Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

Updated selection methodology for FHB resistance for SEJET

A range of winter wheat varieties and lines, 111 in total, which were described as moderately to highly resistant (together with few susceptible checks) has been characterized for Fusarium head blight (FHB) in replicated experiments for 3 years.

The lines were tested using artificial inoculation with maize stubble distributed over the trial area in autumn, and by applying a spore suspension of Fusarium approximately three times during anthesis. Before and after inoculation with spore suspension the trial was kept moist by a mist irrigation system running for a few minutes 2-4 times a day during the inoculation period, around anthesis. For a period of about two weeks after anthesis, the mist irrigation was turned on in the morning and evening to extend the moist period during the night.

The evaluation for FHB was performed 2-3 times with a few days in between, from the beginning of symptom appearance until the more susceptible lines were fully diseases. The disease severity was assessed on a 0-9 scale were 0 is resistant and 9 susceptible, this scale corresponds to 0 to 100 % coverage of the ear with disease symptoms. Overall the inoculation system worked very reliably and good disease evaluation was made in two out of three years. One year disease failed to develop before natural senescence probably due to unusually cold conditions during anthesis.

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