Table 5

Temporal trend in the fitness variation among replicate populations, measured in the selective environment.

Group

1000 generations √Var W

2000 generations* √Var W

Δ √Var W


glu&mal set

glu

0.013

0.025

0.013

mal

0.015

0.000

-0.015

glu/mal

0.022

0.039

0.018

glu+mal

0.035

0.005

-0.030

glu&lac set

glu

0.013

0.025

0.013

lac

0.072

0.025

-0.047

glu/lac

0.086

0.062

-0.024

glu/lac: omitting outlier population

0.012

0.048

0.036

glu+lac

0.036

0.031

-0.005


*The 2000-generation means and variances were calculated using only the 4 fitness assays that were performed in the same experimental blocks as the 1000-generation assays.

Reported as zero because the calculated variance component was negative, whereas the real value must be zero or positive.

The glu group is repeated for clarity.

Cooper and Lenski BMC Evolutionary Biology 2010 10:11   doi:10.1186/1471-2148-10-11

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