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Table 1 Deletions with skipping and blocking

From: A model for biased fractionation after whole genome duplication

Event i a -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 r
Start    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
1 -1 3 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1
    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
2    1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1
  -4 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
3 5 1 1 1 1 1 1 1 0 0 0 1 1 1 0 1 1 1 1,1
    1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
4 4 3 1 1 1 1 1 1 0 0 0 1 1 0 0 0 0 1 1,2
    1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
5    1 1 1 1 1 1 0 0 0 1 1 0 0 0 0 1 2
  -5 4 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 3
  1. Five deletion events affecting two homeologous chromosomes, leading to two runs of single-copy genes. The fourth step illustrates the "skip" process, at i = 5 where the pre-existing deletion is incorporated into a longer run with r = 2. The fifth step shows how further deletion (at i = -1) and the "skip" process (to i = 2) are blocked when a single-copy gene is encountered (i = -1) on the homeologous chromosome. This creates a single-copy run with length l = 7 and r = 3, part on one chromosome, part on the other. Note that r is not observable from the genome data.