How lager yeasts came in from the cold, twice

“Yeast strains used today to brew lager have two genetic ancestors, not one as previously thought.

The discovery may explain the origins of the two major categories of lager today, described in the trade as the “Saaz” beers such as Pilsner and Budweiser, and the “Frohberg” beers such as Orangeboom and Heineken.”

Read the entire NewScientist.com news service artice here: How lager yeasts came in from the cold, twice