DOQTL object containing the LOD score and model coefficients.
stat.name
Character string containing the name of the mapping statistic.
sig.thr
Numeric matrix containing significance thresholds. Columns must be
labelled "A" and "X", in that order and should contain thresholed
produced by get.sig.thr().
sig.col
Colors to use when plotting the significance thresholds above. Must be the
same length as the nuber of rows in sig.thr.