Skip to main content
Epigenetic changes associated with reproductive investment and life-history trade-offs in lekking male black grouse (Lyrurus tetrix)

Epigenetic changes associated with reproductive investment and life-history trade-offs in lekking male black grouse (Lyrurus tetrix)

This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.

Downloads

Download Preprint

Authors

Rebecca Shuhua Chen , Carl D. Soulsbury, Joseph I. Hoffman, Kees van Oers

Abstract

Life-history trade-offs are a central concept in evolutionary biology, yet their underlying molecular mechanisms are not yet fully understood. Whilst much research has focused on genetic variation, epigenetic mechanisms, which regulate gene regulation, may be equally important. To investigate this, we collected blood samples from 50 male black grouse (Lyrurus tetrix) before and after the breeding (lekking) period and quantified genome-wide DNA methylation changes using reduced representation bisulphite sequencing. We identified 1,026 CpG sites that changed significantly in methylation across the breeding period, many residing within genes involved in the regulation of RNA biosynthesis. We tested whether these DNA methylation changes were associated with reproductive investment and future fitness-relevant traits: survival and the expression of post-breeding sexual ornaments, which reflect body condition after the strenuous lekking period. Dozens of CpG sites showed significant associations, often clustering within the same genes, suggesting that epigenetic changes associated with reproduction and survival are localized rather than widespread. Moreover, changes at three CpG sites exhibited opposite relationships between current reproductive investment and future fitness-relevant traits, suggesting that epigenetic mechanisms might contribute to shaping life-history trade-offs. Our study demonstrates that DNA methylation changes are associated with the expression of costly reproductive traits, highlighting the importance of epigenetic mechanisms in shaping life-history traits and fitness.

DOI

https://doi.org/10.32942/X2506F

Subjects

Genomics, Molecular Genetics, Other Ecology and Evolutionary Biology

Keywords

DNA methylation, Epigenetics, lekking, sexual ornaments, trade-off, black grouse

Dates

Published: 2025-10-05 06:31

Last Updated: 2025-10-05 06:31

License

CC BY Attribution 4.0 International

Additional Metadata

Conflict of interest statement:
The authors declare no conflicts of interest.

Data and Code Availability Statement:
Multiplexed EpiGBS sequencing data can be found under NCBI BioProject PRJNA1085187 with SRA BioAccession Numbers SAMN51757821 – SAMN51757844. Whole genome bisulphite sequencing data can be found under the same NCBI BioProject with SRA BioAccession Number SAMN51785344. All original code, metadata and phenotypic files have been deposited on Figshare with DOI 10.6084/m9.figshare.30186223. A large intermediate datafile containing the raw, unfiltered, methylKit object has been deposited on Figshare with DOI 10.6084/m9.figshare.30186571.v1. Any additional information required to reanalyze the data reported in this paper is available from the lead contact upon request.

Language:
English