Software to estimate selection coefficient of allele frequency clines across multiple loci

Question

[age00]

Hello,

I have RAD-seq allele frequency data at candidate loci under selection (~20 loci) for different populations (3 or 4) distributed along a latitudinal gradient.

My question: Is there software to estimate a selection coefficient on allele frequency clines based on ~20 loci using only allele frequency information, coordinates, and some knowledge of migration (e.g. dispersal distance of 800m)?

Any guidance is appreciated!