I have downloaded the .vcf.gz files from the 1000 Genomes FTP. I am trying to study the genetic variation within a subpopulation for a particular gene. I am a new user to plink and is not acquainted with all the functions. I have converted the .vcf files to .bed, .bid and .fam formats. But I am not sure if I the subpopulation IDs are present in the file or do I have to download the .ped files from the 1000 Genomes website. Any insight on obtaining the allelic variants for a subpopulation is appreciated.