To cite the GWASpoly package in publications, please use

  Rosyara UR, De Jong WS, Douches DS, Endelman JB (2016) Software for
  genome-wide association studies in autopolyploids and its application
  to potato. Plant Genome 9, doi:10.3835/plantgenome2015.08.0073

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Software for genome-wide association studies in autopolyploids and its application to potato},
    author = {U. R. Rosyara and W. S. {De Jong} and D. S. Douches and J. B. Endelman},
    year = {2016},
    journal = {Plant Genome},
    volume = {9},
    pages = {doi:10.3835/plantgenome2015.08.0073},
  }