Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4160
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dc.contributor.authorJohnston, Daviden
dc.contributor.authorBrown, Danielen
dc.contributor.authorGraser, Hans Ulrichen
local.source.editorEditor(s): AAABG: Association for the Advancement of Animal Breeding and Geneticsen
dc.date.accessioned2010-01-18T09:44:00Z-
dc.date.issued2007-
dc.identifier.citationProceedings of the Association for the Advancement of Animal Breeding and Genetics, v.17, p. 344-347en
dc.identifier.isbn1921208139en
dc.identifier.issn1328-3227en
dc.identifier.urihttps://hdl.handle.net/1959.11/4160-
dc.description.abstractIn BREEDPLAN analyses, contemporary groups for birth weight and 200d weight are sliced at 45 day intervals to avoid possible inaccuracies in age adjustment, rapid changes in environmental conditions and confounding of sires and seasons biasing the estimated breeding values. However age slicing can have a significant impact on data structure and effectiveness of records. The aim of this study was to re-estimate the variance components and examine the effectiveness of the data for birth and 200day weights from Angus cattle with different contemporary group slicing intervals. The result showed that altering the slicing interval from 15 to 60 days did not have a significant impact on the variance components for birth or 200day weight. However increasing slice interval significantly improved the average effectiveness of the data for both traits. On average the animal record effectiveness increased by 10% and the average total effective progeny records per sire more than doubled. The results suggest that the age slicing interval could be altered from 45 to 60 days to increase the effectiveness of the data available without impacting on the genetic parameters. However altering the contemporary group structure will cause changes to the existing estimated breeding values.en
dc.languageenen
dc.publisherAssociation for the Advancement of Animal Breeding and Genetics (AAABG)en
dc.relation.ispartofProceedings of the Seventeenth Conference for the Advancement of Animal Breeding and Geneticsen
dc.titleThe effect of age slicing interval on the variance components and data effectiveness for birth and 200 day weights in Angus cattleen
dc.typeConference Publicationen
dc.relation.conferenceAAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Geneticsen
dc.subject.keywordsQuantitative Genetics (incl Disease and Trait Mapping Genetics)en
local.contributor.firstnameDaviden
local.contributor.firstnameDanielen
local.contributor.firstnameHans Ulrichen
local.subject.for2008060412 Quantitative Genetics (incl Disease and Trait Mapping Genetics)en
local.subject.seo2008830301 Beef Cattleen
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.emaildjohnsto@une.edu.auen
local.profile.emaildbrown2@une.edu.auen
local.profile.emailhgraser@une.edu.auen
local.output.categoryE1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordpes:5276en
local.date.conference23rd - 26th September, 2007en
local.conference.placeArmidale, Australiaen
local.publisher.placeArmidale, Australiaen
local.format.startpage344en
local.format.endpage347en
local.peerreviewedYesen
local.identifier.volume17en
local.contributor.lastnameJohnstonen
local.contributor.lastnameBrownen
local.contributor.lastnameGraseren
dc.identifier.staffune-id:djohnstoen
dc.identifier.staffune-id:dbrown2en
dc.identifier.staffune-id:hgraseren
local.profile.orcid0000-0002-4995-8311en
local.profile.orcid0000-0002-4786-7563en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:4260en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleThe effect of age slicing interval on the variance components and data effectiveness for birth and 200 day weights in Angus cattleen
local.output.categorydescriptionE1 Refereed Scholarly Conference Publicationen
local.relation.urlhttp://trove.nla.gov.au/work/35062558?selectedversion=NBD42373479en
local.relation.urlhttp://www.aaabg.org/livestocklibrary/2007/johnston344.pdfen
local.conference.detailsAAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Genetics, Armidale, Australia, 23rd - 26th September, 2007en
local.search.authorJohnston, Daviden
local.search.authorBrown, Danielen
local.search.authorGraser, Hans Ulrichen
local.uneassociationUnknownen
local.conference.venueUniversity of New Englanden
local.year.published2007en
local.date.start2007-09-23-
local.date.end2007-09-26-
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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