Table 1. Average genome size and average genomic C+G content in different kingdoms and subkingdoms.
| Kingdom or subkingdom | Number of genomes | Average genome size (Mb) | Average genome C+G (%) |
| Kingdoms: | |||
| Archaeans | 58 | 1.86 | 44.88 |
| Bacteria | 430 | 2.61 | 50.76 |
| Fungi | 11 | 18.44 | 47.96 |
| Protists | 21 | 3.16 | 26.42 |
| Plants | 10 | 538.84 | 41.10 |
| Animals | 18 | 1,837.44 | 41.20 |
| Subkingdoms: | |||
| Gram-positive bacteria | 184 | 2.53 | 49.40 |
| Gram-negative bacteria | 246 | 2.67 | 51.71 |
| Dicot plants | 6 | 368.78 | 34.15 |
| Monocot plants | 4 | 793.93 | 45.93 |
| Non-mammalian animals | 6 | 674.06 | 39.44 |
| Non-primate mammalian animals | 7 | 2,190.40 | 41.97 |
| Primate animals | 5 | 2,739.35 | 40.85 |