Table 3.

Changes in GC3 along Branches of Commelinids

	All Genes	1 Exon Genes	2 Exons Genes	>2 Exons Genes
Mean GC3commelinids	0.601	0.824	0.739	0.563
Mean tree length	2.038	2.27	2.334	1.982
ΔGC3commelinids→rice	−0.019*	−0.040*	−0.024	−0.016
ΔGC3commelinids→maize	−0.017	−0.045*	−0.034	−0.011
ΔGC3commelinids→banana	−0.103***	−0.132*	−0.152**	−0.097***
ΔGC3commelinids→palmtree	−0.100***	−0.159*	−0.201***	−0.086***

Note.—The gene structure for the commelinids ancestor was taken as that of rice. The gene structure of palm tree was taken as that of banana. *P-value < 0.05; **P-value $<{10}^{-5}$; ***P-value $<{10}^{-10}$.