Table 3.

Correlation coefficients between the positions of genes along the first four major axes with an index of total genes’ amino acid usage.

	CAI	GRAVY	Aromo	Axis1	Axis2	Axis3
Gravy	0.080 **
Aromo	0.144 **	0.420 **
Axis1	−0.328 **	−0.182 **	−0.087 **
Axis2	−0.613 **	−0.054 **	−0.025 *	0.000
Axis3	−0.159 **	−0.056 **	0.007	0.000	0.001
Axis4	0.005	−0.008	−0.036 **	−0.003	−0.001	0.002

** p < 0.01; * p < 0.05.