Sign in Subscribe
Agriculture

Gut Microbiome Composition in Fruit Flies Varies by Species and Sex

Strategic Insights

— 2 min read

A recent study published in BMC Microbiology has shed new light on the complex relationship between insect gut microbiomes and their hosts. The research team, led by Sayaka Aoki from the Tropical Pest Genetics and Molecular Biology Research Unit, explored the impacts of host species and sex on the gut microbiome of four laboratory-reared fruit fly lines. The findings suggest that while host species plays a significant role in shaping the gut microbiome, sex also has a noticeable impact, but its magnitude differs between hosts.

Key Takeaways:

  • The study evaluated the gut microbiome of four fruit fly species: Bactrocera dorsalis, Bactrocera latifrons, Ceratitis capitata, and Zeugodacus cucurbitae.
  • The research used near full-length 16S rRNA sequencing with a PacBio Kinnex concatenation-based approach to analyze the gut microbiome of male and female fruit flies from each species.
  • The results showed a clear impact of fruit fly species on the gut microbiome composition, with distinct microbiomes observed between species.
  • For three of the four species, sex was found to have a significant influence on the gut microbiome composition, with males and females having different ASV (amplicon sequence variant) compositions.
  • However, the study also found that there was no characteristic male or female microbiome across all cases, suggesting that the impact of sex may be context-dependent.
  • The use of near full-length 16S rRNA sequencing did not significantly improve beta-diversity interpretation over traditional V4 subunit sequencing, but did allow for improved taxonomic classification at the genus level.

Statistics:

  • The study analyzed the gut microbiome of 192 fruit flies (48 individuals per species and sex group).
  • The research found that the gut microbiome composition was significantly influenced by host species F(3, 170) = 4.55, p-value < 0.01.
  • The study also found that sex had a significant impact on the gut microbiome composition for three of the four species (B. dorsalis, B. latifrons, and C. capitata).
  • The coefficient of variation (CV) for the number of ASVs (amplicon sequence variants) detected per sample was 22.1%, indicating moderate variation in the gut microbiome composition.

Sources:

  • Aoki, S. et al. (2025). Effects of species and sex on the gut microbiome of four laboratory-reared fruit fly lines (Diptera: Tephritidae) using full-length 16S rRNA PacBio Kinnex sequencing. BMC Microbiology, 25(1):1-14. (BMC Microbiology - http://www.biomedcentral.com/bmcmicrobiol/)
  • NewsRx. Researchers at Department of Agriculture Agricultural Research Service Have Published New Data on Microbiology [Effects of species and sex on the gut microbiome of four laboratory-reared fruit fly lines (Diptera: Tephritidae) using full-length ...]. Life Science Weekly. September 2, 2025; p 5099.

Read more