TABLE 6

Polymorphism statistics of loci from the XR and XL breakpoints and the ST arrangement (third chromosome)

LocusSpeciesnaLbScSyndRepdEmbedded ImageeπfDgZnShDiffi
Vg (3)ST pseudoobscura15512.528100.016800.017520.18000.1650.05039
SC/TL bogotanaj4431.016000.020250.01856−0.84901.0
ST persimilis2518.01000.001930.001930.06687
miranda1564.0
X_2105 (XL)pseudoobscura6600.8280.020410.01809−0.71980.2090.03235
bogotana4604.020.001810.002211.89311.00.03483
persimilis6605.0110.007960.00639−1.19370.2830.02810
miranda1608.0
X_2102 (XR)pseudoobscura10541.41130.073780.05189k0.1200.07407
bogotana5664.020.001450.00181k0.4440.06248
persimilis5619.6180.013940.01243k0.2150.08092
SR persimilis6608.320.001440.00142k0.4000.07955
miranda1900.0
  • —, values could not be obtained for small samples or for groups of sequences with few informative sites.

  • a Number of lines sequenced.

  • b Average length (base pairs) of the sequences from each species.

  • c Number of polymorphic sites.

  • d Number of synonymous (syn) and replacement (rep) polymorphisms in the coding regions.

  • e Estimate of 4Nμ/bp using the number of polymorphic sites (Watterson 1975).

  • f Estimate of 4Nμ using the average number of nucleotide differences per site (Tajima 1983).

  • g Tajima's (1989) statistic. Significance was determined using 10,000 coalescent simulations with no recombination.

  • h Average intralocus linkage disequilibium (Kelly 1997). Significance was determined using 1000 coalescent simulations with no recombination.

  • i Average pairwise difference per base pair between alleles from each taxon and the alleles of D. miranda.

  • j The D. p. bogotana data presented here should not be used for comparison, as they do not bear the ST arrangement.

  • k Tajima's D not included because of possible complications arising from meiotic drive affecting this chromosome arm in D. persimilis.