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Drosophila Evolution over Space and Time (DEST): A New Population Genomics Resource
Martin Kapun1,2, Joaquin C B Nunez3, María Bogaerts-Márquez4
1Department of Evolutionary Biology and Environmental Studies, University of Zürich, Switzerland.
Molecular Biology and Evolution
|September 1, 2021
Summary
Researchers created a new bioinformatics pipeline to integrate diverse Drosophila melanogaster genomic data. This enables the largest population genomics dataset, Drosophila Evolution over Space and Time (DEST), for studying evolutionary dynamics.
Area of Science:
- Population genetics
- Genomics
- Evolutionary biology
Background:
- Drosophila melanogaster is a key model organism in population genetics and genomics.
- Integrating diverse, large-scale genomic datasets from natural populations presents significant challenges due to varying sequencing technologies and bioinformatic pipelines.
- This heterogeneity hinders comprehensive evolutionary studies of Drosophila populations.
Purpose of the Study:
- To develop a robust bioinformatics pipeline for processing pooled sequencing (Pool-Seq) data from Drosophila melanogaster.
- To create the most extensive genomic data repository for Drosophila melanogaster, facilitating spatiotemporal evolutionary analyses.
- To provide a scalable community resource for population geneticists studying evolutionary dynamics.
Main Methods:
- Developed a bioinformatics pipeline to map Pool-Seq reads to a hologenome (fly and symbiont genomes).
- Employed heuristic (PoolSNP) and probabilistic (SNAPE-pooled) variant callers for allele frequency estimation.
- Integrated 271 population samples from over 100 locations across four continents, including seasonal and multi-year sampling.
Main Results:
- Generated the largest genomic data repository for Drosophila melanogaster to date, named Drosophila Evolution over Space and Time (DEST).
- The DEST dataset includes comprehensive sampling and environmental metadata.
- A web-based genome browser and portal offer accessible SNP data and analysis tools.
Conclusions:
- The developed pipeline and DEST dataset provide an unprecedented resource for analyzing spatiotemporal genetic patterns in Drosophila melanogaster.
- This scalable platform supports future extensions for a more extensive cosmopolitan dataset.
- Facilitates detailed investigation into the evolutionary dynamics of Drosophila populations.
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