Statistical significance of explanatory variables in the best-fitting models for the data set with OD ratios and without OD ratios.

The best-fitting models were determined by comparing AIC values among models that considered all possible combinations of explanatory variables. Statistical significance was determined using an ANOVA model with type III sums-of-squares (SS). Variables with P<0.05 are shown in bold. Partial r2 values (coefficient of determination) were determined by dividing SS values of each factor by total SS.
1Numerator (first number) and denominator (second number) degrees of freedom (df) for F-test.
2RNA integrity number (RIN).
3Mass of total RNA sequenced.
Other abbreviations as per Table 1.