Robert65
Major Obvious (recently promoted)
The dendrograph and other data in the papers are clearly stated only to include cerevisiae strains. It is noted that many yeasts used to make lager are unexpectedly found to be cerevisiae strains. Urquell H is cerevisiae. It is also true that all pastorianus contains genetic material from cerevisiae as it is hybrid, with some strains, apparently type Saaz, containing more than type Frohberg. But the conventional classifications of ale and lager yeasts, while phenotypically accurate, do not always align as expected with genomic classification. All that should matter to the practical brewer is phenotype.I'm afraid there is a fundamental misunderstanding here. WLP800 is not classified as an ale strain neither in the paper you linked to or in any other paper. What the document you linked to is telling us is that WLP800 has genetic affinities to several other strains. This however has nothing to do with its being either pastorianus or cerevisiae. Since the consesus is that pastorianus is the result of hybridsation of a cerevisiae strain it is not only possible but actually inevitable that WLP800 while being pastorianus will have a cerevisiae ancestor dating back to before the hybridisation event. Since the Urquell strain is allegedly the first pastorianus strain it's to be expected that it will have the greatest genetic affinity to current ale strains with which it might share that ancestor from before the hybridisation event.