Table 1.

Growth properties of competition survivors and their ancestors

		Mutation rate (relative to wild type)	Doubling time (min)			Maximum culture density (OD600)
Tube	Survivor			Precompetition	Postcompetition	P value	Precompetition	Postcompetition	P value
1	9D2	47	31.2 ± 0.7	32.1 ± 0.4	—	3.10 ± 0.10	4.45 ± 0.14	0.002
2	4G4	22	31.9 ± 0.5	31.3 ± 0.8	—	2.98 ± 0.07	3.71 ± 0.10	0.005
3	4G4	22	31.9 ± 0.5	31.6 ± 0.4	—	2.98 ± 0.07	3.23 ± 0.07	—
4	2E2	10	31.6 ± 0.5	29.2 ± 0.3	0.03	3.07 ± 0.08	3.10 ± 0.06	—
5	4G4	22	31.9 ± 0.5	31.4 ± 0.5	—	2.98 ± 0.07	3.56 ± 0.10	0.01
6	2E2	10	31.6 ± 0.5	31.8 ± 0.6	—	3.07 ± 0.08	3.62 ± 0.11	0.02

Cultures and measurements were made in triplicate with reported values given as the mean ± SE. P values were calculated by the Student’s t test.