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 />
P89 - Identification <strong>of</strong> physiological traits in wheat<br />
conferring passive resistance to Fusarium head blight<br />
S. Jones, J. Foulkes, D. Sparkes, R. Ray<br />
University <strong>of</strong> Nottingham, School <strong>of</strong> Biosciences, Division <strong>of</strong> Plant and Crop Sciences, Sutton<br />
Bonington Campus, LE12 5RD, UK<br />
E-mail: sbxsj@nottingham.ac.uk<br />
Fusarium head blight (FHB), caused by a complex <strong>of</strong> Fusarium and Microdochium<br />
species, is a devastating fungal disease <strong>of</strong> cereals worldwide that leads to<br />
reductions <strong>of</strong> grain yield, quality and safety. Developing cultivars with improved<br />
FHB resistance is considered an essential step towards reducing the impact <strong>of</strong><br />
this disease.<br />
This study aimed to identify and quantify plant and ear traits in wheat conferring<br />
passive resistance to FHB through disease escape. Two field experiments were<br />
carried out in 2010 and 2011 using 5 UK winter wheat cultivars and 10 doubledhaploid<br />
lines derived from a cross between a spring wheat line <strong>of</strong> large-ear<br />
phenotype from CIMMYT, Mexico, and the UK winter wheat cultivar, Rialto. All 15<br />
wheat genotypes were ground inoculated at GS 30 using oat grains infected with<br />
a mixture <strong>of</strong> Fusarium graminearum, F. culmorum, F. avenaceum, F. langsethiae,<br />
F. poae, Microdochium majus and M. nivale. Plant and ear characteristics <strong>of</strong> the<br />
wheat genotypes were assessed at GS 65. Visual disease symptoms were scored<br />
at regular intervals from mid-anthesis onwards and used to calculate the area<br />
under the disease progress curve (AUDPC) for each wheat genotype.<br />
Multiple linear regression with groups was used to identify significant physiological<br />
traits related to AUDPC for the two seasons. Stem length, flag leaf length and ear<br />
length were the predominant plant characteristics which accounted for a<br />
significant (P