Einfluss des Ertragspotentials des Standorts und des Anbausystems auf den Züchtungserfolg bei Weizen in Deutschland

Baking quality is a major problem of wheat production in organic farming in Germany. The main reason is low protein content, but also different gluten characteristics. The aim of our investigations was to verify, whether selection of varieties with special adaptation to organic farming (or OF systems with particular low input) is advantageous. 66 Genotypes of winter wheat (registered German varieties, breeding lines, older varieties and varieties bred for organic farming) were compared in 5 environments over two years. Yield, protein content and quality parameters were assessed. Aptitude to LI- or HI- conditions was determined using intravarietal linear regression. While selection for special adaptation proved to be superior for yield and protein yield, this could not be confirmed for gluten characteristics

Anfälligkeit von Leguminosen gegenüber Meloidogyne hapla

Green manure legumes are a necessary element of organic crop rotations. However, they are able to propagate nematodes especially Meloidogyne and Paratylenchus species. The results of a pot experiment showed that plant species of the genera Pisum, Vicia, Trifolium had a higher propagation rate of Meloidogyne hapla than salad Latuca sativa while plant species of the genera Medicago and Melilotus were less susceptible to infestation of nematodes. It is concluded that crop rotation management especially in vegetable production has to consider the different susceptibility of the legumes and further research has to test more species and varieties