Estimate Sample Size for Population Genomic Studies R package castgen version 1.0.2 Estimate sample sizes needed to capture target levels of genetic diversity from a population (multivariate allele frequencies) for applications like germplasm conservation and breeding efforts. Compares bootstrap samples to a full population using linear regression, employing the R-squared value to represent the proportion of diversity captured. Iteratively increases sample size until a user-defined target R-squared is met. Offers a parallelized R implementation of a previously developed 'python' method. All ploidy levels are supported. For more details, see Sandercock et al. (2024) <doi:10.1073/pnas.2403505121>. Software Imports: doParallel (>= 1.0.17), dplyr (>= 1.1.2), foreach (>= 1.5.2), parallel (>= 4.0.0), Rdpack (>= 0.7), stats, utils, vcfR (>= 1.15.0) Suggests: testthat (>= 3.0.0) Alexander M. Sandercock <ams866@cornell.edu> Comprehensive R Archive Network (CRAN) Alexander M. Sandercock [aut, cre] (ORCID: <https://orcid.org/0000-0001-6897-1856>) Apache License (>= 2) 2025-04-02 application/tgz https://CRAN.R-project.org/package=castgen doi:10.32614/CRAN.package.castgen