Table 1.
Genomic Characteristics of Different Selected Strains of Buchnera
| Subfamily | Aphidinae |
Eriosomatinaea | Lachninae |
|||
|---|---|---|---|---|---|---|
| Tribe | Macrosiphini | Aphidini | Fordini | Tuberolachnini | Eulachnini |
|
| Buchnera strain | BAp | BSg | BBp | BTs | BCt | BCc |
| Genome size (kb)b | 656c | 654c | 618 | 430c | 453 | 425c |
| Chromosome G+C content (%) | 26.3 | 25.3 | 25.3 | 21.6 | 23.0 | 20.1 |
| CDSs (chromosome+plasmid[s]) | 562+7+2c | 547+7+2c | 504+3 | 375+5+2c | 362+6 | 360+5+2c |
| tRNAs | 32 | 32 | 32 | 31 | 31 | 31 |
| rRNAs | 3 | 3 | 3 | 3 | 3 | 3 |
Note.—Comparison of genomic characteristics of Buchnera genomes from distinct aphid subfamilies. The genomic and genetic reduction undergone by the Lachninae’s bacteria is evident. Bap, Buchnera from Acyrthosiphon pisum strain APS; BSg, Buchnera from Schizaphis graminum.
Recent work by Zhang and Chen (1999) and Li et al. (2014) support the split of the Eriosomatinae into up to three subfamilies (Eriosomatinae, Pemphiginae, and Fordinae), given their paraphyly. Baizongia pistacea would then belong to the Eriosomatinae (if divided into two subfamilies) or the Fordinae (if divided into three subfamilies).
Reported genome sizes include both the plasmids.
pTrp plasmid numbers are reported from the assembled contigs, as they are estimated to contain repeated units of the trpE and trpG genes.