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An Effective Filter for IBD Detection in Large Data Sets

Figure 2

Sliding window along a chromosome.

When processing a query genome, we consider a window with size cM in each step, where is less than the target IBD block length . The indexed individuals that do not exhibit opposite homozygous SNPs with respect to the query in this window define the set of candidate individuals that may be IBD with the query around this window. In the subsequent iteration, the window moves along the chromosome by .

Figure 2