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

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

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 F(4:7) lines using restriction fragment length polymorphic (RFLP) markers. We evaluated 101 F(4:7) 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.

Original languageEnglish (US)
Pages (from-to)561-569
Number of pages9
JournalTheoretical and Applied Genetics
Volume99
Issue number3-4
DOIs
StatePublished - 1999

Keywords

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

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