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Table 5 Temporal trend in the fitness variation among replicate populations, measured in the selective environment.

From: Experimental evolution with E. coli in diverse resource environments. I. Fluctuating environments promote divergence of replicate populations

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

  1. *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.
  2. †Reported as zero because the calculated variance component was negative, whereas the real value must be zero or positive.
  3. ‡The glu group is repeated for clarity.