Fig. 1.

Phylogenetic, chromosomal distribution and interchromosomal relationships of the Gh4CL genes. a Chromosomal distribution of Gh4CL genes. The gray lines indicate all synteny blocks in the genome of G. hirsutum and the red lines indicate interchromosomal relationships of Gh4CLs. The first circle represents individual chromosomes length. The second circle represents the gene density of each chromosome by color-coded short bars. The chromosome number were shown inside the circle. b The neighbor-joining phylogenetic tree was generated using 4CL protein sequences from G. hirsutum and six other plants