UFMS launches genetic biobank from roadkill to save endangered species

On a Thursday morning in June, researchers from the Federal University of Mato Grosso do Sul collected tissue samples from a tapir and a giant anteater, both freshly killed on BR-262, a highway cutting through the state's interior. The animals were dead, but their genetic material was not. That material—cells harvested from ear cartilage, resistant to decay—would be frozen in liquid nitrogen and stored indefinitely in the university's genetic bank, waiting for a future when science might know how to use it.

Each animal that dies on a Brazilian highway represents more than a single loss. It is the erasure of a unique genetic combination, a set of traits and adaptations that took generations to accumulate and that cannot be recovered once the animal is gone. Thyara de Deco Souza e Araujo, a professor of animal reproduction at UFMS and director of the Reprocon institute, explains the logic plainly: when an animal dies, its genetics die with it. It will never reproduce again. And those genes might have been crucial to the species' survival.

The biobank operates on a principle borrowed from finance. Store what you have while you have it, so you can use it when you need it. If material is not preserved now, it may not exist when the technology to use it finally arrives. In the Reprogen laboratory at UFMS, tissue samples undergo a process of cellular cultivation. Researchers multiply fibroblasts—cells that form connective tissue—and then freeze them in liquid nitrogen, where they can remain viable for an indefinite period. The bank currently holds genetic material from more than 114 jaguars, collected from animals across all five Brazilian biomes: the Amazon, Cerrado, Pantanal, Atlantic Forest, and Caatinga. It also contains samples from tapirs, anteaters, and the rarest specimens in the collection—tissue from the northern muriqui, a primate of the Atlantic Forest so critically endangered that fewer than 400 individuals remain in the wild.

The problem the biobank addresses extends beyond simple mortality. Habitat fragmentation caused by highways, cities, and human development isolates animal populations, cutting them off from genetic exchange with distant relatives. When populations shrink and become isolated, animals begin to breed with close relatives. This inbreeding reduces genetic diversity and creates cascading problems: reproductive failures, the emergence of genetic diseases, reduced capacity to adapt to environmental change. A species weakened by inbreeding becomes more vulnerable to everything—drought, disease, competition. The biobank is not a solution to this problem; it is a hedge against it, a way to preserve genetic variation that might otherwise vanish.

The technology to use this material remains largely theoretical. Assisted reproduction techniques have advanced for some domestic species, but for wild animals, the science is still developing. Each species requires its own protocols, its own carefully calibrated procedures. Researchers cannot wait for the technology to mature before collecting material. By the time the techniques are ready, the animals may be gone. The example researchers cite is the black-footed ferret in the United States. Genetic material collected from dead animals in the 1980s was used decades later to reintroduce genetic diversity into a captive population that had become dangerously inbred. The material had been waiting, frozen and patient, for the moment when it would be needed.

But Araujo and her colleagues are careful to emphasize what the biobank cannot do. It cannot replace habitat protection. It cannot substitute for maintaining healthy wild populations or reducing the threats that kill animals on highways. A genetic bank is one tool among many, and not the primary one. The fundamental work remains what it has always been: protecting forests and grasslands, maintaining corridors so animals can move and breed across landscapes, reducing the roads and development that fragment their world. The biobank is insurance, not salvation. Each animal that dies on BR-262 represents a double loss—the loss of a living creature and the loss of a genetic legacy that might have secured the species' future. In August, Campo Grande will host the Third International Symposium on Reproductive Biotechnologies for Wildlife Conservation, bringing together Brazilian and international researchers to discuss how these emerging tools might fit into a broader conservation strategy. The conversation, it seems, has only just begun.