The carrot (Daucus carota L.) is one of the best liked and is in addition the predominant vegetable grown in Switzerland. However, occurrence of bitterness is one of the main factors diminishing its popularity. The causative compound is isocoumarin a phenolic. Any kind of preharvest or postharvest stress may induce its synthesis and thus bitterness in carrots. Its biosynthesis occurs via the acetate-malonate pathway and not via the shikimate-pathway as common for phenolics. Consumer tests combined with sensory tests by trained panelists and chemical analysis showed that isocoumarin exceeding 10 mg/kg diminished eating quality. Carrots grown under optimal conditions and stored optimally contain trace amounts of isocoumarin and are characterized by sweet taste and absence of bitterness.
Tall oat grass and golden oat grass are typical hay-meadow grasses that are also suitable for forage mixtures. Of the four tall and three golden oat grass varieties tested, only one new variety of tall oat grass is likely to make it onto the List of Recommended Varieties.
Stevenel P., Wendling M., Brabant C., Suss H., Savoyat C., Dierauer H., Mascher F., Charles R.
FiBL and Agroscope investigated bread wheat varieties to determine their yield and quality stability. The results show that the choice of variety must be adapted to the site and that high yield potential does not go hand-in-hand with a high protein content.
Adapted and high-yielding varieties of forage plants are important for Switzerland as a grassland country. Hybrid ryegrass is a versatile forage grass that, thanks to breeding advances, has become even more persistent, disease-resistant and high-yielding over the past 30 years.