TABLE 3

χ2 values under either random drift (selective neutrality) or linear directional change for the four D. subobscura experimental populations

Nf = 250Nf = 1500
Drift modelLinear modelDrift modelLinear model
Population cageχ2d.f.χ2d.f.χ2 deviationd.f.χ2d.f.C2d.f.χ2 deviationd.f.
A143.87916.52127.35881.79943.30138.488
A286.081037.00149.089192.0910125.00167.099
B2139.591136.671102.9310247.861198.671149.1810
B266.861328.20138.6512142.751386.65156.1012
  • Two different effective population sizes, Nf, have been assumed: 250 and 1500 females, respectively. All values are statistically significant (P < 0.01).