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Research article - Peer-reviewed, 2022

Mating allocations in Nordic Red Dairy Cattle using genomic information

Bengtsson, Christian; Bengtsson, Christian ; Stalhammar, H.; Thomasen, J. R.; Eriksson, Susanne; Fikse, Freddy; Strandberg, Erling

Abstract

In this study, we compared mating allocations in Nordic Red Dairy Cattle using genomic information. We used linear programming to optimize different economic scores within each herd, considering genetic level, semen cost, the economic impact of recessive genetic defects, and genetic relationships. We selected 9,841 genotyped females born in Denmark, Finland, or Sweden in 2019 for mating allocations. We used 2 different pedigree relationship coefficients, the first tracing the pedigree 3 generations back from the parents of the potential mating and the second based on all available pedigree information. We used 3 different genomic relationship coefficients, 1 SNP-by-SNP genomic relationship and 2 based on shared genomic segments. We found high correlations (≥0.83) between the pedigree and genomic relationship measures. The mating results showed that it was possible to reduce the different genetic relationships between parents with minimal effect on genetic level. Including the cost of known recessive genetic defects eliminated expression of genetic defects. It was possible to reduce genomic relationships between parents with pedigree measures, but it was best done with genomic measures. Linear programming maximized the economic score for all herds studied within seconds, which means that it is suitable for implementation in mating software to be used by advisors and farmers.

Keywords

genomic relationships; pedigree relationships; mating program; linear programming

Published in

Journal of Dairy Science
2022, volume: 105, number: 2, pages: 1281-1297

Authors' information

VikingGenetics
Bengtsson, Christian (Bengtsson, Christian)
Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics
Stalhammar, H.
VikingGenet Sweden AB
Thomasen, J. R.
VikingGenetics
Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics
Växa Sverige
Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics

UKÄ Subject classification

Animal and Dairy Science

Publication Identifiers

DOI: https://doi.org/10.3168/jds.2021-20849

URI (permanent link to this page)

https://res.slu.se/id/publ/115105