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  Topic: Genetic Surprise Confirms Neglected 70-Year-Old Ev< Next Oldest | Next Newest >  
Henry J



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Joined: Mar. 2005

(Permalink) Posted: Sep. 11 2006,08:32   

Genetic Surprise Confirms Neglected 70-Year-Old Evolutionary Theory
Quote
University of Rochester have discovered that an old and relatively unpopular theory about how a single species can split in two turns out to be accurate after all, and acting in nature.
[...]
The beginnings of speciation, suggests the paper, can be triggered by genes that change their locations in a genome. [...]


Henry

  
Ichthyic



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(Permalink) Posted: Sep. 11 2006,11:25   

Wait... so this is about the effects of translocation?

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"And the sea will grant each man new hope..."

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jeannot



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(Permalink) Posted: Sep. 11 2006,12:34   

This is a very particular case of speciation that can be assimilated to stasipatric speciation (maybe?). I don't think it's common.
Ans as I understand it, its doesn't not involve a complete reproductive isolation. I didn't read the paper though.

  
Henry J



Posts: 4565
Joined: Mar. 2005

(Permalink) Posted: Sep. 11 2006,12:51   

Re "so this is about the effects of translocation?"

Looks like an occasional side-effect of that to me (though I'm not a biologist, so I hope somebody'll correct that if I'm wrong).

Re "I don't think it's common."

So I gathered, since they've found evidence of other causes of speciation and hadn't really verified a case like this until now.

Henry

  
Ichthyic



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Joined: May 2006

(Permalink) Posted: Sep. 11 2006,13:09   

i guess the thing that irked me was the painting of translocations as potential mechanisms of speciation being "unpopular", when really, it was simply shelved until the technology caught up with theory.

I don't recall that translocation was ever singled out one way or the other when I studied molecular and population genetics.

Still, it is surprising that it took this long for somebody to document a good example.

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"And the sea will grant each man new hope..."

-CC

  
stevestory



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Joined: Oct. 2005

(Permalink) Posted: Sep. 11 2006,14:15   

It took that long because of the economics of DNA sequencing.

   
Ichthyic



Posts: 3325
Joined: May 2006

(Permalink) Posted: Sep. 11 2006,14:52   

you have a point there, but still, specific point mutations were identified as causal mechanisms before this.

I guess it's just a conflux of things that were required that finally came together.

--------------
"And the sea will grant each man new hope..."

-CC

  
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