8th INTERNATIONAL WHEAT CONFERENCE

ReSISTANCe To fuSARIum heAd BLIghT IN SPRINg
WheAT VARIeTIeS
Jana Chrpova 1 , Václav Sip 1 , Lenka Stockova 1 ,
Ondrej Veskrna 2 , Karla Rehorova 2 , Pavel Horcicka 2
1 Crop Research Institute, Drnovska 507, 161 06 Praha 6 – Ruzyne, Czech Republic
2 Research Centre SELTON, Ltd., Stupice 24, 250 84 Sibrina, Czech Republic
E-mail Address of presenting author: chrpova@vurv.cz
Resistance to accumulation of mycotoxin deoxynivalenol (DON) in grain of 11 spring
wheat varieties recommended for cultivation in the Czech Republic was evaluated in field
trials lasting three years (2007, 2008, 2009) following artificial inoculation with Fusarium
culmorum. Data on DON content were supplemented by symptom scores and determination
of percentage of Fusarium damaged grains and percent reductions of thousand
grain weight and grain weight per spike due to infection. The conditions of experimental
years highly influenced performance of all characters. The highest production of DON
occurred in 2009 at high temperature and high moisture content during infection period.
Using multiple comparisons from ANOVA, the varieties could be arranged in each year
and over examined years into homogeneous groups of similar resistance level. Moderate
resistance to accumulation of DON was detected only in the variety Amaretto. However,
this variety did not reach the resistance level of the check variety Sumai 3. Close relationships
in all three years were detected between DON content and visual symptom score,
and between DON content and percentage of Fusarium damaged kernels. Significant and
positive correlations were also detected between DON content and reductions of thousand
grain weight and reductions of grain weight per spike. The obtained results could
help to improve classification of varieties from these aspects, which is desirable for recommendation
on their use in practice and breeding.
Combining FHB resistance with resistance to other diseases, yielding ability and quality
traits undoubtedly represents a serious problem. Tests of resistance to FHB in breeding
programmes of SELGEN company usually start in generation F6 after selection for suitable
plant types, grain quality characters and screening for resistance to the other important
diseases (rusts). F6 lines are also tested for resistance to brown leaf spot diseases. Until
now Czech breeders have succeeded in combining different desirable traits with moderate
resistance to FHB, which was recently detected in spring wheat advanced lines of SELGEN
company that originate from the crosses SWEDJET*SUNBIRD, VELOS*SWEDJET*SG-
S54-01, LEGUAN/2*ST95/41, ST14943*A464, SG-U705A*SG-U753D.
Supported by the Ministry of Agriculture of the Czech Republic, Projects No. QH 81293
and 0002700604
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