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This short review discusses genomic evaluations for crossbreed dairy cattle from a New Zealand perspective. I briefly introduce the cow population and farm systems that have resulted in high crossbreeding rates and provide a short history of across-breed genetic and genomic evaluations used in New Zealand since 1996. I provide implementation details for the current across-breed single-step marker model (SSMM), including data sizes, solving methods, and how to account for multiple breed and breed crosses, along with a summary of the validation results. Finally, I outline future research areas that are being undertaken to improve our across-breed genomic evaluation.
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B.L. Harris
JDS Communications
Livestock Improvement Corporation
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B.L. Harris (Thu,) studied this question.
www.synapsesocial.com/papers/69fff55cb124fe581985b4e9 — DOI: https://doi.org/10.3168/jdsc.2021-0176