Table 2. Characteristics of the chloroplast genomes of nine Dioscorea species.

Genme features	D. aspersa	D. alata	D. bulbifera	D. futschauensis	D. polystachya	D. elephantipes	D. villosa	D. zingiberensis	D. rotundata
Size (bp)	153,337	153,161	153,075	153,946	153,243	152,609	153,919	153,970	155,418
LSC length (bp)	83,517	83,414	83,226	83,979	83,431	82,777	83,865	83,950	85,600
IR length (bp)	25,478	25,464	25,499	25,529	25,489	25,513	25,576	25,491	25,484
SSC length (bp)	18,864	18,819	18,851	18,909	18,834	18,806	18,902	19,038	18,850
Total genes	112	112	112	112	112	112	112	112	112
Protein coding genes	78	78	78	78	78	78	78	78	78
tRNA genes	30	30	30	30	30	30	30	30	30
rRNA genes	4	4	4	4	4	4	4	4	4
Overall GC content (%)	37.0	37.0	37.0	37.2	37	37.2	37.2	37.2	37.2
GC content in LSC (%)	34.8	34.8	34.8	35.0	34.8	34.9	35.0	35.1	35.2
GC content in SSC (%)	31.0	31.0	30.8	31.2	30.9	31.2	31.2	31.2	30.9
GC content in IR (%)	43.0	43.0	43.0	43.0	42.9	43.0	43.0	43.0	42.9