Table 2. Best-fit model and parameter for each dataset.

Region	AIC select model	Base frequencies				substitution model(rate matrix)						I	G
		A	C	G	T	A–C	A–G	A–T	C–G	C–T	G–T
ITS	TrN+I+G	0.1951	0.3045	0.3301	0.1704	1.0000	4.1184	1.0000	1.0000	6.2680	1.0000	0.4216	0.9399
trnL-F	TVM+I+G	0.3661	0.1329	0.1225	0.3785	0.8927	0.9529	0.7290	0.1252	0.9529	1.0000	0.3369	0.7421
matK	K81uf+I+G	0.3110	0.1651	0.1471	0.3769	1.0000	1.2207	0.4074	0.4074	1.2207	1.0000	0.3290	0.8743
Combined	K81uf+I+G	0.3098	0.1776	0.1680	0.3446	1.0000	1.6269	0.6450	0.6450	1.6269	1.0000	0.4392	0.7241