Two research teams are mixing work and pleasure to assemble the first-ever genetic family tree of the yeasts used to make beer, and theyre pulling in data from over 2,000 brews. The New York Times recently visited yeast distributor White Labs, which is working alongside a genetics laboratory to complete the research. Thus far, the Times reports, theyve successfully sequenced the DNA for over 240 strains of brewing yeasts — including samples from mainstays like Sam Adams and Sierra Nevada. …