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How Lager Yeasts Came in from the Cold, Twice
New Scientist ^ | September 10, 2008 | Andy Coghlan

Posted on 09/18/2008 11:16:22 AM PDT by SunkenCiv

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. It turns out that both probably owe their origins to laws in 16th-century Bavaria that banned brewing in the summer because scorching heat ruined the ale that was brewed before the emergence of lager. Forced to produce their beer in the winter, brewers accidentally created conditions favouring the emergence of a hybrid yeast better suited to the cold. Researchers already knew that Saccharomyces pastorianus, now used to brew lager, is a hybrid produced through marriage between two yeast strains... The Group 1 yeasts, for example, were true hybrids, with one set of genes from each parent. The Group 2 yeasts had an extra copy of S. cerevisiae, making them "triploid" hybrids.

(Excerpt) Read more at newscientist.com ...


TOPICS: History; Science; Travel
KEYWORDS: ale; batf; beer; foodsupply; godsgravesglyphs; importantscience
Image and video hosting by TinyPic "You typical white grandma types just guzzle beer while you cling to your Bibles, clutch your guns, and discriminate against people not born in the United States."

1 posted on 09/18/2008 11:16:22 AM PDT by SunkenCiv
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To: StayAt HomeMother; Ernest_at_the_Beach; 1ofmanyfree; 21twelve; 24Karet; 2ndDivisionVet; 31R1O; ...

· join list or digest · view topics · view or post blog · bookmark · post a topic ·

 
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To all -- please ping me to other topics which are appropriate for the GGG list.
GGG managers are SunkenCiv, StayAt HomeMother, and Ernest_at_the_Beach
 

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2 posted on 09/18/2008 11:17:30 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_______Profile hasn't been updated since Friday, May 30, 2008)
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To: SunkenCiv

Is there a “Beer Ping List”? Seems like there ought to be . . . ;-)


3 posted on 09/18/2008 11:24:19 AM PDT by maryz
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To: SunkenCiv

Evolution at work to make better beer ping!


4 posted on 09/18/2008 11:24:40 AM PDT by allmendream (Sa-RAH! Sa-RAH! Sa-RAH! RAH RAH RAH! McCain/Palin2008)
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To: toddlintown

ping


5 posted on 09/18/2008 11:32:51 AM PDT by null and void (0bama: one year's experience. Biden: one year's experience, thirty times...)
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To: SunkenCiv

Interesting. I had never heard that the Rheinheitsgebot (sp)forbid brewing in the summer.


6 posted on 09/18/2008 1:12:11 PM PDT by doodad
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To: maryz

Add me please if you start one. Thanks


7 posted on 09/18/2008 1:13:10 PM PDT by petercooper (IQ tests for all voters!)
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To: GOP_Raider; maryz; petercooper

Beer List ping. Add 2 please


8 posted on 09/18/2008 6:08:22 PM PDT by Tainan (Talk is cheap. Silence is golden. All I got is brass...lotsa brass.)
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To: rzeznikj at stout; GOP_Raider; Rodney King; Tainan; Chasaway; SquirrelKing; dynachrome; ...

Beer Ping!

A low to medium ping list aimed at all of us who, well, love our beer…

FReepmail rzeznikj at stout or GOP_Raider to be added or struck from the list…

9 posted on 09/18/2008 6:16:14 PM PDT by GOP_Raider (If I wanted a Chicago politician as my President, I'd vote for Richard Daley)
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To: GOP_Raider

Quaffing Sam Adams last nite.


10 posted on 09/18/2008 6:20:16 PM PDT by dynachrome (Henry Bowman is right)
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To: SunkenCiv

So, is the first yeast strain still alive?


11 posted on 09/18/2008 6:32:34 PM PDT by alarm rider (Peace! through superior fire power....)
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To: allmendream
Evolution at work to make better beer ping!

I wonder; how many Creationists are tea toddlers?
12 posted on 09/18/2008 7:02:42 PM PDT by Caramelgal (a small-town mayor is sort of like a community organizer except that you have actual responsibilies)
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