Genome-Wide Identification and Analysis of NF-Y Gene Family Reveal Its Potential Roles in Stress-Resistance in Chrysanthemum

Nuclear factor Y (NF-Y) is a class of transcription factors (TFs) with various biological functions that exist in almost all eukaryotes. In plants, heterotrimers composed different NF-Y subunits are numerous and have can participate the regulation plant growth at stages. However, genes not been systematically analyzed chrysanthemum, only involving several members. this study, forty-six members were identified from diploid species Chrysanthemum seticuspe, including eight NF-YA members, twenty-one NF-YB seventeen NF-YC These for their physicochemical characteristics, multiple alignments, conserved motifs, gene structure, promoter elements, chromosomal location. Phylogenetic analysis revealed two pairs C. seticuspe underwent duplication events. The Ka/Ks ratios both less than one, indicating purifying selection. Promoter element showed abiotic stress hormone response elements present CsNF-Y genes, suggesting these play an important role to stress, growth, development plants. Further validation candidate drought using RT-qPCR demonstrated regulation.