Figure 1.

An Illustration of the Procedure for Enumerating IBD Endpoints for Recombination Rate Estimation

In each iteration, IBD segments with short estimated cM length are filtered out to achieve the required level of IBD coverage in the target interval, which is delineated with vertical dashed lines. In this example, segments in light blue are filtered out and the three remaining IBD endpoints falling within the interval (marked by red stars) are counted as recombination events corresponding to this interval.