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Background  BRASSINAZOLE-RESISTANT (BZR) family genes encode plant-specific transcription factors (TFs) that participate in brassinosteroid signal transduction. BZR TFs have vital roles in plant growth, including cell elongation. However, little is known about  BZR  genes in sugar beet ( Beta vulgaris  L.).    Results  Therefore, we performed a genome-wide investigation of  BvBZR  genes in sugar beet. Through an analysis of the BES1_N conserved domain, six  BvBZR  gene family members were identified in the sugar beet genome, which clustered into three subgroups according to a phylogenetic analysis. Each clade was well defined by the conserved motifs, implying that close genetic relationships could be identified among the members of each subfamily. According to chromosomal distribution mapping, 2, 1, 1, 1, and 1 genes were located on chromosomes 1, 4, 5, 6, and 8, respectively. The  cis -acting elements related to taproot growth were randomly distributed in the promoter sequences of the  BvBZR  genes. Tissue-specific expression analyses indicated that all  BvBZR  genes were expressed in all three major tissue types (roots, stems, and leaves), with significantly higher expression in leaves. Subcellular localization analysis revealed that Bv1_fxre and Bv6_nyuw are localized in the nuclei, consistent with the prediction of Wolf PSORT.    Conclusion  These findings offer a basis to predict the functions of  BZR  genes in sugar beet, and lay a foundation for further research of the biological functions of  BZR  genes in sugar beet.    Electronic supplementary material  The online version of this article (10.1186/s12870-019-1783-1) contains supplementary material, which is available to authorized users.

Genome-wide identification, characterization, and expression patterns of the BZR transcription factor family in sugar beet (Beta vulgaris L.)