Recombination Fraction Cutoff

Specify a recombination fraction cutoff to define clusters or linkage groups using the TREE Procedure of SAS/STAT. Depending on the Automated Linkage Group Clustering Method chosen ( Average , Complete , or Single ) this determines the number of linkage groups and group membership for markers. For Average , Complete , or Single linkage, groups are defined at the stage in clustering when the average, maximum, or minimum recombination between clusters is less than or equal to the specified cutoff, respectively.

Tip : In all methods, larger cutoff values correspond to a smaller number of linkage groups.

To Specify a Recombination Fraction Cutoff:

Specify Recombination Fraction Cutoff as the Define linkage groups based on the: option to activate this field.

Either type the desired value in the text field or move the slider to the right or to the left to change the value.

Tip : To change the scale of the slider, right-click on the slider and select Rescale Slider from the pop-up menu. Change the upper or lower boundaries in the window that appears, to rescale the slider and click OK .