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

0575970 - BÚ 2024 RIV CH eng J - Journal Article
Mahelka, Václav - Kopecký, David - Majka, Joanna - Krak, Karol
Uniparental expression of ribosomal RNA in ×Festulolium grasses: a link between the genome and nucleolar dominance.
Frontiers in Plant Science. Roč. 14, 18 September (2023), č. článku 1276252. ISSN 1664-462X. E-ISSN 1664-462X
R&D Projects: GA ČR(CZ) GA20-10019S
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:67985939 ; RVO:61389030
Keywords : ribosomal DNA * nucleolar dominance * genome dominance * Festuca * Lolium * internal transcribed spacer * genomic in situ hybridization * fluorescent in situ hybridization
OECD category: Plant sciences, botany
Impact factor: 5.6, year: 2022
Method of publishing: Open access
https://doi.org/10.3389/fpls.2023.1276252

In hybrids resulting from interspecific crosses, there are usually competitive processes between individual subgenomes that result in some form of genomic dominance. However, this manifests itself in different ways and it is not clear that the dominant genome is always the same. In hybrids between fescues (Festuca) and ryegrasses (Lolium) that exhibit genomic dominance at the whole-genome level, we have studied nucleolar dominance (which manifests at the ribosomal DNA level) to determine whether the dominant genome is identical. In 31 genotypes from 4 generations and five hybrid combinations, we found that the dominant genome for nucleolar dominance was always identical to the dominant genome at the genome-wide level. Therefore, it is likely that genome-wide and nucleolar dominance are not independent processes.
Permanent Link: https://hdl.handle.net/11104/0345647