Fig. 2From: Genome-wide characterization and expression analyses of superoxide dismutase (SOD) genes in Gossypium hirsutum Phylogenetic tree, and gene structure and domain analyses of superoxide dismutase (SOD) in Gossypium hirsutum. a Phylogenetic tree of G. hirsutum SODs constructed with MEGA 6.0 by the maximum likelihood method. Bootstrap values from 1,000 replicates are indicated at each branch. Groups Ia, Ib, Ic, IIa and IIb are brown, purple, yellow, green and blue, respectively. b Exon–intron structures of SOD genes. c Conserved domains annotated using the Pfam databaseBack to article page