Code for parallelizing R/qtlhot. See installed parallel directory for proper use. There is apparently an S3 parallel method, so doc has to be as shown below, even though it is called as parallel.qtlhot.
parallel.qtlhot(x, data = 1, ..., dirpath = ".")phase of parallel processing (1,2,3)
index for parallel processing (1,2,...)
additional arguments passed along
directory path as character string
Brian S Yandell and Elias Chaibub Neto
read.cross