EFS12- Book of abstracts - Contact
EFS12- Book of abstracts - Contact
EFS12- Book of abstracts - Contact
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KEYNOTE LECTURE 1 SESSION 4: GENETICS OF HOSTS – PLANT<br />
RESISTANCE TO FUSARIUM, VARIETY DEVELOPMENT<br />
Resistance improvement <strong>of</strong> wheat to Fusarium head<br />
blight: challenges and possibilities<br />
H. Buerstmayr, M. Buerstmayr, W. Schweiger, B. Steiner<br />
BOKU - University <strong>of</strong> Natural Resources and Life Sciences Vienna, Department IFA-Tulln, Institute for<br />
Biotechnology in Plant Production, Konrad Lorenz Str. 20, A-3430 Tulln, Austria.<br />
E-mail: hermann.buerstmayr@boku.ac.at<br />
In the gene pool <strong>of</strong> bread wheat (Triticum aestivum) large variation for resistance<br />
to Fusarium head blight has been discovered, but strikingly less in current durum<br />
wheat (T. durum). Resistance to Fusarium head blight is a truly quantitative trait<br />
controlled by polygenes (QTL) and modulated by the environment. Numerous<br />
studies have been conducted to decipher the quantitative inheritance <strong>of</strong> Fusarium<br />
resistance in wheat mainly based on QTL mapping using segregating populations<br />
(Buerstmayr et al. 2009). With the advent <strong>of</strong> high-density genotyping tools<br />
association genomics and genome wide prediction approaches became<br />
practicable recently.<br />
Even in the era <strong>of</strong> genomics progress by selection depends heavily on accurate<br />
and powerful phenotyping. In a typical breeding situation large numbers <strong>of</strong><br />
experimental lines need to be tested for resistance response. Genotype-byenvironment<br />
interaction plays an important role in such trials and may result in low<br />
heritability. Therefore, measures need to be taken to obtain reliable resistance<br />
measurements, such as artificial inoculation, control <strong>of</strong> environmental conditions if<br />
feasible, and most importantly replication <strong>of</strong> trials within and across environments.<br />
In addition, it is not easy to separate active resistance responses from passive<br />
resistance due to plant morphological and/or developmental plant traits.<br />
We report here about: 1) successful application <strong>of</strong> large effect QTL in marker<br />
assisted bread wheat improvement; 2) identification and genetic analysis <strong>of</strong><br />
promising novel genetic resources for bread wheat and durum wheat breeding; 3)<br />
the association <strong>of</strong> morphological traits, especially plant height and the extent <strong>of</strong><br />
anther extrusion with FHB resistance. The implications for resistance breeding will<br />
be discussed.<br />
Acknowledgements: we acknowledge funding by the Austrian Science Fund<br />
(FWF), projects F3711 and TRP136-B16.<br />
Keywords Resistance genetics, phenotyping, trait associations, genomic assisted<br />
breeding<br />
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