Genome-wide analysis of NAC transcription factors in grain amaranth reveals structural diversity and regulatory features.

ABSTRACT: Grain amaranth (Amaranthus hypochondriacus) is a climate-resilient pseudo-cereal with high nutritional value and stress tolerance. NAC transcription factors (TFs) are key regulators in plant development and environmental responses. Here, we performed a comprehensive genome-wide analysis of 70 NAC genes (AhypNACs), classified into 24 phylogenetic subfamilies. Gene structure analysis showed exon variation (1-7), and chromosomal mapping revealed uneven distribution, with 32 segmental, 5 tandem, and 32 transposed duplications. Promoter analysis identified diverse cis-regulatory elements linked to light, hormone signaling, and stress response. miRNA analysis suggested Ahyp-miR164a targets four NAC genes, indicating post-transcriptional control. Comparative genomics showed both conserved and lin

SUBMITTER: Eerapagula R 

PROVIDER: S-EPMC12618503 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature