Table 3.

Ka/Ks ratios of PCGs in C. chinensis, C. deltoidea and C. omeiensis.

Gene	Ka/Ks (C. deltoidea vs C. omeiensis)	Ka/Ks (C. deltoidea vs C. chinensis)	Ka/Ks (C. chinensis vs C. omeiensis)
atp1	NaN	0.7089	0.7089
atp9	0.0633	0.3634	0.3703
nad1	1.1793	0.0000	1.0506
nad2	1.5681	1.3961	1.0443
nad5	0.5787	0.2194	0.3846
nad6	NaN	0.8762	0.8762
nad7	NaN	*	*
rpl5	NaN	0.4374	0.4374
rps3	2.9681	0.5424	0.4996
rps7	NaN	0.1296	0.1296
rps10	NaN	*	*
rps11	NaN	0.1445	0.1445
rps19	NaN	0.4182	0.4182
sdh4	NaN	*	*

When Ks = 0, the value cannot be calculated, it was represented by *. When Ka = 0 and Ks = 0, it was represented by NaN.