Service Sire Effects on Body Condition Score, Milk Production, and Rebreeding of Mixed-Aged Dairy Cows Bred to Angus and Hereford Bulls—A Case Study in New Zealand

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dc.citation.issue4
dc.citation.volume2
dc.contributor.authorColeman L
dc.contributor.authorBack P
dc.contributor.authorBlair H
dc.contributor.authorLópez-Villalobos N
dc.contributor.authorHickson R
dc.contributor.editorMeyer U
dc.date.accessioned2024-06-11T23:26:42Z
dc.date.available2024-06-11T23:26:42Z
dc.date.issued2021-12-01
dc.description.abstractBeef-breed bulls are used in dairy herds to produce a calf of greater value for finishing than calves sired by dairy bulls. There is limited research about which beef-breed bulls are most appropriate, and whether any negative impact on cow performance in terms of milk production and rebreeding should be considered. The aim of this case study was to compare the body condition score, milk production, and rebreeding performance of mixed-aged dairy cows bred to a selection of Angus and Hereford beef-breed bulls. Body condition score, post-calving live weight, milk production, rebreeding performance, and survival of 952 mixed-aged dairy cows artificially bred to 65 Angus and Hereford bulls were compared. There was no effect of service sire on post-calving live weight, days in milk, milk production, or inter-calving intervals of mixed-aged cows. Service sire had an effect on the calving day due to differences in gestation length (p < 0.001), although this did not translate into an effect on days in milk. A longer gestation length negatively influenced pregnancy rates, and greater birth weight of the calf negatively influenced survival to rebreeding (p < 0.05), indicating the potential for an effect of service sire. Selection of beef-breed service sires for dairy cows should include emphasis on lighter calves and shorter gestation lengths. The general absence of the service sire effect on the parameters measured in this study indicated that any of the service sires used in this experiment would be appropriate for use over dairy cows.
dc.description.confidentialfalse
dc.edition.editionDecember 2021
dc.format.pagination637-648
dc.identifier.citationColeman L, Back P, Blair H, López-Villalobos N, Hickson R. (2021). Service Sire Effects on Body Condition Score, Milk Production, and Rebreeding of Mixed-Aged Dairy Cows Bred to Angus and Hereford Bulls—A Case Study in New Zealand. Dairy. 2. 4. (pp. 637-648).
dc.identifier.doi10.3390/dairy2040049
dc.identifier.eissn2624-862X
dc.identifier.elements-typejournal-article
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69787
dc.languageEnglish
dc.publisherMDPI (Basel, Switzerland)
dc.publisher.urihttps://www.mdpi.com/2624-862X/2/4/49
dc.relation.isPartOfDairy
dc.rights(c) 2021 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject: beef-cross-dairy
dc.subjectdairy beef
dc.subjectdairy
dc.subjectmilk production
dc.subjectrebreeding
dc.subjectbody condition score
dc.subjectservice sire
dc.titleService Sire Effects on Body Condition Score, Milk Production, and Rebreeding of Mixed-Aged Dairy Cows Bred to Angus and Hereford Bulls—A Case Study in New Zealand
dc.typeJournal article
pubs.elements-id459857
pubs.organisational-groupOther
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