Small polymorphisms are a source of ancestral bias in structural variant breakpoint placement

Table 1.

Summary of differential breakpoints in the merged callset

Insertions Deletions
Reference Repeat No. of variants Diff Diff % Med bp No. of variants Diff Diff % Med bp
GRCh38
No TR/SD 14,961 882 5.9% 2.2 5804 180 3.1% 4.9
SD no TR 2609 440 16.9% 3.5 1922 402 20.9% 5.0
All 60,716 19,589 32.3% 19.4 38,442 10,641 27.7% 22.0
T2T-CHM13
No TR/SD 15,180 888 5.8% 3.4 11,191 411 3.7% 3.7
SD no TR 1752 419 23.9% 4.5 2014 506 25.1% 14.0
All 46,862 12,833 27.4% 19.9 40,420 11,625 28.8% 24.6
  • Breakpoint differences increase in both GRCh38 and T2T-CHM13v2.0. (No TR/SD) SV is not anchored in TRs or SDs, (SD no TR) SV is anchored in SDs but not TRs, (All) all variants including those TRs and SDs, (Diff) number of variants with different offsets in at least one haplotype, (Diff %) mean percentage of variants with different offsets in at least one haplotype, and (Med bp) median number of bases variants with different locations are shifted.

This Article

  1. Genome Res. 34: 7-19

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