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InvisibleThe Lightning
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How many mating types can occur from a single spore print?
    #18287455 - 05/19/13 11:44 AM (11 years, 2 days ago)

How many mating types can occur from a single spore print?

Please allow this discussion to develop and include advanced, intermediate, and even sub-intermediate discussion.

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Offlineperoporquemaria
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Re: How many mating types can occur from a single spore print? [Re: The Lightning]
    #18288940 - 05/19/13 05:53 PM (11 years, 2 days ago)

Basidiomycetes are nightmares for this kind of thing.  The tetrapolar behavior can result in thousands upon thousands of different mating types.  A single spore print can have millions of spores, so I'd imagine 'a lot' is a good estimate.

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Invisiblefastfred
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Re: How many mating types can occur from a single spore print? [Re: peroporquemaria]
    #18290100 - 05/19/13 10:20 PM (11 years, 2 days ago)

:facepalm:

There are four mating types in a tetraspore species.

A1B1
A1B2
A2B1
A2B2

When these mating types combine you can get non-fusion/incompatibility, two types of partial compatibility, or compatibility.





-FF

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Offlineperoporquemaria
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Re: How many mating types can occur from a single spore print? [Re: fastfred]
    #18292715 - 05/20/13 12:52 PM (11 years, 1 day ago)

:facepalm:
I'm retarded and talking about combinations.

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InvisibleThe Lightning
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Re: How many mating types can occur from a single spore print? [Re: peroporquemaria]
    #18292760 - 05/20/13 01:02 PM (11 years, 1 day ago)

No you're not. This stuff gets interesting and complicated. I'm glad someone joined in the learning process.

fastfred, can you tell me a little bit regarding how Schizophyllum commune became able to have 28,000 mating types?

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Invisiblefastfred
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Re: How many mating types can occur from a single spore print? [Re: The Lightning]
    #18292859 - 05/20/13 01:24 PM (11 years, 1 day ago)

Schizophyllum commune has multiple alleles at each of the two mating type loci.  Hundreds in fact.

They can maintain this (you would expect only 4 would be possible at two loci) because their mating types do not have incompatibility barriers.  So any mating type of myc can fuse to any other and the nuclei are trafficked around the mycelial network like a crazy pinball game.

Generally they will have thousands of spores in any given area and they all fuse back together making the nuclei that ends up in the resulting spores almost entirely random.

Mating types arose (think humans or any species) in order to force genetic diversity by splitting it up and forcing random combinations of genetic material.

I'm not really sure what advantage all these mating types give it, but it may just be a throwback or pure randomness with no real advantage.


-FF

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Offlinecubenpete
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Re: How many mating types can occur from a single spore print? [Re: fastfred]
    #18302436 - 05/22/13 06:16 AM (10 years, 11 months ago)

Quote:

fastfred said:


I'm not really sure what advantage all these mating types give it, but it may just be a throwback or pure randomness with no real advantage.


-FF




I suppose after the geologic period called the Carboniferous (resulting in the ample fossil fuels present today) fungi diversified greatly and has kept all of it's options open. For instance, it  literally took tens of millions of years of evolution to enable mycelium to decompose lignin (that is why the resource of coal accumulated). A continuous crap shoot of traits only helps to preserve viability in an ever changing environ. The sheer diversity of genetics within the Fifth Kingdom allow it to compete with virus, archaea, bacteria and resultant phages. I am not so sure other eukaryotes can claim the same elasticity in regards to environmental upheaval.

Basically two hyphae with archaic genomes may be all it takes to keep a basidiomycete alive and kicking. Sometimes to succeed a back to basics approach is warranted. Just think of those odds when it comes to spores numbering in the hundreds of thousands. Soul mates, if you will. Truly wondrous. 

Edited by cubenpete (05/22/13 07:02 AM)

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OfflineBjJiggles
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Re: How many mating types can occur from a single spore print? [Re: cubenpete]
    #18312454 - 05/24/13 12:37 AM (10 years, 11 months ago)

:takingnotes:


--------------------

Alan Rockefeller said:No!  Do not feed the type collection of a new species to animals!

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OfflineTerry M
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Re: How many mating types can occur from a single spore print? [Re: BjJiggles]
    #18316171 - 05/24/13 08:23 PM (10 years, 11 months ago)

My understanding is that a large number of mating types increase the percentage of compatible matings, and therefore the chances of survival and increased genetic diversity. A mating type cannot mate with one of its own type, but it can mate with any other type. So in a tetrapolar mushroom species, one type has a 75% chance of finding a compatible mating type, vs. only a 50% for a bipolar species, such as Coprinellus disseminatus.


--------------------
Liberté, égalité, humidité.

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OfflineNobitte
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Re: How many mating types can occur from a single spore print? [Re: Terry M]
    #18316412 - 05/24/13 09:34 PM (10 years, 11 months ago)

Thanks chaps, this has been everything I wanted to know about bifactorial mating but was too afraid to ask.


(I think I get it actually, but this came to mind)


--------------------
First we must learn...

Then... WE CAN TEACH :weirdeyes:

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Offlinecubenpete
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Re: How many mating types can occur from a single spore print? [Re: Nobitte]
    #18316718 - 05/24/13 11:11 PM (10 years, 11 months ago)

Ready for a thick read? Interesting but THICK..lmao.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1456265/

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InvisibleThe Lightning
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Re: How many mating types can occur from a single spore print? [Re: cubenpete]
    #18341987 - 05/30/13 05:34 AM (10 years, 11 months ago)

Question: Why do spore prints grown out on agar create division barriers?

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Invisiblefastfred
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Re: How many mating types can occur from a single spore print? [Re: The Lightning]
    #18342055 - 05/30/13 06:23 AM (10 years, 11 months ago)

> Question: Why do spore prints grown out on agar create division barriers?

Self vs. non-self recognition.

I think since most fungi breaks down plentiful decaying organic material, the best way is for them to compete is by acquiring resources and exploiting their niche.  There is probably usually little benefit to fighting another living organism that already possesses the resources for whatever meager scraps might remain by the time they would win.

Plants are usually kinda the same way.  They try to grow fast to get resources and squeeze others out, but most of them don't try to attack or actually grow into the other plants.

So it's probably easiest to just stop and focus your growth in another direction when you recognize that non-self has already occupied this other territory.  It's also not genetically advantageous to attack your siblings, so mating type mismatches can contribute to the line of inhibition.


-FF

Edited by fastfred (05/30/13 06:36 AM)

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OfflineBjJiggles
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Re: How many mating types can occur from a single spore print? [Re: fastfred]
    #18343007 - 05/30/13 11:47 AM (10 years, 11 months ago)

Very nice explanation FF!:thumbup:


--------------------

Alan Rockefeller said:No!  Do not feed the type collection of a new species to animals!

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