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Human-Mediated Dispersal and Breeding Reshape Global Genomic Patterns in Black Soldier Flies

Our latest research reveals how human activities have significantly influenced the global distribution and genetic composition of Black Soldier Fly populations, with critical implications for sustainable insect farming.

Human activities, either intentional or unintentional, have significantly influenced the global distribution and genetic composition of many species. Black soldier fly (Hermetia illucens; BSF) is a species that has rapidly gained commercial importance due to its bioconversion efficiency of upcycling organic waste into new products of higher value and quality through a circular economy approach.

Our results reveal that most global captive BSF lines were largely derived from a single primary captive lineage, likely from North America. In contrast to the genetically diverse and geographically structured wild populations, captive populations consistently exhibited reduced heterozygosity, elevated inbreeding, and extensive runs of homozygosity.

These patterns reflect demographic processes such as founder effects and genetic drift, rather than intentional selection or domestication. This strongly highlights the lasting genomic impact of human-mediated dispersal and uncoordinated breeding practices.

Key Findings

Global captive BSF lines derived from a single North American lineage

Wild populations are genetically diverse and geographically structured

Captive populations show reduced heterozygosity and elevated inbreeding

Urgent need for genetically informed management strategies

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Research Implications

Our genomic research provides critical insights into the genetic impact of human-mediated dispersal, highlighting the urgent need for coordinated breeding strategies to ensure long-term viability and productivity of BSF farming.

Research Information

Lead Researchers

Zexi Cai, et al.

Publication Date

August 2025

Published In

Genomics

DOI

10.1016/j.ygeno.2026.111208

Keywords

Global Genomics, Population Genetics, Human-Mediated Dispersal, Inbreeding, BSF

Research Focus Areas

Global Population Genomics

Investigating genetic diversity, population structure, and evolutionary relationships of black soldier fly populations worldwide to understand the impact of human-mediated dispersal on genomic patterns.

Genomic Resources

Developing comprehensive genetic tools, markers, and reference genomes to facilitate advanced breeding programs and genetic improvement strategies for sustainable BSF production.

Genetic Management

Implementing genetically informed management systems to address inbreeding, maintain genetic diversity, and ensure long-term viability and adaptability of captive BSF populations.

Our Research Approach

Our research team employs cutting-edge genomic and computational techniques to study Black Soldier Fly populations and optimize their potential for sustainable farming applications.

Whole Genome Sequencing

We employ state-of-the-art high-throughput sequencing platforms to generate comprehensive genomic data from black soldier fly populations across multiple continents.

Bioinformatics Analysis

We utilize advanced bioinformatics pipelines for variant calling, runs of homozygosity analysis, and population structure assessment to identify patterns of inbreeding and genetic drift.

Comparative Genomics

We apply statistical and computational methods to compare wild and captive populations, revealing the genomic impact of domestication and human-mediated dispersal events.