Figure 2From: Identification and evaluation of new reference genes in Gossypium hirsutumfor accurate normalization of real-time quantitative RT-PCR dataPairwise variation (V) to determine the optimal number of control genes for an accurate normalization. The pairwise variation (Vn/Vn+1) was analyzed between the normalization factors NFn and NFn+1 by the geNorm software. Asterisk indicates the optimal number of genes for normalization.Back to article page