I am interested how fast can the cluster membership change. I know it depends on the parental genotypes, but how strong this change could after one or more generations? Im working with Q-values from Structure software on Rousettus aegyptiacus population structure. It would be helpful if anybody could recommend some literature.
Thanks!
Could you be a bit more specific with your question? Do you mean how do membership probabilities change after several generations of admixture? Several generations of drift?
I have found that incorporating samples across long temporal periods can affect membership probabilities due to drift if populations are small. See the paper below.
https://doi.org/10.1111/mec.12109
A paper worth reading (linked below) illustrates that the time lag between an isolation barrier and detecting this pattern via genetic clustering methods (eg. STRUCTURE or TESS) can be as low as 15 generations for organisms with relatively large dispersal abilities. In other words, impacts to genetic clusters can be altered relatively quickly, which is especially pertinent to your study organism. Hope this helps.
Article Quantifying the lag time to detect barriers in landscape genetics
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