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Interpretation of episodic diversifying selection (BSR) results (Read 3089 times)
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Curious HyPhy user

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Interpretation of episodic diversifying selection (BSR) results
Sep 20th, 2013 at 8:19am
 
Hello,

I did a branch site REL analysis from datamonkey and had the following results:
Found 1 branches under episodic diversifying selection at p<0.05
Branch A (A is the name of one of my species)
Corrected p-value 0.002
w+ 10,000.00
Pr[w=w+] 0.00, Pr the proportion of sites inferred to be evolving at w+ along this branch.
I need help in understanding while Pr is zero when there is evidence of episodic diversifying selection on the branch.  I expected Pr>0 since there are sites under positive selection according to the results.
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Sergei
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Re: Interpretation of episodic diversifying selection (BSR) results
Reply #1 - Sep 25th, 2013 at 11:04am
 
Hi there,

Pr[w=w+] = 0.00 up to two digits of precision (i.e. it is not exactly zero). If you look at the CSV results file from the analysis, you will have access to more decimal places.

Sergeo
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Curious HyPhy user

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Re: Interpretation of episodic diversifying selection (BSR) results
Reply #2 - Sep 26th, 2013 at 9:24am
 
Hello Sergei,

Thanks for the clarification.
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