关键词: font-family:宋体, ">小麦；Dof转录因子；全基因组鉴定；表达模式

Abstract: The bioinformation methods were used to identify the Dof(DNA binding with one finger)transcription factor at genome-wide level in wheat,and the conserved domains,phylogenetic relationship,collinearity and expression patterns were also analyzed,so as to lay the foundation for function study of Dof transcription factor. The results showed that a total of 86 Dof genes were identified in wheat genome,they were unevenly distributed on the wheat chromosomes,and there were 30,29 and 27 Dof genes were distributed in A,B and D sub-genomes.Phylogenetic analysis showed that wheat Dof transcription factors could be divided into seven sub-groups,namely A,B,C1,C2,C3,D1 and D2,and D1 sub-group was the largest one with 29 members.The results of the multiple sequence alignment showed that all wheat Dof transcription factors contained a C-X₂ -C-X₂₁ -CX₂ -C motif.Collinearity analysis showed that 29 collinear gene pairs were formed by 23 Dof genes,indicating that duplication occurred during the evolution process.The expression patterns showed that Dof genes were differentially expressed in different tissues and under different abiotic stresses,indicating that Dof genes played important roles in plant growth and development,as well as in response to biotic and abiotic responses.

Key words: Wheat, Dof transcription factor, Genome-wide identification, Expression pattern