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DairyTalk 229: Reading the Genomic Datasheet: What RZG Measures - and Why ZW² Matters - by Helmut Demmelhuber
The genomic datasheet is not a marketing claim but a technical decision-making tool. This article explains why RZG is not a fixed score, but a relative index that shifts over time as the national genetic base improves. Particular attention is given to the ZW² value, currently the most accurate breeding value estimate, as it combines genomic information, pedigree data, and offspring performance where available. The text clearly differentiates between performance indices that aggregate multiple traits and genetic markers that flag specific characteristics or risks. The key message is clear…
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