Fig. 1From: Selection of reference genes for diurnal and developmental time-course real-time PCR expression analyses in lettuceExpression levels of candidate reference genes over a diurnal and b developmental timecourse experiments. The values are given as real-time PCR quantification cycle (Cq) values for individual reference genes. Boxes indicate the interquartile range and the line across the box depicts the median. Whiskers represent 95 % confidence intervalsBack to article page