Fig. 1

Comprehensive analysis of the GLN gene family traits of the four cotton species. a Phylogenetic analysis of the GLN proteins from four cotton species. A bootstrap analysis with 1000 iterations was performed after the phylogenetic tree was created using the neighbor-joining (NJ) technique. b Exon organization of the GLN genes. Yellow boxes represent exons. C The 15 conserved motifs of the GLN proteins of the four cotton species. The motifs are indicated by various colored boxes