biostudies-literatureUnknown14Zhang CNational Natural Science Foundation of ChinaDNA-binding with one finger (Dof) transcription factors play a crucial role in plant abiotic stress regulatory networks, although massive Dofs have been systematically characterized in plants, they have not been identified in the hexaploid crop sweetpotato. Herein, 43 <i>IbDof</i> genes were detected to be disproportionally dispersed across 14 of the 15 chromosomes of sweetpotato, and segmental duplications were discovered to be the major driving force for the expansion of <i>IbDofs</i>. The collinearity analysis of <i>IbDofs</i> with their related orthologs from eight plants revealed the potential evolutionary history of Dof gene family. Phylogenetic analysis displayed that IbDof proteins were assigned into nine subfamilies, and the regularity of gene structures and conserved motifs was cFrontiers in plant science1140727https://www.ebi.ac.uk/biostudies/studies/S-EPMC9989284biostudies-literatureGenome-wide survey and expression analysis of Dof transcription factor family in sweetpotato shed light on their promising functions in stress tolerance.PMC9989284Dong TZhu MHong HZhang JGuo FMa HLiu SZhang CYu JMeng XfalseGenome-wide survey and expression analysis of Dof transcription factor family in sweetpotato shed light on their promising functions in stress tolerance.DNA-binding with one finger (Dof) transcription factors play a crucial role in plant abiotic stress regulatory networks, although massive Dofs have been systematically characterized in plants, they have not been identified in the hexaploid crop sweetpotato. Herein, 43 <i>IbDof</i> genes were detected to be disproportionally dispersed across 14 of the 15 chromosomes of sweetpotato, and segmental duplications were discovered to be the major driving force for the expansion of <i>IbDofs</i>. The collinearity analysis of <i>IbDofs</i> with their related orthologs from eight plants revealed the potential evolutionary history of Dof gene family. Phylogenetic analysis displayed that IbDof proteins were assigned into nine subfamilies, and the regularity of gene structures and conserved motifs was c2023-01-01T00:00:00Z20232026-06-19T04:51:09.26Z2025-04-19T16:28:10.077ZS-EPMC99892843689587210.3389/fpls.2023.1140727