Select a method for joining clusters to form linkage groups via hierarchical clustering. Different algorithms might work better than others depending on your data.
The average distance (recombination rate) between pairs of markers from different clusters. The maximum distance (recombination rate) between a marker in one cluster and a marker in a different cluster. The minimum distance (recombination rate) between a marker in one cluster and a marker in a different cluster.See the CLUSTER Procedure documentation in SAS/STAT for more information.