Real-time qRT-PCR analysis of MAPK genes in different tissues and organs in G. hirsutum acc. TM-1. A total of eight cotton tissues (root; stem; leaf; petal; anther; ovule at 0 day post anthesis (DPA); fiber at 10 DPA; and fiber at 21 DPA) were sampled to analyze. Differences in gene expression intensities are shown in colors indicated in the scale. Phylogenetic analysis was done using the ML method with 1,000 resampling replicates. Bootstrap values (%) based on 1000 replicates are indicated beside the nodes.