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Bacterial genome reconstruction and community profiling in Neotropical Drosophila


Abstract

Drosophila species serve as key models for microbiota research due to their relatively simple microbial communities. However, microbial diversity and dynamics in Neotropical Andean Drosophila remain underexplored. Here we applied shotgun metagenomics to characterize the microbiota of 24 Neotropical Drosophila species from Ecuador, reconstructing 64 high-quality bacterial genomes predominantly from Acetobacteraceae and Enterobacterales. Microbial communities were consistently dominated by yeasts, lactic acid bacteria, acetic acid bacteria, and Wolbachia. Comparative analyses revealed no strong correlation between host phylogeny and microbial community composition, suggesting environmental factors and microbial interactions shape these communities. Notably, shifts in relative abundances indicate dynamic ecological succession and metabolic cooperation among microbes. These findings expand genomic resources for Drosophila-associated bacteria and highlight the complex ecological processes influencing host–microbiota relationships in natural populations.

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Data availability

The *Drosophila* -filtered metagenomic libraries and high-quality MAGs derived from this study have been deposited in the European Nucleotide Archive (ENA) under Project ID PRJEB70495.

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Acknowledgements

We thank the LMI-BIO-INCA (International Mixed Laboratory on Biodiversity and Sustainable Agriculture in the Tropical Andes) funded by the French Research Institute for Development for partially funding travel opportunities to create the network that led to the current study. We thank Pilar Garcia Guerreiro and the Universitat Autónoma de Barcelona for their support for DNA extraction. We also thank the Ministerio del Ambiente del Ecuador (MAE) for the permission granted (MAE-DNB-CM-2015-0030) to develop this research. We thank the IT Services Department and the ExaCore-IT Core Facility, Vice Presidency for Research and Creation, Universidad de Los Andes, for providing high-performance computing support.

Funding

This work was supported by the research grant QINV0196-IINV529010100 from the Pontificia Universidad Católica del Ecuador (PUCE).

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M.A.U. and A.V.S. performed data processing, interpretation, data analysis, visualization and wrote the initial manuscript draft. L.C.C. contributed to data processing. R.G. assisted with data acquisition and bioinformatic analyse. D.V. contributed to study design field sample collection and provided ecological context for data interpretation. A.R.M. supervised the study, secured funding, and contributed to the conceptualization and final editing of the manuscript. All authors reviewed and approved the final version of the manuscript.

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Alejandro Reyes Muñoz.

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Ulloa, M.A., Serrano, A.V., Camelo, L.C. et al. Bacterial genome reconstruction and community profiling in Neotropical Drosophila.
Sci Rep (2026). https://doi.org/10.1038/s41598-026-36282-y

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Keywords

  • Neotropical Drosophila spp
  • Metagenome-assembled genomes (MAGs)
  • Microbiota
  • Gut bacteria
  • Phylogenetic analysis


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