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Table 3 Model summary for multiple regression analysis of relationship between the number of transcripts reaching maximum expression (phase) and environmental predictors (photoperiod, maximum temperature, precipitation) over two week intervals for a full year

From: Transcription through the eye of a needle: daily and annual cyclic gene expression variation in Douglas-fir needles

ANOVA df Sum of squares Mean of squares F Pr(>|t|)
 photoperiod 2 27.03 13.51 49.29 1.168e-08
 temperature 1 1.897 1.897 6.920 0.0156
 precipitation 1 0.0014 0.0014 0.0051 0.9435
 residuals 21 5.757 0.2741 NA NA
Coefficients VIF b Std. Err. β Std. Err. T value Pr(>|t|)
 constant NA -1.307e + 00 1.967e-01 -1.130e-16 8.718e-02 −6.646 1.40e-06
 photoperiod 2.531 2.667e-03 1.281e-03 2.945e-01 1.414e-01 2.082 0.0497
 photoperiod2 1.494 8.037e-05 1.031e-05 8.468e-01 1.087e-01 7.793 1.25e-07
 temperature 2.822 −4.886e-02 1.951e-02 −3.739e-01 1.494e-01 −2.503 0.0206
 precipitation 2.186 −9.627e-03 1.343e-01 −9.424e-03 1.315e-01 −0.072 0.9435
  1. R2 = 0.834; Adjusted R2 = 0.802; Residual standard error = 0.4445 (21 d.f.); F-statistic: 26.38 on 4 and 21 d.f., p-value = 6.31e-08