Table 4 Correlation analysis between the A, U, C, G contents and A ₃, U ₃, C ₃, G ₃ contents in ORF of 48 polioviruses genomes

A

r = -0.093^N

r = -0.303*

r = -0.169^N

r = -0.185^N

r = -0.287*

r = -0.126

U

r = -0.078^N

r = 0.905**

r = -0.422**

r = -0.573**

r = -0.706**

r = -0.782**

G

r = -0.285*

r = -0.341*

r = 0.641**

r = 0.195^N

r = 0.777**

r = 0.556**

C

r = -0.529**

r = -0.509**

r = -0.014^N

r = 0.913**

r = 0.461**

r = 0.466**

G+C

r = -0.544**

r = -0.599**

r = 0.307 *

r = 0.807**

r = -0.851**

r = 0.708**

Axis 1

r = 0.541**

r = -0.700**

r = 0.360*

r = 0.401**

r = 0.502**