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International genomic evaluation methods for dairy cattle

Code: 9781786765680
Peter Sullivan, Canadian Dairy Network, Canada

Chapter synopsis: The primary systems of data recording and genetic evaluation of dairy cattle are managed at a national level, with separate programs being run by each country, or in some cases for a small group of countries. However, international genomic evaluation methods for dairy cattle are needed so that sire evaluations can account for and estimate suitable degrees of sire re-ranking from one country to the next. This chapter compares national versus international standards and genetic versus genomic evaluation methods. The chapter highlights key points of understanding for current and future applications of international genomic evaluation of dairy cattle. Finally, the chapter looks ahead to future research trends in this area and provides detailed guidance on further reading on the subject.

DOI: 10.19103/AS.2019.0058.23
Table of contents 1 Introduction 2 Reducing equations by substitution 3 Proof deregression 4 Multiple across-country evaluation (MACE) with estimated breeding value (EBV) for one trait per country as input 5 Multiple-trait MACE (MT-MACE) 6 National genomic evaluations 7 International genomic evaluations 8 MACE with national genomic evaluations of sires as input (GMACE) 9 MACE with national genomic equations for single-nucleotide polymorphism (SNP) effects as input (SNP-MACE) 10 Comparing international genomic approaches 11 Evaluating non-genotyped animals internationally 12 Future trends and conclusion 13 Abbreviations 14 Where to look for further information 15 References

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