Nachrichtenblatt des Deutschen Pflanzenschutzdienstes (2007) 59, 30-39

Rebecca Wächter, Franziska Waldow, Karl-Josef Müller, Hartmut Spieß, Bertold Heyden, Ursula Furth, Johann Frahm, Walter Weng, Thomas Miedaner, Dietrich Stephan and Eckhard Koch (2007)
Charakterisierung der Resistenz von Winterweizensorten and -zuchtlinien gegenüber Steinbrand (Tilletia tritici) and Zwergsteinbrand (T. controversa)
[Resistance of winter wheat varieties and breeding lines against common bunt (Tilletia tritici) and dwarf bunt (T. controversa)]
Nachrichtenblatt des Deutschen Pflanzenschutzdienstes 59 (2), 30-39
Abstract: The aim of the present study is to contribute to the topic of the use of varietal resistance against common bunt and dwarf bunt in organic farming. In the growing period 2002/03 field experiments were performed at five locations in Germany to determine the susceptibility against common bunt of 30 winter wheat varieties and breeding lines. In four of the five experiments the spores used for seed inoculation were of local origin, i. e. derived from the respective location. The maximum percentage of infected heads recorded at the five locations varied between 35 and 87%. Depending on the location, one to two thirds of the varieties had below 20% infection. Among the varieties with low infection were Magnifik, Stava, Tambor Tommi, Tarso and SW 51136. In the following year the experiments were repeated with the varieties Altos, Ataro, Korund, Tataros and Tommi. Under the generally higher disease pressure of the second year the cultivar Tommi was the only one with a similarly low percent infection as in the first year. In the field experiment for determination of susceptibility of the 30 varieties against dwarf bunt (tested at one location in 2002/03), one fourth of the varieties had below 2% infection, with a maximum infection of 16% in the susceptible reference variety Jubilar. The majority of these varieties were the same as those that had already shown reduced susceptibility towards common bunt. However, when the experiment was repeated in 2003/04, the selected varieties Ataro, Toronto, Tommi, Pegassos and Tarso had between 5 and 12 % infection (Jubilar: 30%).
Further, the virulence of five spore samples (isolates) of different geographical origin of T. tritici was analysed at one location using a standard set of differential -cultivars (GOATES, 1996). All isolates were, virulent for the resistance genes Bt 2 and Bt 7, but avirulent toards Bt 4, Bt 5, Bt 6, Bt 8, Bt 10, Bt 11, Bt 12, Bt 14 and PI 173437. The isolates could be differentiated by the plants carrying Bt 1, Bt 3, Bt 9, Bt 13 and Bt 15.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Database assignments for author(s): Dietrich Stephan, Eckhard Koch

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tilletia caries	Wheat (Triticum)	Germany
	Tilletia controversa	Wheat (Triticum)	Germany