Genome-Wide Identification and Evolutionary Analysis of the bHLH Transcription Factor Family in Rosa roxburghii.

ABSTRACT: The basic/helix-loop-helix (bHLH) transcription factors are crucial regulators of plant development and stress responses. In this study, we conducted a genome-wide analysis of the bHLH family in Rosa roxburghii, an economically important fruit crop. A total of 89 non-redundant RrbHLHs were identified and unevenly distributed across the seven chromosomes. Phylogenetic analysis classified them into 23 subfamilies and 7 Arabidopsis subfamilies were absent, indicating lineage-specific evolutionary trajectories. Conserved motif and gene structure analyses showed that members within the same subfamily generally shared similar architectures, yet subfamily-specific variations were evident, suggesting potential functional diversification. Notably, key residues involved in DNA-b

SUBMITTER: Li YY 

PROVIDER: S-EPMC12842455 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature