Variation and Morphological Manifestation of Germline-Restricted Chromosomes in Three Species of Leaf Warblers of Genus Phylloscopus
Year: 2025
Type: article
Abstract: INTRODUCTION: Germline restricted chromosomes are considered a rather ancient element in the genomes of passerine birds. Obviously, detailed comparative studies on model groups including closely related species are required for a better understanding of GRC evolution. It is especially interesting if GRCs in such closely related species have acquired significant differences. METHODS: In this work we compared three taxonomically close species of the genus Phylloscopus: Ph. sindianus lorenzii, Ph. collybita menzbieri, and Ph. nitidus, which have differences in morphological manifestation of GRCs: macro- and micro-GRCs. We studied synaptonemal complexes using immunocytochemistry methods. RESULTS: We were able to trace the morphological transformations of macro-GRC at stages from leptotene to diplotene, and describe the complex structure of this chromosome in Ph. nitidus. CONCLUSION: We hope that the taxonomic group under study can become a convenient model for comparative studies of GRCs in closely related species in order to understand the evolution of these unusual chromosomes.
Source: Cytogenetic and Genome Research
DOI: 10.1159/000545903
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W4409921377