EFS12- Book of abstracts - Contact
EFS12- Book of abstracts - Contact
EFS12- Book of abstracts - Contact
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SESSION 4: GENETICS OF HOSTS – PLANT RESISTANCE TO FUSARIUM,<br />
VARIETY DEVELOPMENT<br />
Progress in breeding FHB-resistant winter wheat in<br />
Ontario, Canada<br />
L. Tamburic-Ilincic<br />
University <strong>of</strong> Guelph, Ridgetown Campus, 120 Main St. E. Ridgetown, Ontario, N0P2C0, Canada<br />
E-mail: ltamburi@uoguelph.ca<br />
Fusarium head blight (FHB) is an important wheat disease. Selection for FHB<br />
resistance and lower deoxynivalenol (DON) content in the grain continue to be<br />
important goal for breeders worldwide. We have used exotic sources <strong>of</strong> FHB<br />
resistance and native sources from North America and developed germplasm with<br />
high level <strong>of</strong> FHB resistance and moderately resistant winter wheat cultivars<br />
adapted to Ontario. The most resistant germplasm from our program was tested<br />
in USA and Germany over years and had stable performance across all<br />
environments.<br />
A winter wheat population consisted <strong>of</strong> 147 RILs derived from a cross between<br />
‘RCATL33’ (resistance from ‘Sumai 3’ and ‘Frontana’) and ‘RC Strategy’ (a FHB<br />
susceptible, elite s<strong>of</strong>t red winter wheat) was developed to study the effect <strong>of</strong><br />
single major QTLs for FHB resistance (3B, 5A and 3A) on yield, agronomic and<br />
quality parameters. Lines in the 3B QTL class had the lowest FHB index, DON<br />
content and FDK level, headed early and did not have a significantly lower yield or<br />
protein content compared to the lines grouped in other QTL classes. Markerassisted<br />
selection (MAS), using SSR markers associated with the 3B QTL for<br />
FHB resistance, in high-yielding, FHB-susceptible Canadian s<strong>of</strong>t winter wheat is<br />
the recommended method for the development <strong>of</strong> lines with increased FHB<br />
resistance without significant yield and quality penalties.<br />
All wheat commercially grown in Ontario is entered in the Performance Trial and<br />
tested every year for FHB resistance and DON level in three nurseries inoculated<br />
with F. graminearum. Using all available data, each cultivar is assigned to a<br />
category that describes level <strong>of</strong> FHB resistance (highly susceptible-HS,<br />
susceptible-S, moderately susceptible-MS, and moderately resistant-MR) based<br />
on an index that combines both FHB symptoms and DON level. Results related to<br />
progress in winter wheat development in Ontario, with respect to FHB resistance,<br />
will be presented.<br />
Keywords: Fusarium, wheat, resistance<br />
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