PopGenome reads the GFF file distributed on the HapMap plattform only to verify the reference positions of the chromosomes.
In the next release, this function will also handle GFF/GTF files to get information about subsites (exons, introns, ...).
The input folder should include the files of different individuals for one chromosome. This facilitates FST calculations of the HapMap data.
See also readData("...", format="HapMap") which can read the files of single populations directly.