The handheld device developed by Oxford Nanopore enables rapid, real-time genetic analysis directly at points of control, setting new standards for traceability, commercial integrity and biodiversity protection.
A device roughly the size of an old flip phone, plugged into a laptop via USB-C and capable of reading DNA in real time. This is the MinION, Oxford Nanopore Technologies’ portable sequencer that is changing how genetic analyses and authenticity checks are performed on plant and animal species. Being able to bring sequencing directly to inspection sites – customs, airports, fish markets, mobile labs – drastically reduces the time, cost and distance between sampling and interpretation.
As Valentina Verduci, a PhD candidate at the University of Milano-Bicocca, explains, MinION’s power lies not only in its miniature hardware but in immediate access to genetic information: the sequence “scrolls” across the screen as it is generated. This real-time visibility enables work in extreme environments, on degraded or processed samples, and on large volumes of data that would normally require a fully equipped laboratory.
What began as a specialist molecular technique is now becoming a practical tool for research, biodiversity monitoring and the fight against commercial fraud.
TAKEAWAYS
An innovation long in the making
To understand the scale of the transformation introduced by MinION, a brief historical perspective is useful. In the late 1970s, Frederick Sanger developed the method that eventually enabled sequencing of the human genome – a remarkable achievement that took thirteen years and billions of dollars, largely because the technology could sequence only one molecule at a time. In the early 2000s, Next Generation Sequencing introduced massive parallel processing, dramatically reducing time and cost, though the equipment remained large and laboratory bound.
Third-generation platforms like MinION changed the paradigm again: much longer reads, high throughput and, crucially, portability. “You can literally put this small device in your backpack and take it anywhere,” Verduci notes. Its performance has been demonstrated in extreme settings: aboard the International Space Station in 2016 to analyze microbial communities in microgravity; in the Amazon rainforest, where it identified more than 99% of species in a single sampling event; and in Antarctica’s Dry Valleys, where it functioned flawlessly below freezing and without internet connectivity. From the Gobi Desert to remote glaciers, the technology shows an operational resilience that makes sequencing possible where it previously wasn’t.
Space and time, both compressed
Real-time data availability fundamentally changes how sequencing work is conducted. “You can stop the run as soon as you have enough data, without waiting for the cycle to finish,” Verduci explains. This is a major advantage for field operators, who can adjust sampling strategies, verify sample quality and optimize analyses while they are still in progress.
Traditional Sanger-based barcoding remains appropriate for small batches and short fragments, but when sample numbers rise or when analyses must be performed far from a lab, MinION becomes the preferred option. Verduci’s work illustrates this breadth of application: developing a molecular platform for Italy’s native flora; sequencing degraded historical herbarium samples – where fragmented DNA makes long-read technologies indispensable; and monitoring marine communities in Sicily using both collected organisms and environmental DNA filtered from seawater.
In high throughput monitoring contexts, such as routine surveys in Canada, the reduction in cost and processing time is substantial.
Why fraud becomes economically unsustainable
Applications beyond academic research are already well established. “In some airports, the device is used to check illegally traded bushmeat; in Africa it has been used on the ground during Ebola outbreaks and other epidemics,” Verduci notes.
Ease of use is a decisive factor: plug it into a laptop, follow a streamlined workflow, and it’s operational broadening the range of professionals who can deploy it.
Its ability to sequence degraded or processed DNA opens additional opportunities. “It works very well on finished wood products, powdered spices and museum specimens,” she adds. It can also detect epigenetic modifications, a capability absent in earlier technologies.
The real bottleneck is no longer generating sequences but having complete, validated reference databases against which to compare them. “Without a certified sequence for comparison, even the most advanced sequencer is blind,” Verduci emphasizes. European and national initiatives are currently developing libraries for spices, CITES-listed timbers, fraud-prone fish species and priority invasive species.
Once these libraries are complete, the workflow will become extremely fast: a few milligrams of sample, quick extraction, loading onto the flow cell and results within one to three hours. Analysis costs are already lower than those of traditional platforms, and each new chemistry – released roughly every 12-18 months – boosts accuracy and yield.
Several European ports have already acquired portable sequencing equipment with the aim of shifting from random checks to systematic, preventive screening of high-risk goods such as bluefin tuna, saffron, luxury woods, caviar and protected orchids. “Imagine a suspicious container,” Verduci says. “Within two hours you know whether it really contains bluefin tuna or a cheaper species, whether saffron has been adulterated with safflower, or whether a piece of furniture is made of illegal rosewood. Fraud quickly becomes economically irrational.”
A step forward for DNA Barcoding
With standardized protocols, certified databases and trained personnel, turnaround times will reliably fall below two hours. At that point, DNA barcoding will no longer be perceived as an academic niche, but as a routine tool for supply-chain control – a practical component of biodiversity protection, commercial compliance and food safety, much like other rapid-screening instruments used today.
“After sequencing in microgravity, on ice sheets and in the rainforest,” Verduci reflects while holding the MinION in her palm, “this hundred-gram device could soon become standard equipment in customs offices worldwide, reading – one base at a time – what a shipment truly contains.”
What lies ahead is greater transparency in global trade flows: not a dramatic technological revolution, but a steady, pragmatic evolution that makes deception harder and verification easier across international supply chains.
