The program "structure" installed in BCRC
I have recently installed the command-line version of structure which "implements a model-based clustering method for inferring population structure using genotype data consisting of unlinked markers." The program is on your PATH if you open a terminal window and type "structure". To run the program, you really need the "mainparams" and "extraparams" files -- the original ones are in /usr/local/share/structure, if you need to start with something.
I have also set up the workstations to run structure in an automated way, if you have many analyses you want to run -- contact me to get directions on how to use that. Or if there are similar analyses you would like to run using the BCRC computers.