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| Registros recuperados: 1.409 | |
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| Borgen, Anders. |
| Common bunt (Tilletia caries) is one of the most devastating plant diseases, and a particular problem for organic seed production. Organic farming aims at controlling pests and diseases with the use of biodiversity and resistance. However most organic wheat fields today are sown with monocultures of pure line varieties, and resistance to common bunt is rarely used, even this disease causes severe problems for seed producers and for farm saved seed, as infected seed lots are discarded because of contamination with bunt spores. To improve the system, organic wheat needs resistance to common bunt that is effective enough to prevent development of the disease over time. For this reason several initiatives are ongoing to improve bunt resistance in organic... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2010 |
URL: http://orgprints.org/18943/4/18943.pdf |
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| Borgen, Anders. |
| Udsædsbårne sygdomme kan opdeles efter hvordan de smitter kornet. Nogle sygdomme (fx byg bladplet og stribesyge) inficerer kernerne, således at svampen er til stede inde i selve kernen allerede ved høst. Andre sygdomme kontaminerer såsæden med sklerotier (fx meldrøjer, Borgen 2005a) eller sporer (fx stinkbrand eller rugens stængelbrand, Borgen 2005b). Sygdommenes forskellige tilstedeværelse i såsæden har betydning for, hvilke renseprocesser, der kan anvendes til at reducere deres forekomst. Denne artikel handler om muligheden for at rense de sygdomme fra, som inficerer kernerne. En anden artikel i dette nummer af FØJO-enyt handler om stinkbrand. |
| Tipo: Journal paper |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2005 |
URL: http://orgprints.org/7944/1/7944.pdf |
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| Borgen, Anders. |
| All over the world, Thule III is used as differential variety for the resistance gene Bt-13 against common bunt. It can therefore be strange that I can question whether Thule III have Bt-13, so let me elaborate the question. I also use Thule III as a standard for Bt-13, and I got this variety from GRIN PI 181463. This variety does indeed have a major gene against common bunt and since we all use it as a standard for Bt-13 this gene is per definition Bt-13. What still puzzles me is that this variety does not look like Thule III. It says in the GRIN database that it is of Swedish origin with the pedigree Thule II/Sammet. PI 181463 is a short, lodging and weak variety with a very poor winter hardiness, and it does not at all look like a Swedish winter wheat.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2014 |
URL: http://orgprints.org/28140/7/28140.pdf |
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| Borgen, Anders. |
| Screening wheat varieties for resistance against common bunt is often done by adding a uniform sample of spores to a number of wheat varieties. The spore sample is often maintained on a susceptible variety from year to year. The problem with this design is that there are no replicates of the spore sample. It is therefore not possible to conclude what would be the result if a different spore sample was used. A simple way to improve this system is in the second year of experiments to test the varieties with low infection levels with both the spore sample, and in addition to that to use spores of the same variety from previous years trial. Often, the use of spores from the same variety will result in a higher infection level than using spores from other... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2014 |
URL: http://orgprints.org/28141/7/28141.pdf |
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| Borgen, Anders. |
| Der har i den danske landbrugspresse i sommeren 2008 været en debat om fordele og ulemper ved anvendelse af egen udsæd i forhold til anvendelse af certificeret udsæd. Landscenteret har eksempelvis beregnet, at konventionelle landmænd kan spare 265-350 kr/ha ved at bruge certificeret udsæd på 10% af markerne, og bruge egen såsæd på resten. Omvendt fremhæver såsædsbranchen for det første, at den danske model, hvor langt hovedparten af landmændene køber certificeret såsæd er med til at finansiere dansk planteforædling, og dermed til at vi har de bedste sorter, og for det andet et certificeret såsæd er af en bedre kvalitet bl.a. på grund af bejdsning. I økologisk landbrug er forholdene anderledes end i det konventionelle landbrug. |
| Tipo: Report chapter |
Palavras-chave: Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2008 |
URL: http://orgprints.org/27491/6/27491.pdf |
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| Borgen, Anders. |
| Organic farmers must use organic seed material if such seed are available. If not available, conventional seeds can be used. This request exists in all accredited standards for organic farming. In the EU-regulation on organic production methods, the derogation from the use of organic seed material will only exist until the end of 2003. After this date only organic seed material may be used according to the present formulation. Only a few countries in the EU have an organic seed production able to supply the market for organic seed material. It takes many years to develop a well functioning market for organic seeds. It is therefore unlikely that the derogation for the use of organic seed material will not be extended, since a majority of countries in the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2002 |
URL: http://orgprints.org/7947/1/7947.pdf |
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| Borgen, Anders. |
| Organic farmers must use organic seed material if such seed are available. If not available, conventional seeds can be used. This request exists in all accredited standards for organic farming. In the EU-regulation on organic production methods, the derogation from the use of organic seed material will only exist until the end of 2003. After this date only organic seed material may be used according to the present formulation. Only a few countries in the EU have an organic seed production able to supply the market for organic seed material. It takes many years to develop a well functioning market for organic seeds. It is therefore unlikely that the derogation for the use of organic seed material will not be extended, since a majority of countries in the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Values; Standards and certification Breeding; Genetics and propagation. |
| Ano: 2002 |
URL: http://orgprints.org/3200/1/3200.pdf |
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| Borgen, Anders. |
| Improved biodiversity is one of the key principles in organic farming and therefore organic plant breeding seeks alternatives to the currently dominant pureline monocultures. Evolutionary plant breeding of composite cross populations (CCPs) has been proposed as a breeding tool for organic plant breeding, where a highly heterogeneous population of offspring is made by mixing a large number of segregating lines from different parents (Döring et al. 2011). Natural selection will, to some extent, reduce traits onferring major disadvantages in a population if these have a high heritability and a significant impact on seed reproduction. It will not, however, necessarily improve baking quality, negative traits with a strong interaction with the environment or... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2013 |
URL: http://orgprints.org/34191/3/Birmingham2013_34191.pdf |
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| Borgen, Anders. |
| Modern society faces decreased biodiversity in nature caused by increased uniformity in agriculture, and health related problems with nutrition caused by industrialisation in food production. Conversion to organic farming increases biodiversity, because of diversification in crops and decreased intensity in control of weed and pests, and increase biochemical diversity within food products because of decreased nitrogen application in field. The author argues that the positive effects of in organic farming can be further improved by improved genetic diversity within the crop. Inter-cropping and variety mixtures are already used by some farmers, but diversity within the crop can be further improved by development of composite cross populations, composition... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2006 |
URL: http://orgprints.org/22136/13/22136.pdf |
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| Borgen, Anders; Backes, G.; Müller, Karl-Josef; Gallehr, Andrea; Scherrer, Bettina; Ytting, Nanna Karkov; Spieß, Hartmut. |
| 455 wheat varieties and breeding lines were grown in the field,contaminated with 7 to 11 different races of common bunt. Based on the reaction of the lines to the different virulence races, it was possible to group the lines by differential varieties with known resistance genes, indicating that they may have one or two of the resistance genes Bt1, Bt2, Bt5, Bt7, Bt13, BtZ or Quebon-resistance. Based hereof, genetic markers will be developed using a genome-wide association study (GWAS). |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2019 |
URL: http://orgprints.org/35425/1/06_13-16%20Borgen.pdf |
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| Borgen, Anders; Backes, Gunter; Müller, Karl-Josef; Spieß, Hartmut. |
| When assesssing races of common bunt for virulens pattern within a region, it is important to take into account that collected spores may represent a diverse population of different virulence races. When screening spores on a differential set of wheat lines with known resistance genes, a low infection rate on a resistant wheat variety does not necessarily demonstrate that virulence is absent in the spore collection, but could be a sign that virulence is present, but only present in a low frequency among the spores. If just a few spores within a spore sample are indeed virulent, they may infect some plants and from there multiply the virulence quite rapidly next years. Previous studies have shown that virulence against most resistance genes were present in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2018 |
URL: http://orgprints.org/34171/1/borgen-etal-2018-XX_Bunt_Proceedings.pdf |
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| Registros recuperados: 1.409 | |
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