| Summary: | The DNA-binding with one zinc finger (<i>Dof</i>) family of plant-specific transcription factors has a variety of important functions in gene transcriptional regulation, development, and stress responses. However, the structure and expression patterns of <i>Dof</i> family have not been identified in <i>Cleistogenes songorica</i>, which is an important xerophytic and perennial gramineous grass in desert grassland. In this study, 50 <i>Dof</i> genes were identified in <i>C. songorica</i> and could be classified into four groups. According to genome-wide analysis, 46 of 50 <i>Dof</i> genes were located on 20 chromosomes, and the gene structure and conserved protein motif of these proteins were analyzed. In addition, phylogenetic analysis of <i>Dof</i> genes in <i>C. songorica</i>, <i>Arabidopsis thaliana</i>, <i>Oryza sativa</i>, and <i>Brachypodium distachyon</i> estimated the evolutionary relationships, and these genes were grouped into seven clusters. Moreover, the expression profiles of these <i>Dof</i> genes in <i>C. songorica</i> were analyzed in response to high/low temperature, salinity, and ABA treatments. These results will provide valuable information for future studies on gene classification, cloning, and functional characterization of this family in <i>C. songorica</i>.
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