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Table 2 Two-way analysis of variance for relative fitness of mutants in three different genetic backgrounds

From: Evolution of Escherichia coli rifampicin resistance in an antibiotic-free environment during thermal stress

Analysis of variance
Source df SS MS F values P
Background 2 1.23909 0.61955 207.9335 <0.0001***
Genotype (Mutation) 1 0.00737 0.00737 2.4734 0.12367
Background x Genotype 2 0.01881 0.00941 3.1568 0.05334
Residuals 40 0.11918 0.00298   
  1. We treated the genetic background and the genotype (mutation) as fixed effects.