TABLE 1.
Relative rate test for comparing the rates of molecular evolution of 16S rRNA, gyrB, and groEL gene sequences for the symbiont of P. japonensis and its free-living relatives
| Gene | Lineage 1 (accession no.) | Lineage 2 (accession no.) | Outgroup (accession no.) | K1a | K2b | K1 − K2 | K1/K2 | Pc |
|---|---|---|---|---|---|---|---|---|
| 16S rRNA | Gut symbiont of P. japonensis (AB548050) | Escherichia coli (U00096) and Salmonella enterica serovar Typhi (U88545) | Vibrio cholerae (X74694) | 0.076 | 0.038 | 0.038 | 2.0 | 0.00040 |
| gyrB | Gut symbiont of P. japonensis (AB548057) | Escherichia coli (NC_000913) and Salmonella enterica (NC_003198) | Vibrio cholerae (NC_002505) | 0.156 | 0.054 | 0.102 | 2.9 | 6.0 × 10−6 |
| groEL | Gut symbiont of P. japonensis (AB548064) | Escherichia coli (X07850) and Salmonella enterica serovar Typhi (U01039) | Vibrio cholerae (NC_009456) | 0.065 | 0.031 | 0.034 | 2.1 | 0.0034 |
a
K1 is the estimated mean distance between lineage 1 and the last common ancestor of lineages 1 and 2.
b
K2 is the estimated mean distance between lineage 2 and the last common ancestor of lineages 1 and 2.
c
P values were generated using the program RRTree (32).