TABLE 1

Analysis of polymorphic insertions (ins) and deletions (del) in noncoding DNA of D. melanogaster

IntronsIntergenic regions
naPDBbAv. size
 (SE)cAv. freq.
 (SE)d% ≤10
 bpenaPDBb Av. size
 (SE)cAv. freq.
 (SE)d% ≤10
 bpe
Nonrepetitive:
 del 622.008.94
 (1.13)0.244
 (0.033)0.7326g2.1710.00
 (1.19)0.219
 (0.044)0.56
DNA indels:
 ins 31f(1.06–2.05)6.32
 (1.54)0.354
 (0.047)0.8112(0.62–2.38) 5.33
 (2.09)0.421
 (0.103)0.83
Wilcoxon test
 Z−2.1220.304 −2.8230.274
 P0.0340.761 0.0050.784
All indels
 del1080.926.06
 (0.60)0.268
 (0.024)0.8341g0.69 6.83
 (1.00)0.248
 (0.038)0.71
 ins118f(0.62–1.91)3.33
 (0.58)0.382
 (0.027)0.9459(0.52–1.72) 3.10
 (0.52)0.483
 (0.040)0.95
Wilcoxon test
 Z2.988−1.515 2.975−2.779
 P0.0030.130 0.0030.005
  • a Number of polymorphic events.

  • b Polymorphic deletion bias, ratio between the number of observed deletions and insertions. The minimum and maximum values observed per fragment are given in parentheses. Note that these were calculated only when at least one insertion and one deletion were available.

  • c Average size in base pairs; standard error is given in parentheses.

  • d Average frequency of the indel event; standard error is given in parentheses.

  • e Fraction of indels ≤10 bp.

  • f One insertion of 132 bp was excluded.

  • g One deletion of 113 bp was excluded.