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Gene expression dominance in allopolyploids: hypotheses and models.

Bottani, S and Zabet, NR and Wendel, JF and Veitia, RA (2018) 'Gene expression dominance in allopolyploids: hypotheses and models.' Trends in Plant Science, 23 (5). pp. 393-402. ISSN 1360-1385

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The classical example of non-additive contributions of the two parents to allopolyploids is nucleolar dominance, which entails silencing of one parental set of ribosomal RNA genes. This has been observed for many other loci. The prevailing explanation for this genome-wide expression disparity is that the two merged genomes differ in their transposable element (TE) complement and in their level of TE-mediated repression of gene expression. Alternatively, and not exclusively, gene-expression dominance may arise from mismatches between trans effectors and their targets. Here, we explore quantitative models of regulatory mismatches leading to gene expression dominance. We also suggest that, when pairs of merged genomes are similar from one allopolyploidization event to another, gene-level and genome dominance patterns should also be similar.

Item Type: Article
Uncontrolled Keywords: gene duplication; paralogs; subfunctionalization; whole genome duplication
Subjects: Q Science > QH Natural history > QH426 Genetics
Divisions: Faculty of Science and Health
Faculty of Science and Health > Life Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 22 Feb 2018 14:12
Last Modified: 06 Jan 2022 13:46

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