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. 2013 Feb 22;13:50. doi: 10.1186/1471-2148-13-50

Table 2.

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

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    

We treated the genetic background and the genotype (mutation) as fixed effects.