Comprehensive analysis of NAC transcription factors in diploid Gossypium: sequence conservation and expression analysis uncover their roles during fiber development

摘要: Determining how function evolves following gene duplication is necessary for understanding expansion. Transcription factors (TFs) are a class of proteins that regulate expression by binding to specific cis-acting elements in the promoters target genes, subsequently activating or repressing their transcription. In present study, we systematically examined functional diversification NAC transcription factor (NAC-TFs) family analyzing chromosomal location, structure, phylogeny, and pattern Gossypium raimondii (Gr) G. arboreum (Ga). The 145 141 genes identified Gr Ga genomes, respectively, were annotated divided into 18 subfamilies, which showed distinct divergence structure patterns during fiber development. addition, when parameters examined, clear was observed within tandem clusters, suggested subfunctionalization had occurred among duplicate genes. homologous pairs also changed, suggestive evolution diploid cotton. These findings provide insights mechanisms underlying differentiation duplicated NAC-TFs two cotton species.