Figure 1From: Validation of reference genes for quantitative RT-PCR studies of gene expression in perennial ryegrass (Lolium perenne L.)Crossing point (Cp) value variability in candidate reference gene comparisons for the 442 perennial ryegrass samples. Variability is displayed as medians (lines), 25th percentile to the 75th percentile (boxes) and ranges (whiskers).Back to article page