Table 1 Results from a stepwise multiple linear regression model evaluating four regressor/explanatory variables as predictors of asymmetric rates of nucleotide sequence evolution between paralogs of 130 C. elegans gene duplicate pairs

R-square

0.1943

R-square adjusted

0.1751

Root mean square error

0.0098

Mean of response

0.0069

Observations

130

Analysis of variance:

Source

df

Sum of squares

Mean square

F-ratio

p-value

Model

3

0.00294

0.000981

10.1283

< 0.0001

Error

126

0.01220

0.000097

C. Total

129

0.01514

Parameter estimates:

Term

Estimate

Std. Error

t ratio

p-value

Intercept

0.005447

0.001834

2.97

0.0036

Chromosomal location (different)

0.002620

0.000997

2.63

0.0097

Duplication span

−0.000001

4.5e-7

−2.55

0.0120

K _S

0.121371

0.026453

4.59

<0.0001