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| Klocke, Bettina; Flath, Kerstin; Schmitt, Anne-Kristin; Miedaner, Thomas; Schmiedchen, Brigitta; Spieß, Hartmut; Szabo, Lilla; Wilde, Peer. |
| Organic Agriculture is especially affected by the increasing spread of stem rust in rye (Puccinia graminis f. sp. secalis) because there is a lack of resistant cultivars in Germany. To analyze the virulence situation of rye stem rust, 71 single-pustule-isolates were established and 30 of those were tested with a differential set consisting of 19 lines. The isolates could be classified into 22 different pathotypes. Only seven pathotypes could be found more than once. Most of the isolates showed a complexity of five virulences. In a preliminary analysis a Simpson index of 0,98 was found indicating a high level of diversity of German stem rust populations. Nine of 19 tested lines reacted fully resistant in seedling stage. In 2011, 70 and 30 rye populations,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2013 |
URL: http://orgprints.org/21335/1/21335_Schmitt.pdf |
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| Wächter, Rebecca; Waldow, Franziska; Müller, Karl-Josef; Spieß, Hartmut; Heyden, Bertold; Furth, Ursula; Frahm, Johann; Weng, Walter; Miedaner, Thomas; Stephan, Dietrich; Koch, Dr. Eckhard. |
| Ziel der hier vorliegenden Untersuchung ist es, einen Beitrag zur Frage der Nutzung von Sortenresistenzen gegen Steinbrand und Zwergsteinbrand im Ökologischen Landbau zu leisten. Dafür wurden in der Vegetationsperiode 2002/03 an fünf Standorten in Deutschland Feldversuche zur Anfälligkeit von 30 Winterweizensorten und -zuchtlinien gegen Steinbrand durchgeführt. Für die Inokulation wurden (mit einer Ausnahme) Sporen vom jeweiligen Standort verwendet. Der an den fünf Standorten beobachtete Höchstbefall variierte zwischen 35 und 87 %. Abhängig vom Standort blieben unter diesen Bedingungen ein Drittel bis zwei Drittel der Sorten unter einem Befall von 20 %. Zu den Sorten mit geringem Befall zählten Magnifik, Stava, Tambor, Tommi und Tarso, sowie der Zuchtstamm... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2007 |
URL: http://orgprints.org/15093/1/Gedruckte_Version_27_Febr.07.pdf |
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| Flath, Kerstin; Schmitt, Anne-Kristin; Klocke, Bettina; Wilde, Peer; Schmiedchen, Brigitta; Miedaner, Thomas; Koch, Silvia; Spieß, Hartmut; Szabo, Lilla. |
| Der Ökologische Landbau (ÖLB) ist von der zunehmenden Ausbreitung des Roggenschwarz-rostes, Puccinia graminis f. sp. secalis, besonders betroffen, da resistente Roggensorten bisher nicht zur Verfügung stehen. Zur Analyse der Virulenzsituation des Roggenschwarzrostes wurden 389 Einpustelisolate (EPI) hergestellt, von denen 323 mit einem Differentialsortiment aus 15 Inzuchtlinien getestet wurden. Die EPI konnten 226 Pathotypen zugeordnet werden, von denen nur 56 Pathotypen häufiger als einmal vorkamen. Die Mehrzahl der Isolate wies in den Jahren 2011, 2012 und 2013 eine Komplexität von sieben, sechs bzw. fünf auf. Keine der 15 Differentiallinien reagierte vollständig resistent. Mit einem Simpson-Wert von 0,99 zeigt sich eine maximale Diversität der... |
| Tipo: Report |
Palavras-chave: Cereals; Pulses and oilseeds Biodiversity and ecosystem services Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2014 |
URL: http://orgprints.org/29300/1/29300-10OE077-10OE117-jki-flath-2014-roggenschwarzrost.pdf |
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| Miedaner, Thomas; Daume, Carola; Mirdita, Vilson; Schmiedchen, Brigitta; Geiger, Hartwig H.. |
| Rye as an outcrossing crop is highly susceptible to ergot infection caused by Claviceps purpurea. It is ecologically the best solution to avoid the infection already in the field by growing resistant varieties. Aim of our study is the analysis of inheritance of self-fertile rye material for ergot resistance and alcaloid content. Sixty CMS inbred lines and their 90 CMS crosses were tested in pollen-isolated fields in three environ-ments under the conditions of Ecological Farming by artificial inoculation. The sclerotia weight per head was evaluated as resistance trait. Both, CMS lines and testcrosses showed significant genotypic differences at the individual environments. Correlation between both groups was significant (r=0,6-0,7; P=0,01). The alcaloid... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2007 |
URL: http://orgprints.org/9419/1/9419_Miedaner_Vortrag.pdf |
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| Miedaner, Thomas; Merditaj, Vilson; Thiemt, Elisabeth; Hahn, Volker. |
| Breeding is an important tool to develop varieties with an optimal adaptation to organic farming. Several important traits are not covered by conventional research and breeding. At the State Plant Breeding Institute we are presently working on (1) resistance of rye to ergot (Claviceps purpurea), (2) nitrogen(N)-use efficiency in triticale, and (3) protein content of sunflower. The inheritance of these complex traits is quantitative. They are analysed in replicated field experiments at two locations in three years at several organic farms in Germany. For testing ergot resistance in rye, 68 populations, 250 full-sib families, 64 lines, and their 90 testcrosses were inoculated at mid-flowering by a spore suspension. All four material groups displayed... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation. |
| Ano: 2005 |
URL: http://orgprints.org/3809/1/3809.pdf |
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