Table 3.

Mean numbers of synonymous (d_S) nucleotide substitutions per synonymous site and nonsynonymous (d_N) nucleotide substitutions per nonsynonymous site in dsx genes in comparisons within and between genera of Tephritidae and Drosophilidae.

Comparison	Common		Female-specific		Male-specific
	dS ± S.E.	dN ± S.E.	dS ± S.E.	dN ± S.E.	dS ± S.E.	dN ± S.E.
Within genera
Anastrepha	0.0428 ± 0.0083	0.0067 ± 0.0016d	0.0000 ± 0.0000g	0.0053 ± 0.0039	0.4361 ± 0.0797	0.0549 ± 0.0116d
Bactrocera	0.1622 ± 0.0210	0.0088 ± 0.0028d	0.0000 ± 0.0000g	0.0074 ± 0.0073	0.1276 ± 0.0314	0.0148 ± 0.0058d
Drosophila	0.5891 ± 0.0375	0.0375 ± 0.0069d	0.0786 ± 0.0433g	0.0000 ± 0.0000g	0.4914 ± 0.0812	0.0300 ± 0.0085d
Between genera
Anastrepha vs. Bactrocera	0.9708 ± 0.1312	0.0351 ± 0.0208d	0.2817 ± 0.1713f	0.0055 ± 0.0042	0.7984 ± 0.1807	0.1052 ± 0.0237d, e
Anastrepha vs. Drosophila	--a	0.1692 ± 0.0208	0.8113 ± 0.4083	0.0481± 0.0253g	2.4335 ± 0.6452	0.5684 ± 0.0833c, g
Bactrocera vs. Drosophila	--a	0.1807 ± 0.0216	1.2927 ± 0.5395	0.0338 ± 0.0213b,g	2.4357 ± 0.5142	0.5582 ± 0.0795d, g

^aThe quantity could not be estimated because of saturation of synonymous sites.

Z-tests of the hypothesis that mean d_S equals mean d_N:

^bP < 0.05;

^cP < 0.01;

^dP < 0.001.

Z-tests of the hypothesis that mean d_S or d_N equals the corresponding value for the common domain:

^eP < 0.05.;

^fP < 0.01;

^gP < 0.001.