TABLE 6

Shared polymorphisms and fixed differences

sim and secsim and mausec and mau
LocusSharedFixedSharedFixedSharedFixed
Adh0 (0.00)71 (0.09)40 (0.00)14
ase0 (0)20 (0)10 (0)3
ci0 (0)50 (0.00)60 (0)4
est60 (0)2311 (1.63)40 (0)27
hb0 (0)01 (0.26)00 (0)2
In(2L)t8 (1.01)09 (1.94)05 (1.59)0
In(2L)ta0 (0.18)119 (1.94)00 (0.26)10
janusNANA11 (0.89)0NANA
mt:ND50 (0.00)80 (0)80 (0)12
per1 (0.12)1811 (1.39)30 (0.01)21
Sxl0 (0.07)11 (0.14)00 (0.03)5
w0 (0.19)10 (0.29)00 (0.03)4
yp20 (0.00)40 (0.01)20 (0.00)6
z0 (0)40 (0.17)10 (0)10
Zw0 (0)150 (0.08)60 (0)9
  • Shared polymorphisms are those DNA base positions in which two species share two or more segregating bases. Fixed differences are those positions where all the sequences from one species are different from all those of the second species. Observed values are shown for each of the three two-species contrasts. Values in parentheses are the expected number of shared polymorphisms calculated using expression (2) in the text. An expected value of (0) arises if one or both species have no polymorphic sites. NA, not applicable.

  • a Two sets of values are shown for In(2L)t. The upper values are based on inclusion of all three D. sechellia sequences, while the lower value is based on just those two that do not resemble D. simulans (see text).