Fig. 3From: Evaluation of suitable reference genes for qRT-PCR normalization in strawberry (Fragaria × ananassa) under different experimental conditionsPairwise variation (V) for determination of optimal number of reference genes for qRT-PCR normalization. Pairwise variation (Vn/Vn+1) was analyzed between the normalization factors NFn and NFn+1 by the geNorm software. The optimal number of genes for normalization was determined based on V less than 0.15Back to article page