Gene Expression Dominance in Allopolyploids: Hypotheses and Models.
Trends Plant Sci
; 23(5): 393-402, 2018 05.
Article
en En
| MEDLINE
| ID: mdl-29433919
ABSTRACT
The classical example of nonadditive 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.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Poliploidía
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Genes de Plantas
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Genoma de Planta
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Regulación de la Expresión Génica de las Plantas
Idioma:
En
Revista:
Trends Plant Sci
Asunto de la revista:
BOTANICA
Año:
2018
Tipo del documento:
Article