Uniparental expression of ribosomal RNA in ×Festulolium grasses: a link between the genome and nucleolar dominance.

ABSTRACT: Genome or genomic dominance (GD) is a phenomenon observed in hybrids when one parental genome becomes dominant over the other. It is manifested by the replacement of chromatin of the submissive genome by that of the dominant genome and by biased gene expression. Nucleolar dominance (ND) - the functional expression of only one parental set of ribosomal genes in hybrids - is another example of an intragenomic competitive process which, however, concerns ribosomal DNA only. Although GD and ND are relatively well understood, the nature and extent of their potential interdependence is mostly unknown. Here, we ask whether hybrids showing GD also exhibit ND and, if so, whether the dominant genome is the same. To test this, we used hybrids between Festuca and Lolium grasses (Festulol

SUBMITTER: Mahelka V 

PROVIDER: S-EPMC10544908 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature