However, a few distinct strains were associated with beers that have very specific traits, such as the smoky clove - like flavor of German Hefeweizen beer. (sciencedaily.com)
The connection is the wheat, which is a trademark of Hefeweizen brews. (fortune.com)
The six strains used in the study are commonly known as cask and bottle conditioned beer yeast; California ale yeast; Hefeweizen ale yeast; Champagne yeast; American ale yeast and Pilsen lager yeast. (sciencedaily.com)