Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/59284
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dc.contributor.authorArcher, J Aen
dc.contributor.authorReverter, Aen
dc.contributor.authorHerd, R Men
dc.contributor.authorArthur, P Fen
dc.date.accessioned2024-05-15T04:00:27Z-
dc.date.available2024-05-15T04:00:27Z-
dc.date.issued2023-08-
dc.identifier.citationAnimal Production Science, 63(15), p. 1473-1482en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.urihttps://hdl.handle.net/1959.11/59284-
dc.description.abstract<p><b>Context.</b> Providing feed is the largest cost in beef production. Genetic variation exists in feed efficiency traits in young cattle but the genetic associations with feed efficiency traits in cows are poorly understood, but if strong and favourable, they might be used to improve feed efficiency of cows. <b>Aim.</b> To examine the phenotypic and genetic relationships among feed intake, feed efficiency, body composition and cow milk yield measured in young cattle and in cows. <b>Methods.</b> Data on 1783 young Angus, Hereford, Polled Hereford and Shorthorn bulls and heifers, and for 751 of the females as cows, were used to calculate the phenotypic and genetic relationships among feed efficiency traits, body composition and cow milk yield measured postweaning and in mature cows. The young cattle were tested for feed intake and feed efficiency at approximately 9 months of age and the females, after two calvings, were tested again as non-pregnant, non-lactating cows at approximately 4 years of age. <b>Key results.</b> At the postweaning test, the heritability estimates for feed intake, average daily gain, test weight, residual feed intake (RFI), feed conversion ratio, rump fat depth and eye-muscle area were 0.47, 0.32, 0.46, 0.42, 0.28, 0.47 and 0.20 respectively. Corresponding heritability estimates in the cow test were 0.27, 0.35, 0.74, 0.22, 0.30, 0.47 and 0.12. Heritability estimates for 400-day weight, cow 4-year weight and cow milk yield were 0.47, 0.62 and 0.15 respectively. Genetic correlations between traits measured postweaning and the same traits measured in the cow were moderate to high, and for the feed efficiency trait, RFI, was very high (0.95), close to unity. <b>Conclusions.</b> Inclusion of postweaning RFI as a selection criterion in beef cattle breeding can be expected to lead to improvement in cow feed efficiency. <b>Implications.</b> Most breeding decisions in beef cattle are based on traits measured early in life and for replacement heifers are made with an aim to improve their productivity and profitability as cows. The strong and favourable associations measured between postweaning RFI and cow RFI mean that feed efficiency measured in young cattle can be used as a selection trait to improve cow feed efficiency.</p>en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titlePhenotypic and genetic relationships for feed intake, feed efficiency, body composition and cow milk yield measured postweaning and in mature beef cowsen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN23191en
local.contributor.firstnameJ Aen
local.contributor.firstnameAen
local.contributor.firstnameR Men
local.contributor.firstnameP Fen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailrherd3@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.publisher.placeAustraliaen
local.format.startpage1473en
local.format.endpage1482en
local.peerreviewedYesen
local.identifier.volume63en
local.identifier.issue15en
local.contributor.lastnameArcheren
local.contributor.lastnameReverteren
local.contributor.lastnameHerden
local.contributor.lastnameArthuren
dc.identifier.staffune-id:rherd3en
local.profile.orcid0000-0003-4689-5519en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:1959.11/59284en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitlePhenotypic and genetic relationships for feed intake, feed efficiency, body composition and cow milk yield measured postweaning and in mature beef cowsen
local.relation.fundingsourcenoteThis work was funded by NSW Department of Primary Industries and Meat & Livestock Australiaen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorArcher, J Aen
local.search.authorReverter, Aen
local.search.authorHerd, R Men
local.search.authorArthur, P Fen
local.uneassociationYesen
local.atsiresearchNoen
local.sensitive.culturalNoen
local.year.published2023en
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/4f4a6eab-6f97-4377-845e-1ac2ba61fdbden
local.subject.for2020300305en
local.subject.for2020300301en
local.subject.seo2020tbden
local.codeupdate.date2024-07-02T13:40:45.407en
local.codeupdate.epersonrherd3@une.edu.auen
local.codeupdate.finalisedtrueen
local.original.for20203003 Animal productionen
local.original.seo2020tbden
local.profile.affiliationtypeExternal Affiliationen
local.profile.affiliationtypeExternal Affiliationen
local.profile.affiliationtypeUNE Affiliationen
local.profile.affiliationtypeExternal Affiliationen
local.date.moved2024-05-15en
Appears in Collections:Journal Article
School of Environmental and Rural Science
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