smith
  • F. Capettini
  • G. J. Muehlbauer
  • M. Gallo-Meagher
  • R. Dill-Macky
  • D. A. Somers
  • D. C. Rasmusson
Article

Abstract 

Resistance to Fusarium head blight (FHB), deoxynivalenol (DON) accumulation, and kernel discoloration (KD) in barley are difficult traits to introgress into elite varieties because current screening methods are laborious and disease levels are strongly influenced by environment. To improve breeding strategies directed toward enhancing these traits, we identified genomic regions containing quantitative trait loci (QTLs) associated with resistance to FHB, DON accumulation, and KD in a breeding population of F4:7 lines using restriction fragment length polymorphic (RFLP) markers. We evaluated 101 F4:7 lines, derived from a cross between the cultivar Chevron and an elite breeding line, M69, for each of the traits in three or four environments. We used 94 previously mapped RFLP markers to create a linkage map. Using composite interval mapping, we identified 10, 11, and 4 QTLs associated with resistance to FHB, DON accumulation, and KD, respectively. Markers flanking these QTLs should be useful for introgressing resistance to FHB, DON accumulation, and KD into elite barley cultivars.

Key words Fusarium head blight Scab Kernel discoloration Black point Kernel blight Deoxynivalenol (DON) RFLP Barley 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • R. C. de la Pena
    • 1
  • K. P. Smith
    • 1
  • F. Capettini
    • 1
  • G. J. Muehlbauer
    • 1
  • M. Gallo-Meagher
    • 1
  • R. Dill-Macky
    • 2
  • D. A. Somers
    • 1
  • D. C. Rasmusson
    • 1
  1. 1.Department of Agronomy and Plant GeneticsUniversity of MinnesotaXX
  2. 2.Department of Plant Pathology University of MinnesotaUS

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