Table 1.

Genomic composition of coding region of Citrus species and P. trifoliata at GC, GC₁, GC₂, GC₃, and GC_3s

No.	Citrus species	Genes/ESTa	Unigenes count	Genesb	GC	GC1	GC2	GC3	GC3s
1	C. sinensis	44 275	–	41362	43.92	50.4	40.33	41.03	38.8
2	C. aurantifolia	8219	7550	4715	47.78	52.96	43.87	46.52	44.73
3	C. aurantium	14 584	11 952	6787	46.93	52.47	42.59	45.72	43.94
4	C. clementina	118 365	51 591	33 765	47.04	51.84	42.51	46.76	44.99
5	C. clementina × C. tangerina	1843	1283	677	44.66	51.67	39.77	42.55	40.47
6	C. jambhiri	1017	858	701	45.86	51.79	41.13	44.66	42.67
7	C. japonica var. margarita	2924	1628	588	46.11	52.67	41.42	44.25	42.35
8	C. limettioides	8188	7933	3964	46.47	50.76	42.75	45.9	44.25
9	C. limonia	11 045	9761	4256	45.82	51.13	41.37	44.96	43.17
10	C. medica	1115	896	711	45.65	51.91	40.9	44.13	42.15
11	C. reshni	5768	3735	2644	45.2	51.51	40.57	43.52	41.5
12	C. reticulata	55 980	46 170	30 816	46.85	52.3	42.77	45.48	43.62
13	C. reticulata × C. temple	5823	3685	2253	46.48	52.41	41.64	45.41	43.41
14	C. sinensis × P. trifoliata	1837	1522	992	46.07	51.67	41.41	45.15	43.23
15	C. sunki	5216	4688	1746	47.58	51.51	43.58	47.64	46.17
16	P. trifoliata	62 695	35 740	19 445	46.78	52.33	42.67	45.35	43.52
17	C. unshiu	19 072	9289	4592	45.67	51.72	41.14	44.15	42.21
18	C. paradisi	8039	4621	2517	45.32	52.19	40.51	43.27	41.3
19	C. paradisi × P. trifoliata	7954	3335	2596	45.23	51.96	40.77	42.98	40.96

Means of GC% were calculated at the first, second, and third positions. GC_3s represents the GC at the third synonymous position.

^aIn C. sinensis, genome-predicted coding regions are used, whereas for the rest of the species, the number represents the EST count in the column (genes/EST).

^bSelected genes above 300 bp threshold.