Table 1. Estimates of the features of recombination from the pattern of decline of Δ with physical distance between sites, derived from genomic sequences of single individuals of vertebrates (File S1).

Species	θ	θ′	ρ1	x	$\overline{L}$
Primates
Gorilla gorilla	0.0031	0.0031	0.00057	0.067	3792
Macaca mulatta	0.0026	0.0149	0.00218	0.018	1068
Pan troglodytes	0.0010	0.0024	0.00033	0.177	4286
Pongo abelii	0.0053	0.0036	0.00062	0.043	5662
P. pygmaeus	0.0027	0.0047	0.00064	0.069	6852
Homo sapiens (Archaic Denisovan)	0.0004	0.0051	0.00022	0.235	3208
H. sapiens (African)	0.0036	0.0018	0.00064	0.066	1970
H. sapiens (Chinese)	0.0016	0.0039	0.00015	0.216	1833
H. sapiens (Watson)	0.0010	0.0161	0.00146	0.168	1389
Nonprimate mammals:
Ailuropoda melanoleuca	0.0013	0.0018	0.00023	0.250	16267
Canis familiaris	0.0009	0.0082	0.00503	0.020	1183
Loxodonta africana	0.0013	0.0221	0.00286	0.021	1084
Ornithorhynchus anatinus	0.0013	0.1709	0.28970	0.025	608
Nonmammalian vertebrates:
Anolis carolinensis	0.0026	0.0094	0.00214	0.058	1927
Fugu rubripes	0.0032	0.0042	0.00128	0.025	7238
Petromyzon marinus	0.0044	0.0061	0.00118	0.052	2863

θ′, an inferred estimate of 4N_eu from the fit to Equation 8, not necessarily equivalent to the independently derived ML estimate given as θ); ρ₁ = 4N_ec, where c is the recombination rate between adjacent sites; x, the fraction of recombination events leading to crossovers; and $\overline{L}$, the mean conversion-tract length (in base pairs).