Table 2 Results from a stepwise multiple linear regression model evaluating four regressor/explanatory variables as predictors of asymmetric rates of amino acid sequence evolution between paralogs of 130 C. elegans gene duplicate pairs

R-square

0.1322

R-square adjusted

0.1115

Root mean square error

0.0228

Mean of response

0.0136

Observations

130

Analysis of variance:

Source

df

Sum of squares

Mean square

F-ratio

p-value

Model

3

0.01002

0.003341

6.3983

0.0005

Error

126

0.06580

0.000552

C. total

129

0.07582

Parameter estimates:

Term

Estimate

Std. error

t ratio

p-value

Intercept

0.013279

0.004258

3.12

0.0023

Chromosomal location (different)

0.005298

0.002316

2.29

0.0238

Duplication span

−0.000003

0.000001

−2.53

0.0127

K _S

0.200085

0.061427

3.26

0.0014