Table 5.

P-values of the two-way ANOVAs of GC content, including the clade (Poaceae versus other families) and mating system effects and interactions. (The analysis was computed for total GC content (GC), GC3, GC in introns, third codon position AT versus GC polymorphism (PolGC3) and intron AT versus GC polymorphism (PolGC_introns) (see main text). The corresponding box plots are presented in figure 1. Significant values at 5% are boldfaced.)

	Poaceae/others	mating system	interaction
GC	<0.0001	0.005	0.0002
GC3	<0.0001	0.004	0.004
GCintrons	<0.0001	0.001	0.001
PolGC3	0.001	0.446	0.535
PolGCintrons	0.343	0.764	0.327