Table 2.

Codon models for ppc-1E1 of Caryophyllales

Model	Foreground branches	Number of parameters	Log- likelihood	AIC score
M1aa	–	399	–49702	10202
M2ab	–	401	–49702	10206
Ac	(a) each C4 and CAM groupsd	401	–49588	99978
Ac	(b) a + ppc-1E1c	401	–49523	99848
Ac	(c) b + ppc-1E1d + ppc-1E1e	401	–49383	99568
Ac	(d) c + ppc-1E1b	401	–49416	99634
Ac	(e) d + ppc-1E1a	401	–49556	99914

^a Site model without adaptive evolution.

^b Site model with adaptive evolution.

^c Branch-site model with adaptive evolution.

^d Except for Portulacineae other than Portulaca.