Satellite DNA Mapping in Suliformes (Aves): Insights into the Evolution of the Multiple Sex Chromosome System in <i>Sula</i> spp.

ABSTRACT:

Background

The order Suliformes exhibits significant karyotype diversity, with Sula species showing a Z₁Z₁Z₂Z₂/Z₁Z₂W multiple-sex chromosome system, an uncommon occurrence in avians. Satellite DNAs (satDNAs), which consist of tandemly repeated sequences, often vary considerably even among closely related species, making them valuable markers for studying karyotypic evolution, particularly that of sex chromosome evolution. This study aims to characterize and investigate the potential role of these sequences in the karyotypic evolution of the group, with special attention to the sex chromosomes.

Methods

Through characterizing satDNAs in two Suliformes species (Sula leucogaster and Nannopterum br

SUBMITTER: Pozzobon LC 

PROVIDER: S-EPMC12193320 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature