The Brazilian Nelore system, properly modelled.

Brazil runs the world's largest commercial beef herd — 220 million head, ~80% Bos indicus — through a production model that doesn't match any temperate template. Extensive Cerrado grazing, novilho precoce yearling finishing, frigorífico boi gordo grids, DEPs published by ABCZ. Most platforms force this through a temperate-shaped lens. Genemap doesn't.

What's different about Brazil.

Four structural facts about the Brazilian beef system shape how the bioeconomic engine has to be re-weighted to model it correctly. Producers and analysts familiar with US, AU or EU systems will recognise some of these and find others surprising.

• Bos indicus, not Bos taurus. ~80% of the national herd is zebu — predominantly Nelore (90% of the zebu fraction), with smaller Tabapuã, Guzerá, Gir, Brahman and Indubrasil contributions. The Bos taurus heritabilities published in Henderson / VanRaden / Hayes-Bowman are not directly applicable; ABCZ (Associação Brasileira dos Criadores de Zebu) maintains a separate evaluation pipeline with zebu-specific genetic parameters and reference populations.
• The trait notation is DEPs, not EBVs. Brazilian breed-society evaluations publish Diferenças Esperadas na Progênie — DEPs — which are arithmetically equivalent to US EPDs (transmitting ability of the parent ÷ 2) rather than AU EBVs (the animal's own breeding value). The platform's translator layer handles this — see the AI translator architecture piece — but the underlying semantic distinction matters for producers reading reports from multiple countries.
• Tropical adaptation traits are first-order economic drivers. Tick resistance, heat tolerance and parasite resistance carry serious economic weight in Brazil that they don't carry in temperate systems. Burrow (2012) and Frisch & Vercoe (1984) document the genotype-environment interaction; the platform exposes these traits as full evaluation axes for Brazilian producers, weighted appropriately by the bioeconomic anchor.
• The grid economics are different. The Brazilian boi gordo market (CEPEA-ESALQ daily indicator) pays differently from MSA-grid AU or USDA Choice/Prime US. The novilho precoce premium — for finished animals slaughtered before 24 months — is a structural feature of Brazilian processor contracts that doesn't have a direct temperate analogue.

Trait terminology, side by side.

The same biological signal is named different things across the world's evaluation systems. The translator resolves them; here's the canonical mapping for the Brazilian audience.

Two things worth flagging. First, the Bos indicus tick-resistance trait (Carrap.) is genuinely a Brazilian-specific evaluation axis with no temperate counterpart — the trait exists in zebu populations, has h² ≈ 0.25, and matters enormously to producer economics on the Cerrado. Second, IPP (Idade ao Primeiro Parto) is the canonical Brazilian fertility axis and is materially different from AU DTC in how it's measured and selected on, even though they capture overlapping biology.

The novilho precoce premium.

The biggest structural difference between the Brazilian system and any temperate beef system is the novilho precoce contract. Frigoríficos pay a premium — typically R$5 to R$15 per arroba above the spot boi gordo indicator — for steers finished before 24 months of age, with formal certification (programa novilho precoce) in several states including Mato Grosso do Sul, Goiás and São Paulo.

That single grid feature reshapes the trait-weight profile. The bioeconomic anchor for a novilho precoce producer puts heavier weight on early growth (P210, P365) and lower mature size (PS Vaca), because the producer's gross margin per head improves materially with faster finish. The platform's production-system modifier for "Brazilian novilho precoce" automatically applies this re-weighting; producers running a longer-cycle traditional system see a different weight profile from the same base DEPs.

What that looks like on a real-shape fazenda.

The numbers below are derived from a real-shape Mato Grosso do Sul cow-calf-yearling operation — 4,500 Nelore breeding females, predominantly novilho precoce contracts with Frigorífico Marfrig, supplementary mineral protein on Brachiaria brizantha pasture, finishing at ~16 months / 510 kg liveweight.

The pattern is consistent: growth-stack DEPs are pulling harder, mature-size penalties are steeper, fertility (IPP) is pulling harder, and marbling is pulling less. Anyone familiar with US cow-calf bioeconomics would expect roughly the opposite weighting on every line — that's the point. The same bull's DEP report produces a very different ranking on this fazenda's selection objective than it would on a US Choice-Prime grid operation.

The DEPs are right. The translator works. The production system modifier is right. The producer's own kill data tightens it further. Four layers, one Brazilian breed-society report turned into a Brazilian producer's per-bull dollar value.

What's wired natively for Brazil.

As of May 2026, the platform reads the following Brazilian sources natively (Tier 1 ingestors; no AI translator in the loop for these):

• ABCZ DEPs — Nelore, Tabapuã, Guzerá, Gir, Indubrasil. Read directly from the Sumário ABCZ publications.
• Geneplus / EMBRAPA evaluations — for commercial-cross herds and crossbred programmes.
• CEPEA-ESALQ boi gordo daily indicator — the canonical Brazilian fat-steer price, pulled overnight in BRL, converted to USD via daily ECB FX.
• INMET climate — Instituto Nacional de Meteorologia daily temperature, rainfall and humidity for each producer's nearest station, with NASA POWER satellite fallback for remote Cerrado locations.
• BR carbon market (voluntary) — ABS Brasil and other domestic offset registries, pulled daily as part of the methane economics layer.

Tier 2 (AI translator) handles a handful of less common Brazilian breed-society evaluations — Guzerá-Leite, Pardo-Suíço Corte and smaller composite breed evaluations — until a Tier 1 ingestor moves them across in Q4 2026 (see the roadmap).

Where the platform can go further for Brazilian producers.

Two areas where Brazilian producers can get value the engine doesn't fully surface yet, both on the H2 2027 horizon:

• Composite-aware ranking. A substantial fraction of commercial Brazilian herds run F1 (Nelore × Angus, Nelore × Hereford) or higher crosses. The cross-species composite genomic prediction work on the 2027 horizon is directly applicable here — pure DEPs from ABCZ, US EPDs from IGS, and the composite animal's own genotype, all ranked on the same per-farm bioeconomic axis.
• Microbiome × feed efficiency for tropical forages. The rumen microbiome literature is dominated by temperate forage studies. Difford et al. (2018) on temperate ryegrass is the canonical reference; the picture on Brachiaria brizantha and Panicum maximum is much thinner. Genemap maintains the infrastructure to ingest microbiome panels per producer (see methane economics); academic teams running tropical-forage microbiome work can use the platform as their phenotype-side anchor.