(This article was first published on Getting Genetics Done, and kindly contributed to R-bloggers)
The *ABEL suite of R packages and software for genetic analysis has grown substantially since the appearance of GenABEL and the previously mentioned ProbABEL R packages. There are now a handful of useful R packages and other software utilities facilitating genome-wide association studies, analysis of imputed data, meta-analysis, efficient data storage, prediction, parallelization, and mixed model
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Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).