Table 3. The effects of background selection on D. pseudoobscura autosomal and X chromosomal genes.

	Model 1	Model 2	Model 3	Model 4	Model 5
B values for autosomes
Effects of strongly selected sites	0.855	0.855	0.843	0.856	0.812
	0.859	0.859	0.843	0.865	0.800
Effects of weakly selected noncoding sites	0.914	0.914	0.929	0.891	0.941
	0.910	0.910	0.929	0.868	0.961
Effects of all sites	0.782	0.782	0.784	0.763	0.765
	0.782	0.782	0.784	0.751	0.769
B values for X chromosome
Effects of strongly selected sites	0.897	0.897	0.889	0.899	0.860
	0.898	0.898	0.889	0.900	0.864
Effects of weakly selected noncoding sites	0.940	0.940	0.950	0.922	0.960
	0.938	0.938	0.951	0.916	0.966
Effects of all sites	0.843	0.843	0.845	0.829	0.834
	0.843	0.843	0.845	0.825	0.835
Adjusted X/A diversity ratio for all sites	0.809	0.809	0.808	0.824	0.814
	0.809	0.809	0.808	0.823	0.814

See Table 1 for the meaning of the different models. The parameters are the same as for Table 2, except that map lengths of 1.2 and 1.3 M are assumed for A and X, respectively.