Skip to main content
. 2017 May 16;49:46. doi: 10.1186/s12711-017-0321-6

Table 4.

Lengths of segments without switches of the trusted set of WGS SNPs for the two phasing strategiesa, whether correctly or wrongly phased or both (all)

WGS-P1 WGS-P2
All Correct Wrong All Correct Wrong
Original segments
 Physical lengthb
  Avg 3.01 2.96 3.07 3.19 6.11 84.99 kb
  Med 4.58 kb 4.75 kb 4.33 kb 3.38 kb 1.74 1 bp
  Max 150.73 150.73 123.75 116.39 116.39 42.76
 Proportion of singletonsc 37.52% 37.53% 37.51% 38.82% 12.18% 67.24%
 Number of phasable SNPs per segment
  Avg 1048.45 1041.75 1055.17 1098.05 2119.04 8.39
  Med 4 4 4 3 644 1
  Max 55,553 55,553 50,217 51,340 51,340 835
 Number of SNPs per segment
  Avg 6232.95 6134.89 6331.09 6612.58 12,639.78 179.99
  Med 12 13 12 8.5 3641 1
  Max 308,884 308,884 240,332 231,051 231,051 85,165
After discarding singletonsc
 Physical lengthb
  Avg 9.48 9.28 9.67 11.02 19.46 0.36
  Med 1.25 1.39 1.12 0.26 6.39 0.01
  Max 154.47 154.47 147.3 147.3 147.3 42.76
 Number of phasable SNPs per segment
  Avg 3185.72 3163.65 3207.84 3652.87 6524.06 28.54
  Med 367 418 314 59 2352 4
  Max 67,776 67,776 60,281 67,776 67,776 1452
 Number of SNPs per segment
  Avg 19,586.14 19,210.75 19,962.22 22,778.53 40,230.9 748.21
  Med 2555 2925.5 2306 523 13,713 15
  Max 318,618 318,618 304,742 304,742 304,742 85,165
After discarding segments with less than five phasable SNPs and shorter than 5 kb
 Physical lengthb
  Avg 14.78 14.46 15.11 19.36 31.64 0.72
  Med 4.62 4.72 4.51 2.28 19.59 0.06
  Max 158.12 158.1 158.12 158.24 158.24 42.76
 Number of phasable SNPs per segment
  Avg 4956.66 4911.73 5001.86 6400.99 10,581.41 53.68
  Med 1489 1584 1401 522 6580 13
  Max 73,348 73,348 60,625 67,776 67,776 1452
 Number of SNPs per segment
  Avg 30,549.61 29,916.85 31,186.28 40,033.57 65,412.51 1499.57
  Med 9884 10,364 9497.5 4913 41,646 138
  Max 327,738 327,706 327,738 327,914 327,914 85,165

A segment is defined as a run of consecutive phasable SNPs without switches

a WGS-P1 phased with LD information only, WGS-P2 phased with both LD and familial information

bUnless specified, all length units are in Mb

c“Singleton” refers to segments that contain only one SNP