Plastome structure, phylogenomics and evolution of plastid genes in Swertia (Gentianaceae) in the Qing-Tibetan Plateau

Table 4 Codon feature of the 20 Swertia plastomes

Species	Codon No	GC1%	GC2%	GC3%	GCall%	ENC	CAI
S. bifolia	25,697	45.59	38.58	30.95	38.37	50.55	0.163
S. cincta	26,270	45.67	38.62	30.97	38.42	50.55	0.163
S. cordata	26,132	45.65	38.54	31.05	38.41	51.24	0.167
S. dichotoma	26,283	45.69	38.52	30.97	38.39	50.73	0.162
S diluta	26,266	45.65	38.64	31.20	38.49	50.74	0.162
S. erythrosticta	26,049	45.61	38.57	30.93	38.37	50.56	0.163
S. franchetiana	26,299	45.66	38.66	31.17	38.50	50.68	0.162
S. hispidicalyx	26,249	45.65	38.62	31.01	38.43	50.7	0.162
S. kouichensis	26,165	45.70	38.65	31.12	38.49	50.69	0.162
S. leducii	26,297	45.64	38.58	31.16	38.46	50.78	0.162
S. macrosperma	25,731	45.77	38.70	31.10	38.52	50.73	0.162
S. multicaulis	26,361	45.66	38.62	31.07	38.45	50.76	0.162
S. mussotii	25,635	45.75	38.70	31.15	38.53	50.68	0.162
S. przewalskii	26,340	45.61	38.58	30.94	38.38	50.58	0.163
S. pubescens	24,571	45.56	38.63	30.99	38.39	50.65	0.162
S. punicea	26,457	45.67	38.65	31.16	38.49	50.71	0.162
S. souliei	26,223	46.25	39.06	31.29	38.87	50.76	0.163
S. tetraptera	22,174	45.67	38.42	31.05	38.38	50.76	0.162
S. verticillifolia	25,697	45.67	38.58	31.09	38.45	50.77	0.162
S. wolfangiana	26,270	46.13	39.05	29.75	38.31	49.72	0.165

GCall the total GC content, GC1 the GC content at first codon position, GC2 the GC content at second codon position, GC3 the GC content at third codon position, CAI the codon adaptation index, ENC the effective number of codons

ISSN: 1471-2229