Repeat proliferation and partial endoreplication jointly shape the patterns of genome size evolution in orchids

0547334 - BÚ 2022 RIV GB eng J - Journal Article
Chumová, Zuzana - Záveská, Eliška - Hloušková, P. - Ponert, Jan - Schmidt, Philipp-André - Čertner, Martin - Mandáková, T. - Trávníček, Pavel
Repeat proliferation and partial endoreplication jointly shape the patterns of genome size evolution in orchids.
Plant Journal. Roč. 107, č. 2 (2021), s. 511-524. ISSN 0960-7412. E-ISSN 1365-313X
R&D Projects: GA ČR(CZ) GA17-18080S; GA ČR GA20-04844S
Institutional support: RVO:67985939
Keywords : Pleurothallidinae * chromosome numbers * GC content * genome size evolution * repetitive elements
OECD category: Plant sciences, botany
Impact factor: 7.091, year: 2021
Method of publishing: Limited access
https://doi.org/10.1111/tpj.15306

Phylogenetic relationships between 341 Pleurothallidinae representatives were refined using a target enrichment hybrid capture combined with high-throughput sequencing approach. Genome size and the type of endoreplication were assessed using flow cytometry supplemented with karyological analysis and low-coverage Illumina sequencing for repeatome analysis on a subset of samples. Data were analyzed using phylogeny-based models. Genome size diversity (0.2-5.1 Gbp) was mostly independent of profound chromosome count variation (2n = 12-90) but tightly linked with the overall content of repetitive DNA elements. Species with partial endoreplication (PE) had significantly greater genome sizes, and genomic repeat content was tightly correlated with the size of the non-endoreplicated part of the genome. In PE species, repetitive DNA is preferentially accumulated in the non-endoreplicated parts of their genomes.
Permanent Link: http://hdl.handle.net/11104/0324891