Genome-Wide Analyses of the Soybean GmABCB Gene Family in Response to Salt Stress

Background: Soybean (Glycine max (L.) Merr.) is a significant economic oilseed crop, and saline-alkali soils restrict soybean yield. Identifying salt-tolerant genes is a key strategy for enhancing soybean productivity under saline-alkali conditions. The roles of the GmABCB gene family in growth, development, and stress resistance remain incompletely understood. Methods: Bioinformatics approaches were employed to identify and analyze GmABCB genes. A total of 39 GmABCB genes were identified and analyzed in the soybean genome, focusing on their phylogenetic relationships, chromosomal distribution, gene structure, cis-acting elements, evolutionary history, and expression patterns under salt stress. Results: A total of 39 GmABCB genes were identified. These genes are unevenly distributed across the soybean genome, with 21 segmental duplication events identified. Several cis-acting elements associated with abiotic stress responses were identified. Conclusions: The GmABCB gene family likely regulates growth, development, and stress tolerance in soybean.