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. 2009 Oct 30;76(1):275–282. doi: 10.1128/AEM.02154-09

TABLE 2.

A relative-rate test for comparing the molecular evolutionary rates of 16S rRNA and groEL gene sequences between the lineages of the primary and secondary symbionts of Curculio weevils and their free-living relatives

Gene Lineage 1 Lineage 2 Outgroup K1a K2b Difference of distance between K1 and K2 K1/K2 ratio P valuec
16S rRNA gene of the primary symbionts (“Ca. Curculioniphilus”) P-symbionts of Curculio spp.d Escherichia coli and Salmonella enterica serovar Typhie V. choleraef 0.059 0.041 0.018 1.4 0.049
groEL gene of the primary symbionts (“Ca. Curculioniphilus”) P-symbionts of Curculio spp.g E. coli and S. Typhih V. choleraei 0.080 0.019 0.061 4.2 3.4 × 10−6
16S rRNA gene of the secondary symbionts (Sodalis-allied) S-symbionts of Curculio spp.j E. coli and S. Typhie V. choleraef 0.029 0.031 −0.002 0.94 0.82
groEL gene of the secondary symbionts (Sodalis-allied) S-symbionts ofCurculio spp.k E. coli and S. Typhih V. choleraei 0.030 0.014 0.016 2.1 0.066
a

Estimated mean distance between lineage 1 and the last common ancestor of lineages 1 and 2.

b

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 (35).

d

P-symbiont of C. sikkimensis (AB514502), C. camelliae (AB507716), C. dentipes (AB507714), and C. robustus (AB507715).

e

E. coli (J01695) and S. Typhi (U88545).

f

V. cholerae (X74694).

g

P-symbiont of C. sikkimensis (AB514497) and C. camelliae (AB514498).

h

E. coli (X07850) and S. Typhi (U01039).

i

V. cholerae (CP000627).

j

S-symbiont of C. sikkimensis (AB514505 and AB517595).

k

S-symbiont of C. sikkimensis (AB514501).