Solid work there NB. I see as well the Gallone paper has WLP860 in the mix, but not sure if the sequence data is available , maybe they've released other data to see if that's a Saaz type as them all being Frohberg is pretty unexpected...
For those who don't know what sykesey is referring to, the Ghent/Leuven groups published
their long-awaited paper on this stuff in the same edition of Nature E&E. They looked particularly closely at the loss of phenolic capability in lager yeasts, which requires losing POF-ness from both the cerevisiae and eubayanus genomes. Saaz yeasts have lost that bit of the cerevisiae genome altogether, but Frohbergs have the same 1bp insertion that disables ferulic acid decarboxylase (FDC1) in other Beer1 strains, suggesting that the cerevisiae that made the hybrid was already POF- before the hybridisation event. But the eubayanus genome lost the bit with the cluster in three different ways, so they now divide the Saaz group into two subgroups, which happen to each contain a different one of Hansen's original isolates at Carlsberg. :
Both groups have done their own version of Suregork's family tree in their Supplementary Information :
Langdon et al
https://www.nature.com/articles/s41559-019-0998-8#Sec22
Gallone et al 2019 :
https://www.nature.com/articles/s41559-019-0998-8#Sec22
The Saaz are really obvious on this, and no, there's no commercial homebrew yeast in the Saaz group on the Gallone paper, at least they've unblinded some of the White Lab yeasts (Chris White is listed as an author) :
WLP051, WLP515, WLP802, WLP810, WLP815, WLP820, WLP833, WLP835, WLP840, WLP845, WLP850, WLP855, WLP856, WLP860, WLP862, WLP920, WLP925, WLP940, WLP070 Kentucky Bourbon
So no WLP800 or WLP838 listed among the lager yeast....
I wonder if Vin7 is POF+ or POF- ? Maybe worth some experimentation for thiols, maybe a job for a lab made hybrid of Kudriavzevii & Cerevisiae, use something like WLP644 that's POF-, or an interesting strain like WY1318 / LAIII / Conan deriv. Or just add Rapidase, ß-lyase enzyme.
VIN7 is
weakly POF+ and killer sensitive.
Did a bit of a search on NRRL and it lists the source of Y-1906 and co as "Wiles, Exch. Brewery, Sheffield, England". Could be the Tennant Brothers Exchange Brewery?
Hmm - I'm sure I've encountered that one before somewhere, now I think of it. It is indeed Tennants - AE Wiles worked in the lab there and published a couple of papers on contaminant yeasts after a lot of trouble in the summer of 1948. Y-1906 is his "
S.carlsbergensis" T102
in this paper. I'm not sure if this is the same yeast
he had designated "
S. carlsbergensis Yorkshire Haze Strain I" in 1949 - the granddaddy of haze yeasts!!!!!
Getting the yeast is not that hard as Urquell sells its beer unfiltered and unpasteurized in the Czech Republic mostly for events (but you get to sample it during the brewery tour too). The sequencing would be the hardest part though.
Urquell used to be made with 5 strains fermented separately, after the fall of the Iron Curtain they went down to one, which some people have suggested is the cerevisiae. But that's not incompatible with a given homebrew coming from "Urquell" at some point and being different to 4 other Urquell yeasts.