Table 1 Effects of (a) gamma irradiation treatment (0.0, 1.4 and 50.0 mGy.h− 1) and (b) time (EDF: effective degrees of freedom) on C. elegans population fitness index during the 20 transfers of a multigenerational experiment. Ns: no significant; *, P < 0.05; **, P < 0.01; ***, P < 0.001
From: Host defense alteration in Caenorhabditis elegans after evolution under ionizing radiation
a) | Estimate | Std. Error | t value | Pr(>|t|) | Â |
|---|---|---|---|---|---|
(Intercept) | 7.750 | 0.042 | 185.35 | < 2.00 e-16 | *** |
Low radiation | -0.200 | 0.059 | -3.39 | 0.0007 | *** |
High radiation | -0.331 | 0.059 | -5.66 | 2.36 e-08 | *** |
Approximate significance of smooth terms | Â | Â | Â | Â | |
b) | edf | Ref.df | F | p-value | Â |
s(Time): Control | 2.409 | 2.409 | 3.678 | 0.017 | * |
s(Time): Low radiation | 1.000 | 1.000 | 3.689 | 0.055 | ns |
s(Time): High radiation | 3.470 | 3.470 | 4.223 | 0.003 | ** |