It's what's inside that counts: DNA-barcoding of porcini (Boletus sp., Basidiomycota) commercial products reveals product mislabelling

In the edible mushroom market, porcini (Boletus edulis Bull., and related species) are a very economically valuable product, with 20–100 tons of these mushrooms being sold each year worldwide. However, products sold as “Boletus edulis” are often a mix of different species, some of them of less value than “Boletus edulis” but sold at the same price. DNA-Barcoding is a powerful tool that can help uncover this kind of fraud in a rapid and accurate way.