To cite the rrBLUP package in publications use:

Endelman, J.B. 2011. Ridge regression and other kernels for genomic selection with R package rrBLUP. Plant Genome 4:250-255.

Corresponding BibTeX entry:

  @Article{,
    title = {Ridge regression and other kernels for genomic selection
      with R package rrBLUP},
    author = {J. B. Endelman},
    journal = {Plant Genome},
    year = {2011},
    volume = {4},
    pages = {250-255},
  }