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| Registros recuperados: 114 | |
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| Lorenz, Norbert; Klause, Stefan; Spieß, Hartmut. |
| Because of the interdiction of chemical seed treatment, smut resistance is a main demand for cultivation of winter barley in organic farming. A comparison of common high yielding varieties with those chosen particularly with regard to good smut-resistance or tolerance showed no significant differences in field performance under the conditions of organic farming. Main criteria were the yield of grain and the content of protein and most important amino acids for animal nutrition (Cystine, Lysine, Me-thionine, Threonine, Tryptophan). Besides this the degree of shading weeds was estimated by means of measuring leaf areas and lengths of stalks. The leaf area proved to be the main factor. The availability of smut resistant or tolerant varieties out of organic... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation. |
| Ano: 2007 |
URL: http://orgprints.org/9466/1/9466_Lorenz_Vortrag.pdf |
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| Pinnschmidt, H.O.; Hovmøller, M.S.; Østergård, H.. |
| The resistance of spring barley varieties to powdery mildew, leaf rust, leaf scald and net blotch was characterized by using results from inoculated small-plot nurseries and larger survey plots subject to natural infection. The experiments were conducted in different environments. Both trial types often yielded complementary results with respect to the ranking of varieties suggesting that a recommended variety characterization should include both naturally infected survey-type trials and nursery trials in which the most relevant pathogen isolates and/or isolate mixtures or populations are used for inoculation. Average and median values of the diseased leaf area of a variety were highly correlated with each other and with the genotype main effect determined... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation. |
| Ano: 2006 |
URL: http://orgprints.org/8203/1/8203.pdf |
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| Hovmøller, M.S.; Pinnschmidt, H.; Willas, J.; Østergård, H.. |
| Disease assessment is the basis for describing disease resistance characteristics of commercial varieties in national variety lists for all crops where disease is considered a problem. It is well known that ‘disease’ in a specific situation depends on a whole range of interacting hosts, pathogens and environmental conditions. However, the biological complexity conflicts with the wish to express disease resistance characteristics of a variety as a single score per disease. This problem will be illustrated by basic dynamics of growth and senescence of both host and pathogen over time. Disease expressed in terms of absolute diseased leaf area, disease relative to total leaf area or green leaf area will be discussed in general. Two particular problems in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation. |
| Ano: 2005 |
URL: http://orgprints.org/8229/1/8229.pdf |
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| Acikgoz, Prof. Dr. Nazimi; Ilker, Dr. Emre. |
| Increasing trend in organic farming does not seem to have yet attracted the attention of many plant breeders. On the other side, in every cropping system, for every species, best performing cultivars are needed in each macro-ecology. Considering dif-ferent cropping systems, such as open or glasshouse production, main or second crop alternatives, plant breeders have to focus on the genotype-environment and genotype-input interactions. Organic farming is in need of tailor-made genotypes for almost every crop. In fact, in the near future the same amount of organic registered cultivars will be needed as the conventional cultivars. Conducting an immediate single or combined “seed-bed – pot – field test” might be a logical start to de-termine organic... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation Farm nutrient management. |
| Ano: 2006 |
URL: http://orgprints.org/7892/1/paper6.doc |
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| Description The objective of this research project is to collate and disseminate information relating to the performance of varieties under organic conditions and to facilitate the use of a knowledge transfer centre by producers and seed suppliers. The website will list all vegetable and cereal varieties available as organic seed and include performance data in organic and non-organic conditions where this is available. The research will collate and disseminate published data on variety performance under UK conditions as well as making the latest variety trials data carried out in the UK rapidly and easilly available for organic producers. It will also group varieties that have similar performance characteristics together for key crops. This will... |
| Tipo: Project description |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation Technology transfer. |
| Ano: 2023 |
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| Timmermans, B.G.H; Osman, A.M.. |
| Infection of wheat seeds with Fusarium spp. causes seedling blight. As a result of this disease, fields sown with infected seeds show a reduced plant density. This is especially a problem in organic agriculture, for which currently no practical seed disinfection methods are available. In the present project we investigated whether spring wheat cultivars differ in sensitivity to seedling blight, whether the possible differences could be linked to cultivar differences in early growth rates, and what size the delay in canopy closure resulting from the plant reductions was. Six spring wheat cultivars (Melon, Lavett, SW Kungsjet, Epos, Pasteur, Thasos), containing three infection levels (averages 5, 15 and 27%) of Fusarium culmorum were obtained and were sown... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation. |
| Ano: 2007 |
URL: http://orgprints.org/9751/1/timmermans%2Dosman%2D2007%2Dspring%2Dwheat.pdf |
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| Timmermans, Dr. B.G.H.; Osman, Ir. A.M.. |
| Fusarium spp. present on spring wheat seeds can infect seedlings and cause reduced plant densities and higher wheat infestations. In the current project, variation between commercially available spring wheat cultivars in their tolerance to Fusarium seedling blight was investigated in a pot and a field trail. Additionally, initial growth rates of cultivars were measured to investigate possible relations with tolerance. Preliminary analysis shows presence of tolerance differences between the spring wheat cultivars in the pot and field experiment. This difference was relatively robust (experiment x cultivar interaction was not significant). Preliminary analysis also showed a relation between tolerance and initial growth rates of cultivars in the field... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation. |
| Ano: 2008 |
URL: http://orgprints.org/11945/1/seedlingblightsofar2008aobt.doc |
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| Horneburg, Dr. Bernd; Becker, Prof. Heiko. |
| Does regional organic screening and breeding make sense? To answer this question we looked for experimental evidence in an organic outdoor tomato project. Potentially suitable varieties were collected, genotype x environment interactions were investiga-ted and selection was carried out within three crosses at three farms in Central and Northern Germany. The resulting selections were compared at all farms. Screening within organic horticulture was the most important means of finding suitable varieties. After three years of evaluation, 71% of the 18 most successful varieties came from colleagues within organic horticulture. The analysis of the regional evaluation did not reveal strong interactions of varieties and locations. The rate of Phytophthora (late... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation Vegetables. |
| Ano: 2008 |
URL: http://orgprints.org/11812/2/Hornbeburg_11812_ed.doc |
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| Registros recuperados: 114 | |
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