Investigating the diversification of holocentromeric satellite DNA Tyba in Rhynchospora (Cyperaceae).

ABSTRACT:

Background and aims

Satellite DNAs (satDNAs) are repetitive sequences composed by tandemly arranged, often highly homogenized units called monomers. Although satDNAs are usually fast evolving, some satDNA families can be conserved across species separated by several millions of years, probably because of their functional roles in the genomes. Tyba was the first centromere-specific satDNA described for a holocentric organism, until now being characterized for only eight species of the genus Rhynchospora Vahl. (Cyperaceae). Here, we characterized Tyba across a broad sampling of the genus, analysing and comparing its evolutionary patterns with other satDNAs.

Methods

We characterized the structure and sequence evolution of satDNAs across a robust dadated phylogeny based on Hybri

SUBMITTER: Costa L 

PROVIDER: S-EPMC10184444 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature