Fig. 2From: Selection and validation of reference genes for RT-qPCR analysis in potato under abiotic stressExpression levels of candidate reference genes in experimental samples. Expression data are displayed as Cq values for each reference gene in all samples. The line across the box indicates the median. The box indicates the 25 and 75th percentiles. Whiskers represent the maximum and minimum values. Points represent the average. a Drought, b osmotic, c simulated droughtBack to article page