UQ Breakthrough: New Genetic Test Advances Hornless Cattle Breeding in Australia

The University of Queensland's Latest Advance in Livestock Genetics

Australian cattle producers stand to gain significantly from a groundbreaking genetic test developed by researchers at the University of Queensland (UQ). This innovation, known as the Guarani poll test, promises to enhance the accuracy of breeding hornless or polled cattle, particularly in Bos indicus breeds like the Brahman, which dominate northern Australia's beef industry. By identifying a specific hornless genetic variant previously undetected by commercial tests, UQ's work addresses longstanding challenges in livestock improvement and animal welfare.

The test emerges from collaborative efforts at UQ's Queensland Alliance for Agriculture and Food Innovation (QAAFI), a joint initiative between UQ and the Queensland Department of Primary Industries. It represents a pinnacle of applied genomics research, translating academic discoveries into practical tools for industry. As Australia's beef sector eyes record production of nearly 3 million tonnes carcase weight in 2026, with a national herd exceeding 30 million head, such advancements underscore the vital role universities play in sustaining economic and sustainable agriculture.

Why Horns Pose Challenges in Australian Beef Production

Horns in cattle, while natural in many breeds, create substantial hurdles for modern farming. In feedlots, transport, and handling, they lead to injuries among animals and workers alike. The Australian beef industry incurs bruising losses estimated at $20 to $30 million annually, largely attributable to horns. Dehorning, the standard practice, involves painful procedures on calves, resulting in stress, weight loss, and occasional mortality rates of 2 to 4 percent post-procedure.

For Bos indicus cattle like Brahman—adapted to Australia's tropical north and comprising a significant portion of the export-oriented herd—the genetics of polledness are particularly complex. Traditional dehorning is labor-intensive and welfare-concerning, prompting a shift toward genetic selection for naturally hornless animals. Yet, until now, commercial DNA tests detected only two of four known polled alleles: Celtic (PC) and Friesian (PF). This gap left producers uncertain, often misclassifying polled carriers as horned.

UQ Researchers Uncover the Missing Piece: The Guarani Poll Variant

Led by Associate Professor Elizabeth Ross at QAAFI's Gatton Campus, UQ scientists employed advanced long-read sequencing technology to reveal the Guarani (PG) and Mongolian (PM) polled variants in Australian Brahman herds. The breakthrough came from analyzing DNA from four Queensland herds, including those owned by Consolidated Pastoral Company (CPC), where the PG allele appeared in three.

"We know the Pg allele is out there in the Australian Brahman population because we found it directly," Dr Ross explained. This variant, first identified in Brazilian cattle in 2019 by Utsunomiya et al. and named after the Guarani aquifer, evaded standard short-read tests due to its structural complexity. UQ's validation across breeding programs confirms its presence Down Under, enabling precise genotyping.

Complementing this, Dr Imtiaz Randhawa from UQ's School of Veterinary Science has pioneered polled genetics research. His publications, including optimized SNP panels for multi-breed testing and simulations of polled introgression, laid foundational work. Together, their efforts bridge genomics and practical breeding.

How the Guarani Poll Test Works and Its Precision

The Guarani poll test targets the PG mutation on chromosome 1, distinguishing homozygous polled (PP), heterozygous (Pp), and horned (pp) animals. Offered by Neogen Australasia—licensed through UQ's UniQuest—it integrates as an add-on or standalone to genomic profiles, available from May 2026 for Australian Brahman Breeders Association (ABBA) members.

Unlike prior assays missing PG and PM, this panel covers all four alleles, resolving ambiguities in up to 20 percent of cases. Early validation shows high accuracy, empowering breeders to select reliably for polled traits without surprises in progeny.

Spotlight on UQ's Trailblazing Researchers

Dr Elizabeth Ross, a genomicist at QAAFI, spearheads cattle trait mapping, from Brahman fertility to heat tolerance. Her team's long-read sequencing prowess uncovered elusive variants, building on prior work like epigenetic clocks for cattle aging. QAAFI, with its DPI partnership, exemplifies UQ's translational research model.

Dr Imtiaz Randhawa complements with expertise in selection signatures and gene editing simulations for polled introgression. Over 70 publications, including Frontiers in Genetics on editing vs. breeding speed, position UQ as a polled genetics leader. Their interdisciplinary approach—genomics, bioinformatics, field validation—highlights higher education's role in ag innovation.

UniQuest's commercialization arm facilitated Neogen's launch at ABBA's Airlie Beach conference, showcasing UQ's ecosystem from lab to paddock. UQ's announcement details the journey.

Photo by matxi on Unsplash

Transforming the Australian Beef Sector: Welfare and Economic Gains

Polled herds slash dehorning needs, cutting calf stress and losses (up to 4% nationally). Worker safety improves—no horn gouges—and bruising drops, saving $20-30M yearly. For Brahman producers, feedlot premiums rise as polled cattle fetch higher prices.

• Safety: Reduced injuries to handlers (horns cause deep wounds, eye damage).
• Welfare: Avoids painful disbudding; aligns with RSPCA standards.
• Economics: Labor savings; premium markets (e.g., EU welfare-focused buyers).
• Productivity: Less weight loss post-procedure; better group housing.

With Australia's 2026 beef exports projected at 2.3M tonnes, polled genetics bolster competitiveness. ABBA's endorsement signals adoption surge.

From Lab to Land: UQ's Commercialization Success

UniQuest licensed the IP to Neogen, enabling rapid market rollout. CEO Dr Dean Moss noted, "UQ research drives real producer confidence." Neogen's Hannah Bourke praised the partnership for industry-relevant tools.

This mirrors UQ's track record: Animal Genetics Lab has delivered tests for buffalo fly resistance and fertility. QAAFI's $100M+ funding fuels such impacts, training PhDs like Harrison Lamb in bovine genomics.

UQ's Broader Contributions to Livestock Improvement

Polled research fits UQ's portfolio: fertility EBVs, heat tolerance, methane reduction. Collaborations with CPC and ABBA exemplify public-private synergy. Dr Randhawa's MLA-funded projects optimized SNP panels, resolving 1999 ambiguous cases.

As climate pressures mount, UQ's genomics tackles northern challenges—tick resistance, pasture efficiency. This positions Queensland unis as ag powerhouses amid $15B industry value.

Stakeholder Perspectives: Breeders and Industry Leaders

CPC CEO Troy Setter hailed the Mongolian variant find: "Improves welfare and performance." ABBA breeders, facing tropical horns prevalence, anticipate faster polled fixation.

Vet groups advocate genetic solutions over dehorning, citing ethical shifts. Economists project ROI: polled herds recoup test costs (~$20-50/head) via premiums and savings.

Future Outlook: Expanding Polled Breeding Horizons

With full allele coverage, Australia nears horn-free herds. Gene editing simulations suggest 10-20 year fixation via conventional breeding; CRISPR could halve it. UQ eyes multi-trait indices, integrating polled with growth, fertility.

Global ripple: Export to Brazil, where Guarani originated. UQ's lab scales testing, training industry vets in genomics.

Photo by Pascal van de Vendel on Unsplash

UQ's Enduring Legacy in Australian Higher Education and Ag Research

This test exemplifies UQ's impact: 2026 rankings affirm vet/ag leadership. QAAFI graduates fill DPI, industry roles, perpetuating innovation. As beef faces welfare scrutiny, UQ equips future leaders for sustainable livestock improvement.

Prospective students eye vet science, genomics—fields blending academia, enterprise. UQ's model inspires national unis, fostering $2B+ R&D ecosystem.