Table 6.

The degree of rate acceleration for synonymous substitutions (dS) on the branch leading to Poaceae relative to other branches in the phylogeny

Gene name/gene group	Leading to Poaceae	Internal Poaceae	Increase dS	Other monocots	Increase dS	Other angiosperms	Increase dS
atp	0.1868	0.0179	10.44	0.0679	2.75	0.0718	2.60
ccsA	0.2416	0.0251	9.63	0.1255	1.93	0.1003	2.41
cemA	0.1033	0.0199	5.18	0.0698	1.48	0.0743	1.39
clpP	0.3155	0.0164	19.23	0.0559	5.64	0.0617	5.11
matK	0.2907	0.0327	8.90	0.1101	2.64	0.0990	2.94
ndh	0.2280	0.0244	9.34	0.0872	2.62	0.0858	2.66
pet	0.1847	0.0190	9.74	0.0676	2.73	0.0653	2.83
psa	0.2004	0.0199	10.06	0.0686	2.92	0.0649	3.09
psb	0.1875	0.0188	9.99	0.0527	3.56	0.0571	3.28
rbcL	0.3270	0.0276	11.85	0.0716	4.57	0.0720	4.54
rpl	0.2773	0.0246	11.27	0.0715	3.88	0.0820	3.38
rps	0.1652	0.0195	8.49	0.0690	2.39	0.0693	2.38
rpo	0.2085	0.0250	8.33	0.0740	2.82	0.0778	2.68
Average	0.2243	0.0224	10.1888	0.0763	3.0708	0.0755	3.0230
P-value			P < 0.001**		P < 0.001**		P < 0.001 **

Asterisks show P-values that are significant after correction for multiple comparisons using Holm’s method, i.e., sequential Bonferroni correction (** α = 0.01, * α = 0.05)