adegenet
Adegenet was created by Thibaut Jombart and has been on CRAN since April, 2007. I was involved in the migration to version 2.0 in the summer of 2015, which included consolitading S4 methods and including the strata() methods. I have been maintaining the package by fixing bugs and responding to CRAN requests since 2020. Abstract Toolset for the exploration of genetic and genomic data. Adegenet provides formal (S4) classes for storing and handling various genetic data, including genetic markers with varying ploidy and hierarchical population structure (‘genind’ class), alleles counts by populations (‘genpop’), and genome-wide SNP data (‘genlight’).