Table 1. Summary of four Silene mitochondrial genomes.
| Genome Characteristics | S. latifolia | S. vulgaris | S. noctiflora | S. conica |
| Genome size in kb | 253 | 427 | 6,728 | 11,318 |
| Circular chromosomes | 1 | 4 | 59 | 128+ |
| Percent G+C content | 42.6 | 41.8 | 40.8 | 43.1 |
| Protein genes a | 25 | 25 | 26 | 25 |
| tRNA genes a | 9 | 6 | 3 | 2 |
| Native | 6 | 3 | 3 | 2 |
| Plastid-derived | 3 | 3b | 0 | 0 |
| rRNA genes a | 3 | 3 | 3 | 3 |
| Introns a | 19 | 19 | 18 | 19 |
| cis-spliced | 13 | 13 | 12 | 13 |
| trans-spliced | 6 | 6 | 6 | 6 |
| Genic gontent in kb (percent coverage) a | 51 (20.3) | 48 (11.2) | 72 (1.1) | 77 (0.7) |
| Exonic | 34 (13.6) | 31 (7.2) | 58 (0.9) | 57 (0.5) |
| Intronicc | 17 (6.7) | 17 (4.0) | 14 (0.2) | 20 (0.2) |
| Intergenic content in kb (percent coverage) | 202 (79.7) | 379 (88.8) | 6,656 (98.9) | 11,241 (99.3) |
| Plastid-derived | 2 (1.0) | 10 (2.3) | 17 (0.3) | 35 (0.3) |
| Conserved with other plant mtDNAd | 95 (37.7) | 73 (17.0) | 843 (12.5) | 834 (7.4) |
| Conserved with GenBank nr/nte | 5 (2.0) | 3 (0.7) | 20 (0.3) | 16 (0.1) |
| Uncharacterized | 99 (39.0) | 294 (68.9) | 5,776 (85.9) | 10,356 (91.5) |
| Repetitive content in kb (percent coverage) | 17 (6.7) | 80 (18.8) | 735 (10.9) | 4,621 (40.8) |
| Large repeats: >1 kb | 12 (4.9) | 57 (13.3) | 110 (1.6) | 1,121 (9.9) |
| Small repeats: ≤1 kb | 5 (1.8) | 23 (5.5) | 625 (9.3) | 3,500 (30.9) |
| RNA editing sites | 287 | 271f | 189 | 182f |
| Non-Syn. substitution rate (×10−9/y) | 0.08 | 0.35 | 8.90 | 9.98 |
| Syn. substitution rate (×10−9/y) | 0.70 | 1.60 | 58.17 | 68.22 |
| d N/ d S | 0.12 | 0.22 | 0.15 | 0.15 |
a
Duplicate genes/introns are included in length and coverage statistics but excluded from reported counts.
b
Two of the S. vulgaris plastid-derived tRNA genes may not be functional (Figure 4).
c
Intron lengths only include cis-spliced introns.
d
Excludes regions of plastid-origin.
e
Excludes regions of plastid-origin and regions conserved in other plant mitochondrial genomes.
f
Predicted.