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FST calculation gives negative result

FST calculation gives negative result - Biology Forum

FST calculation gives negative result - Biology Forums. Ask questions and discuss the study of Biology. If you have Biology questions from your homework ask them here!


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Old 12-18-2008, 04:02 PM
Pipette Filler
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Default FST calculation gives negative result



I'm trying to calculate FST using the Cockerham & Weir formula, which is significantly more complicated than the standard FST formula given by Wright, but much more accuarte and widely used today. But I keep getting negative results. The results should only range between 0 and 1. Here's a typical example:

[attachment was shrunk and is unreadable; can the moderator allow me to post the link to the image?]

In the above example the populations are identical (which simplifies some of the math), but if I change them and make them a little different it still gives me negative results.

Thanks for any help.
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Last edited by argiedude; 12-18-2008 at 04:05 PM.
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