Table 1

Conjugation frequencies and generation times

ConditionRecipientPlasmidFrequency of transferSDP valueaGeneration time (min)SDP valuea
FilterJ53-2bpCT1.70 × 1021.41 × 10−2
pCT23.40 × 1022.28 × 10−20.226
3950bpCT6.12 × 1061.27 × 10−6
pCT28.71 × 1066.86 × 10−60.555
SL1344bpCT5.95 × 1065.39 × 10−5
pCT22.27 × 1059.34 × 10−60.033
BrothJ53-2None63.54.7
pCT7.28 × 1056.14 × 10−567.13.8
pCT22.59 × 1043.29 × 10−40.30963.35.80.95
3950None64.72.1
pCT1.394 × 1051.52 × 10−468.75.5
pCT23.14 × 1045.08 × 10−30.17769.25.10.39
SL1344None94.16.0
pCT5.25 × 1065.92 × 10−695.211.7
pCT22.50 × 1051.98 × 10−50.179100.79.80.28
  • a The P values compare the significances of values between data from strains carrying pCT and pCT2.

  • b Recipient strains included E. coli J-53, a common laboratory plasmid host, E. coli 3950 the original parent of pCT and Salmonella Typhimurium SL1344, a wild type of another species.