I used Beast to analyse COI sequence (741 bp) in a bat species, and the analysis clearly indicated that instead of one species, we had two different ones. I'd like to estimate the divergance date between these two genetic clades. I decided to use Beast. However, I have no fossil Datong information, so in BEAUti I fixed mean substitution rate to '1'. I received the tree with ages of nodes estimated in units: substitution per site (as stated in the manual). Is it possible to 'translate' this information into years, for example using the substitution rate for a particular gene?
Dear Colleague! Thanks vary much for your answer. That' s exactly what I was trying to do. So, if the age of the node was estimated on 0.0175 mutation units, assuming 2% substitution per site per million years, the divergence time is about 440 000 years? Sorry for this simple problems, but dealing with phylogenies is something new for me.
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