It seems that that particular species of yeast does not appear in Europe. Only its hybrids do. So while it is possible that the yeast first traveled to Argentina, and then became extinct in Europe, it seems more likely that it originated at the place where it still can be found.
Maybe the conquistadors brought it WITH them (Score:4, Interesting)
Their best bet is that centuries ago, S. eubayanus somehow found its way to Europe
How do they know it wasn't the other way around? Maybe we Europeans brought it as a gift to our New World brothers.
Re:Maybe the conquistadors brought it WITH them (Score:3)
It seems that that particular species of yeast does not appear in Europe. Only its hybrids do. So while it is possible that the yeast first traveled to Argentina, and then became extinct in Europe, it seems more likely that it originated at the place where it still can be found.