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SESSION 4: GENETICS OF HOSTS – PLANT RESISTANCE TO FUSARIUM,
VARIETY DEVELOPMENT
Meta-analysis of resistance to Fusarium head blight
among tetraploid wheat genetic resources –
implications for resistance breeding of durum wheat
M. Buerstmayr, H. Buerstmayr
BOKU-University of Natural Resources and Life Sciences, Department for Agrobiotechnology Tulln,
Institute for Biotechnology in Plant Production, Konrad Lorenz Str. 20, A-3430 Tulln, Austria
E-mail: hermann.buerstmayr@boku.ac.at
Improvement of resistance to Fusarium head blight (FHB) is a continuous and
currently unsolved challenge for durum wheat breeders. The main problem is the
small genetic variation for FHB resistance within Triticum durum, almost all lines
are susceptible. Therefore, several groups attempted introgression and genetic
mapping of resistance from landraces or related species of durum wheat, such as
T. dicoccum, T. dicoccoides, T. carthlicum, and T. aestivum in order to integrate
FHB resistance alleles into modern macaroni wheat cultivars. In this report we
compare QTL positions and effects found in three own populations (Gladysz et al.
Isr J of Plant Sci 2007, Buerstmayr et al. TAG 2012) with four reports published
by other groups in tetraploid wheat (Ghavami et al. G3 2011, Otto et al. Plant Mol
Biol 2002, Ruan et al. Genome 2012, Somers et al. Genome 2006) and with QTL
reported from bread wheat (Buerstmayr et al. Plant Breed. 2009). This
comparison highlights that in relatives of durum wheat resistance improving
alleles are present and can be introduced into durum wheat and that most QTL
reported in tetraploid wheat were also found in hexaploid wheat, indicating that
the genetics of FHB resistance in tetraploid wheat and hexaploid wheat largely
overlaps. Based on these recent results, FHB resistance breeding by allele
introgression into durum wheat seems readily feasible.
Keywords: Fusarium head blight, resistance, drurum wheat, meta-analysis
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