Fig. 2From: Cowpea and abiotic stresses: identification of reference genes for transcriptional profiling by qPCRgeNorm output, calculated by pairwise variation analysis between normalization factors NFn and NFn + 1, indicating the optimal number of reference genes (RGs) required for reliable normalization in cowpea accessions under: a Root dehydration stress and b salt stress (NaCl, 100 mM). RGs (Reference Genes)Back to article page