Short communication: Animal-level factors associated with whether a dairy female is mated to a dairy or beef bull

Journal of Dairy Science
D P Berry, S C Ring

Abstract

When serving a female, the producer must decide whether to mate her to a dairy or beef bull. Tools assisting in this decision could be a useful component of the decision process. A database of 2,283,100 artificial inseminations from 806,725 dairy females was used to investigate what factors were associated with servicing a given female to a beef bull. The probability of being inseminated with a beef bull increased with each service and as the breeding season progressed. An older cow had greater odds of being served with a beef bull, as did cows that calved later in the year, had recently experienced dystocia, were a longer time calved, or were of a poor overall genetic merit compared with herdmates. Cows with low somatic cell count in the previous lactation compared with herdmates were less likely to be mated to a beef bull, as were cows that yielded relatively higher milk solids in the previous lactation. Relative to a first-parity cow, the odds of a fifth-parity cow being mated to a beef bull were 1.35, whereas those of a tenth-parity cow were 2.11. The odds of a female in the worst 10% for total genetic merit being mated to a beef bull were 2.90 times those of a female in the top 10%. Although dystocia was associated with th...Continue Reading

References

Oct 15, 2013·Journal of Dairy Science·C SunD Gianola
Apr 1, 2014·Animal : an International Journal of Animal Bioscience·G E Seidel
Apr 8, 2014·Animal : an International Journal of Animal Bioscience·D P BerryJ E Pryce
Mar 22, 2015·Journal of Dairy Science·M M KelleherD P Berry
Nov 7, 2017·Journal of Dairy Science·J B Cole, P M VanRaden
Nov 21, 2017·Journal of Dairy Science·J R RocheK L Macmillan
Oct 1, 2018·Journal of Dairy Science·D P BerryA R Cromie
Jun 24, 2019·Journal of Dairy Science·T R CarthyD P Berry
Sep 10, 2019·Journal of Dairy Science·D P BerryF Hely
Dec 2, 2019·Journal of Dairy Science·D P BerryR D Evans
Jul 27, 2020·Translational Animal Science·Michelle M JudgeDonagh P Berry

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