Characterization of Gene Family in Whole-Genome and Exploration of Flowering Improvement Genes in .

Chrysanthemum is a well-known ornamental plant with numerous uses. is a large family of transcription factors known for a variety of functions ranging from stress resistance to plant growth and development. Due to the limited research on the family in chrysanthemums, we examined them for the first time in . A total of 138 genes were identified, which were classified into three groups. Group III in contains 53 members, which is larger than group III of . The number of introns varied from one to nine in the gene family. The "WRKYGQK" motif is conserved in 118 members, while other members showed slight variations. AuR and GRE responsive -acting elements were located in the promoter region of members, which are important for plant development and flowering induction. In addition, the W box was present in most genes; the recognition site for the gene may play a role in autoregulation and cross-regulation. The expression of the most variable 19 genes in terms of different parameters was observed at different stages. Among them, 10 genes were selected due to the presence of CpG islands, while nine genes were selected based on their close association with important genes related to floral traits. and exhibit differential expression at flowering stages in the capitulum, while methylation is detected in three genes, including , and Our results provide a basis for further exploration of members to find their functions in plant growth and development, especially in flowering traits.