Differential Gene Expression and Unbalanced Homeolog Expression Bias in 4 Million-Year-Old Allopolyploids of Nicotiana Section Repandae.

ABSTRACT: Allopolyploidy, a phenomenon prevalent in angiosperms involving hybridization and whole-genome duplication, results in species with multiple subgenomes, altering genome structure and gene expression, leading to novel phenotypes. Allopolyploids often experience unbalanced homeolog expression bias, the preferential expression of homeologs from one of the two progenitor genomes. To explore the consequences of allopolyploidy and unbalanced homeolog expression bias, we investigate global gene expression and the fate of homeologs in Nicotiana (Solanaceae). We focus on Nicotiana section Repandae, including three allotetraploid species, Nicotiana nudicaulis, N. repanda, and N. stocktonii, derived from diploid progenitors N. sylvestris and N. obtusifolia ∼4.3 Ma. We identify genes with differential

SUBMITTER: Ostovar T 

PROVIDER: S-EPMC11890095 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature