Sequence analysis and genomic DNA structures of GhMPK20. (A) Alignment of the amino acid sequences of GhMPK20 (HQ828072) with AtMPK20 (AEC10180), GhMPK15 (XP_016747991), GhMPK16 (ADI52623), GhMPK19 (NP_001314211) and OsMPK20 (XP_015621247). Identical amino acids are shaded in black. The conserved subdomains are shown with numerals (I–XI) and underlined at the top of the sequences. The TDY motif is marked by a dot. (B) Comparison of the genomic DNA structure of GhMPK20 with that of other group D mitogen‐activated protein kinases (MAPKs). The legend displays the pattern of exons, introns and untranslated regions (UTRs). The scale of the x‐axis indicates the length of the sequence. The abbreviations of the species names are as follows: At, Arabidopsis thaliana; Gh, Gossypium hirsutum; Os, Oryza sativa.