Schriften zu Genetischen Ressourcen - Genres

Fig. 1: Test sites for resistance evaluation across Germany
H.M. RIEMER and E. SCHLIEPHAKE
under Microsoft EXCEL to fill in the scorings and relevant pedigree and resistance
information are distributed to all partners together with the seed.
The evaluation methods are based on those formulated and already used (WALTHER
et al. 1996, http://barley.ipk-gatersleben.de/) and will be further refined. The methods
should be simultaneously applicable to several cereal diseases. A score of the percentage
of infected leaf or ear area, estimated on each occasion (one value per plot),
is preferred compared to the commonly used scoring system from 1 to 9. In contrast
to vertical resistance, for a rating of partial resistance, the extent and the development
of the infection need to be quantified. Therefore, the area under the disease
Disease severity [%]
100
80
60
40
20
0
average severity
Scoring period
Fig. 2: Area under the disease progress curve
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