Fig. 2
From: Calcium-dependent protein kinases in cotton: insights into early plant responses to salt stress
Phylogenetic relationships and exon-intron organization of G. hirsutum CPK genes (GhCPKs). The phylogenetic analysis of G. hirsutum CPK members (left) and the schematic for CPK intron-exon structures (right) of the four different groups. The phylogenetic tree was built using MEGA6.0 with the neighbor-joining method (1000 bootstrap replicates). Gene structures were inferred using GSDS 2.0 and are proportionally displayed according to the scale shown; the black lines indicate introns, while the red boxes represent exons