Australian beef genetic evaluation is expanding beyond traditional individual breed boundaries with the announcement of a Multibreed Beef Genetic Evaluation Information Hub by Meat & Livestock Australia (MLA). According to MLA, the new initiative aims to address longstanding limitations in current evaluation systems by allowing commercial producers to directly compare breeding values across different cattle breeds.
Understanding the Shift to Multibreed Beef Genetic Evaluations
For more than forty years, Australia’s beef genetic evaluation system has mirrored the seedstock industry structure. According to industry analysis by Alastair Rayner, breed societies maintain herdbooks, register pedigrees, and support separate BreedPlan analyses for their respective populations. While this traditional structure has delivered substantial genetic progress within individual breeds, it often fails to match the real-world decisions made by commercial producers.
Commercial operators frequently compare bulls from several breeds, use composites, or run structured crossbreeding programs. Under current systems, a growth Estimated Breeding Value (EBV) of plus forty in one breed does not necessarily equal the same genetic merit as plus forty in another, because each breed analysis maintains its own separate genetic base. The MLA proposal is specifically designed to bridge this gap by enabling cross-breed comparisons.
TROPBEEF and TEMPBEEF Timelines and Structure
The MLA multibreed framework divides future evaluations into two distinct streams based on climate suitability. According to the announcement, TROPBEEF will incorporate nominated tropical breeds and composites, while TEMPBEEF will cover nominated temperate breeds.
Commercial release is scheduled for November 2027 for TROPBEEF, followed by TEMPBEEF in November 2028. Both programs remain in research and development and will undergo comprehensive industry review before commercialisation. Rayner notes that keeping tropical and temperate populations separate is a vital distinction, ensuring evaluations reflect the data and genetic connections established by major research initiatives like Repronomics and the Southern Multibreed Project.
Did You Know? Projects such as the Southern Multibreed Project and Repronomics have spent years demonstrating that animals from different breeds can be directly compared when managed under common environmental conditions.
Three New Selection Tools for Commercial Producers
The MLA initiative introduces three distinct categories of multibreed selection tools to give commercial producers more actionable data. According to the announcement, these tools are designed to alter how producers measure and select genetics:
- Australian Cattle Breeding Values (ACBVs): Operating similarly to current BreedPlan EBVs, ACBVs use pedigree, performance, and genomic data to predict genetic differences across breeds, herds, and environments.
- Australian Cattle Genomic Values (ACgVs): Designed for commercial producers, these genomic predictions require only that the assessed animal is genotyped, removing the need for a submitted pedigree or performance record.
- Australian Cattle Genetic Profiles (GenProfiles): This tool provides a broader genetic benchmark for a defined group or commercial herd by genotyping thirty randomly selected animals, such as a recent calf drop.
The Ongoing Role of Breed Societies and Performance Data
Multibreed evaluation does not render breed societies, pedigrees, or performance recording redundant. In fact, reliable cross-breed comparisons require more accurate identification, larger reference populations, and stronger genetic linkage. Breed societies remain the primary custodians of the pedigree and performance data necessary to build robust evaluations.
Rayner points out that while some breed societies may fully participate in the new multibreed framework, others may choose to maintain specialised single-breed evaluations. A prime example is the Australian Wagyu Association, which has successfully used detailed recording and strong commercial signals to target specific carcase traits like marbling. Ultimately, multibreed evaluation adds a new pathway without eliminating existing choices for breeders.
Frequently Asked Questions
When will the multibreed evaluations become commercially available?
According to MLA, TROPBEEF is scheduled for commercial release in November 2027, with TEMPBEEF following in November 2028.
Will current single-breed EBVs disappear?
No. Breed societies can choose whether to participate in multibreed evaluations or retain specialized single-breed evaluations based on their members’ specific breeding objectives.
Do commercial producers need to submit pedigrees to use ACgVs?
No. Australian Cattle Genomic Values (ACgVs) provide predictions for individual animals that only need to be genotyped, rather than having individual performance or pedigree records submitted.
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