However, different experimental sets required a different pair of genes for normalization of gene expression, as indicated by pairwise variation analysis of G6PD and ADH3 genes for sets of reproductive stage and viral diseases, ELF1B and G6PD genes for foliar diseases (LLS and Rust), and the varietal set, whereas CYP2 and ELF1B genes for abiotic stress (drought and salinity) were sufficient for normalization of gene expression in peanut. The gene discussed is G6PD; the disease is viral load.