Genome-Wide Identification of the Gene Family and Expression Analysis under Drought Stress in L.

TGA transcription factors belong to Group D of the bZIP transcription factors family and play vital roles in the stress response of plants. is an oil crop with rich economic value. However, a systematic analysis of gene family members in has not yet been reported. In this study, we identified 39 full-length genes in , renamed ~. Thirty-nine genes were distributed on 18 chromosomes, mainly located in the nucleus, and differences were observed in their 3D structures. Phylogenetic analysis showed that 39 genes could be divided into five groups. The genes in the same group had similar structure and motif compositions, and all the genes had the same conserved bZIP and DOG1 domains. Phylogenetic and synteny analysis showed that the genes had a close genetic relationship with the genes of the , and and may play an important role in evolution. In addition, qRT-PCR revealed that three genes () showed significant changes in eight experimental materials after drought treatment. Meanwhile, it can be inferred from the results of drought treatment on different varieties of rapeseed that the stress tolerance of parental rapeseed can be transmitted to the offspring through hybridization. In short, these findings have promoted the understanding of the gene family and will contribute to future research aimed at resistant breeding.