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| Messmer, Monika M.; Burger, Henriette; Schmidt, Walter; Geiger, Hartwig H.. |
| Organic farming systems, characterized by special attention to soil fertility, recycling techniques and low external inputs, gained increased significance in recent years. As a consequence, there is a growing demand for varieties adapted to organic and/or low input farming. The objectives of the present study were to (i) compare the testcross performance of segregating maize (Zea mays) populations under established organic (OF) and conventional farming (CF) systems, (ii) determine quantitative genetic parameters decisive for the selection response under OF vs CF conditions, and (iii) draw conclusions for breeding new varieties optimally adapted to OF. Testcross performance of four different material groups of preselected lines (90 lines per group) derived... |
| Tipo: Book chapter |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2010 |
URL: http://orgprints.org/17864/1/messmer%2Detal%2D2009%2Dtagung%2Dvereinigung%2Dpflanzenz%C3%BCchter%2Dsaatgutkaufleute%2D%C3%B6sterreichs.pdf |
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| Messmer, Monika; Burger, Henriette; Schmidt, Walter; Geiger, Hartwig H.. |
| Organic farming systems, characterized by special attention to soil fertility, recycling techniques and low external inputs, gained increased significance in recent years. As a consequence, there is a growing demand for varieties adapted to organic and/or low input farming. In several studies modern varieties as well as landraces have been tested for their suitability for organic farming (OF), whereas special breeding programs aiming at genotypes optimized for this farming system are scarce. Comparing the testcross performance of unselected recombinant inbred lines derived from the widely used US hybrid B73 x Mo17 under conventional (CF) and organic farming systems, Lorenzana and Bernardo (2008) concluded that high yielding maize hybrids for OF can be... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2009 |
URL: http://orgprints.org/19993/1/IFOAM_Messmer_paper__13_05_2009_NEW.pdf |
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| Burger, Henriette; Schmidt, Walter; Geiger, Hartwig H.. |
| Problemstellung: Der Ökologische Landbau hat in den letzten Jahren in Deutschland zugenommen. Die Versorgung mit Saatgut, das dafür geeignet ist, gewinnt deshalb verstärkt an Bedeutung. Die Ziele waren: Optimierung der Selektionsstrategie zur Entwicklung von Maissorten mit spezieller Anpassung an die Bedingungen des Ökologischen Landbaus; Entwicklung neuer Sorten (Populations- und Hybridsorten) für den Ökologischen Landbau; Erschließung genetischer Ressourcen für den Ökologischen Landbau, insbesondere aus Landsorten, die auf Low-Input-Eignung vorgeprüft wurden. Durchführung: In den Jahren 2004 bis 2006 wurde die Leistung von Testkreuzungen, Experimentalhybriden und neu entwickelten Populationssorten vergleichend unter ökologischen und konventionellen... |
| Tipo: Report |
Palavras-chave: Breeding; Genetics and propagation Root crops. |
| Ano: 2006 |
URL: http://orgprints.org/16714/1/16714%2D03OE651%2Dkws%2Dburger%2D2006%2Dmaissorten.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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