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Zwieback0
Baby Bread


Registered: 08/23/02
Posts: 3,473
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Resistant to heat over time?
#5855198 - 07/13/06 04:18 PM (17 years, 6 months ago) |
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My friend has been fruiting cakes and casings for a long time in his 80 - 90 degree room. He has been using the same strain over and over, printing each new generation and using it to grow another batch.
Considering fruiting temp is recommended at 70ish degrees, how is it possible that he is getting lushful flushes each time despite the high temps? Is it possible the strain has adapted to the temp difference over the generations of growing?
Just curious.
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Zwieback0
Baby Bread


Registered: 08/23/02
Posts: 3,473
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Re: Resistant to heat over time? [Re: Zwieback0]
#5855617 - 07/13/06 06:48 PM (17 years, 6 months ago) |
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?
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fastfred
Old Hand



Registered: 05/17/04
Posts: 6,899
Loc: Dark side of the moon
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Re: Resistant to heat over time? [Re: Zwieback0]
#5856049 - 07/13/06 09:01 PM (17 years, 6 months ago) |
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Sure. If there is sufficient variation in the initial germplasm then you can effectively select substrains that like your conditions. Assuming this variation, you can get better substrains each generation through recombination.
-FF
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RogerRabbit
Bans for Pleasure


Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: Resistant to heat over time? [Re: fastfred]
#5856111 - 07/13/06 09:22 PM (17 years, 6 months ago) |
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Cubes have a very wide tolerance for fruiting temperatures. I've seen them fruit well from the 50's through the mid 90's. I've even seen them flush like crazy when the fruiting temperatures were ten degrees warmer than the colonization temperature. I doubt a few generations would change the genetics. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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Tomandjerry58
Stranger
Registered: 01/27/03
Posts: 5,212
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Re: Resistant to heat over time? [Re: RogerRabbit]
#5856146 - 07/13/06 09:35 PM (17 years, 6 months ago) |
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i see we are having fun this summer?
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fastfred
Old Hand



Registered: 05/17/04
Posts: 6,899
Loc: Dark side of the moon
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Re: Resistant to heat over time? [Re: Tomandjerry58]
#5856591 - 07/14/06 12:11 AM (17 years, 6 months ago) |
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> I doubt a few generations would change the genetics.
Any genetics that produce a detectable phenotype can be easily selected for or weeded out within a few generations.
Any gene that exhibits simple mendelian inheritance and is dominant can be eliminated or selected for in just one generation.
Any phenotype that is likely a polygenic trait, like temperature sensitivity, is more complex, but it is not unreasonable to expect that you can produce a measurable change in your populations genetics in a few generations.
Look up "the breeders equation". Simply put, your average phenotype will change in porportion to the selection coefficient that you apply to the population.
-FF
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