The microbial strains that Agroscope uses for practical trials and which, if successful, subsequently become part of a defined mixed culture, must demonstrate a high level of safety. With this end in view, 186 strains of lactic acid bacteria from the Agroscope Culture Collection were tested for transferable antibiotic resistances, the formation of biogenic amines, and the presence of virulence factors. Only six strains had one or more transferable antibiotic resistances, and thus had to be ruled out. These strains were only isolated a few years ago. By contrast, the majority of strains from the Culture Collection were isolated several decades ago, at a time when resistances were probably not yet spread to such a large extent as they are today. The Culture Collection is also of inestimable value owing to its high biodiversity and the large number of strains it contains.
Soya-, cereal-, seed- or nut-based plant drinks are consumed increasingly frequently as milk substitutes. Agroscope researchers have studied the macro- and micronutrients in these drinks and have identified major differences between the plant drinks themselves as well as in comparison with milk.
Cheese varieties from Switzerland are characterised according to various criteria. Agroscope analysed the free volatile carboxylic acids in ten cheese varieties and demonstrated that the latter are suitable for characterisation and differentiation.
Spring J.-L., Reynard J.-S., Verdenal T., Zufferey V., Cléroux M., Dienes-Nagy Á., Bourdin G., Bieri S., Blouin A., Carlen C., Favre G.
Safeguarding the clonal diversity of Muscats in the Valais has enabled the characterisation of 42 Muscat à petits grains and 36 Moscato Giallo clones. The characteristics of the two are quite distinct, particularly their aromatic potential. The best clones will be included in the Swiss certification scheme.