Table 1. Correlation coefficients among the studied variables: the level of neutral polymorphism (θ_neu), the level of normalized neutral polymorphism (P_neu = θ_neu/d_neu), recombination rate (RR), GC content (GC), the density of simple repeats (RD), the divergence at coding sites (D_n), the divergence at conserved noncoding region (D_x), the number of codons (FD_n), the number of conserved noncoding sites (FD_x), and the level of neutral divergence (d_neu).

	θneu	Pneu	RR	GC	RD	Dn	Dx	FDn	FDx	dneu
θneu	—	0.9364**	0.2187**	−0.2747**	−0.1046**	−0.2939**	−0.1655**	−0.3210**	−0.3094**	0.2868**
Pneu	0.7880**	—	0.1309**	−0.2460**	−0.1306**	−0.2467**	−0.1552**	−0.2363**	−0.2161**	−0.0166NS
										(1.27e-2)
RR	0.1486**	0.0886**	—	0.3535**	−0.2769**	0.0480*	−0.0454*	0.0267*	−0.0243**	0.2934**
						(5.36e-13)	(8.58e-12)	(6.04e-5)	(2.57e-4)
GC	−0.1837**	−0.1630**	0.2421**	—	−0.0617**	0.5694**	0.1899**	0.6100**	0.5096**	−0.1322**
RD	−0.0703**	−0.0878**	−0.1876**	−0.0412*	—	0.0226*	0.0617**	−0.0248*	−0.0356*	0.0539*
				(1.63e-20)		(6.81e-4)		(1.93e-4)	(8.86e-8)	(5.55e-16)
Dn	−0.2079**	−0.1733**	0.0337*	0.4141**	0.0166*	—	0.3027**	0.8941**	0.6772**	−0.1727**
			(2.81e-13)		(3.17e-4)
Dx	−0.1150**	−0.1080**	−0.0313*	0.1296**	0.0425*	0.2204**	—	0.3008**	0.4965**	−0.0444*
			(8.27e-12)		(1.81e-20)					(2.53e-11)
FDn	−0.2213**	−0.1606**	0.0188*	0.4397**	−0.0163*	0.7379**	0.2119**	—	0.8260**	−0.3022**
			(3.03e-5)		(3.08e-4)
FDx	−0.2096**	−0.1446**	−0.0157*	0.3535**	−0.0238*	0.5045**	0.3524**	0.6493**	—	−0.3242**
			(4.00e-4)		(7.89e-8)
dneu	0.2011**	−0.0109NS	0.2011**	−0.0917**	0.0365*	−0.1264**	−0.0320*	−0.2115**	−0.2226**	—
		(1.38e-2)			(2.12e-16)		(2.96e-12)

**: P<1e-20.

*: 1e-20≤P<1e-3.

^NS P> = 1e-3.

Spearman's ρ and Kendall's τ are given at the upper and lower diagonal parts of the table, respectively. P-values are given in parentheses for marginally significant (1e-20≤P<1e-3) and nonsignificant (NS, P> = 1e-3) values.