Use this option to specify a LOD score value to use for further breaking groups.
If the LOD score between two ordered markers in a linkage group is less than this threshold, the group will be broken into two groups between those markers.
A marker with LOD score lesser than the specified value with both flanking markers will be put into a singleton group and dropped out of the analysis. Once a group of has been broken into multiple linkage groups, each new group will be re-run through the ordering process.