Table 3.

The indexes of the codon usage bias of protein-coding genes of Orchidaceae.

	CAI	CBI	Fop	ENc	GC3s
Neottianthe monophylla	0.158	− 0.100	0.354	55.13	0.353
Herminium monorchis	0.169	− 0.068	0.375	55.00	0.372
Galearis roborowskyi	0.160	− 0.100	0.355	54.89	0.350
Ponerorchis chusua	0.161	− 0.093	0.359	55.29	0.358
Platanthera urceolata	0.160	− 0.105	0.351	54.85	0.351
Malaxis monophyllos	0.158	− 0.102	0.352	54.94	0.346
Ponerorchis compacta	0.160	− 0.091	0.357	55.15	0.354
Neottia puberula	0.158	− 0.086	0.359	55.41	0.364
Neottianthe cucullata	0.159	− 0.091	0.359	54.89	0.357