Researchers Link Gene to Sex Reversal in River Prawns
A new study identifies how MnNLRP2 gene expression influences sex determination and development in Macrobrachium nipponense.
Updated on Oct. 30, 2026 in Life Sciences
Researchers have discovered that the MnNLRP2 gene plays a critical role in sex reversal and mitochondrial health within the Oriental river prawn. By inducing feminization with 17β-estradiol, scientists mapped the cellular changes that drive sex-specific gonad development.
Why it matters
Understanding the genetic and cellular mechanisms of sex determination in crustaceans offers vital insights for improving aquaculture breeding efficiency. This research provides a framework for manipulating sex ratios to optimize yields in commercial prawn farming.
Using single-cell RNA sequencing and RNA interference, the study revealed that oxidative phosphorylation is a consistently altered pathway in sex-reversed prawn gonads. The gene MnNLRP2 was found to be testis-enriched and specific to primary spermatocytes.
The players
Macrobrachium nipponense
Known as the Oriental river prawn, this crustacean is a significant species in global aquaculture breeding programs.
MnNLRP2
This gene is identified as a key regulator in sex-specific development and mitochondrial function within the river prawn.
The details
The research team fed post-larval males 17β-estradiol, successfully producing neo-females that developed ovary-like gonads. While single-cell profiling showed an enrichment of early germ cells in these neo-females, mature oocytes and spermatozoa were significantly depleted.
Timeline
October 30, 2026: Article publication.
The Big Picture
This study extends the goals of the aquaculture genome sequencing initiative by detailing the genetic control of sexual dimorphism. The findings mark a shift toward targeted genetic intervention in crustacean production.
These findings could lead to more stable sex ratios in farmed prawn populations, potentially increasing aquaculture output and commercial viability. Future applications might include refined breeding protocols that reduce the reliance on external hormonal treatments.
The takeaway
The study demonstrates that sex in these prawns is highly plastic and governed by specific genetic switches like MnNLRP2. Controlling these genes could eventually allow breeders to produce all-female or all-male populations to meet market demands.
Further reading
For more on genetic developments, visit our Life Sciences section.
More information
Access the full findings in the peer-reviewed research article.
Source note: This article includes information reported by Nature.
