Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/2420
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dc.contributor.authorWorsnop, Christopher Daviden
dc.contributor.authorJohnston, Daviden
dc.contributor.authorGraser, Hansen
dc.date.accessioned2009-09-17T13:02:00Z
dc.date.created2008en
dc.date.issued2009en
dc.identifier.urihttps://hdl.handle.net/1959.11/2420en
dc.description.abstractProgeny testing in beef cattle can be used to provide phenotypes for estimating carcase trait breeding values. However, progeny are commonly selectively slaughtered over time based on live-animal indicators of market requirements for carcase traits, particularly if feedlot finished. This harvesting results in carcase trait records for non-random groups of animals because harvesting on liveweight (LWT) causes the progeny of genetically faster growing sires to be in earlier harvest groups. This can lead to confounding of genetic and harvest group effects in genetic evaluation models. Additionally, harvesting can lead to the effect of age not being partitioned. Therefore, the aim of this thesis was to find appropriate statistical methodology that can be applied to harvested data to give unbiased and accurate estimated breeding values (EBVs) for carcase traits. ... The study gives evidence that appropriate trait adjustments for age along with certain models are able to estimate accurate and unbiased sire EBVs for harvested data. This holds for data affected by specific harvest day effects, including for age-influenced carcase traits varying in level of genetic correlation with the harvesting criteria.en
dc.languageenen
dc.titleEstimation of Breeding Values for Animals Selectively Slaughtereden
dc.typeThesis Masters Researchen
dcterms.accessRightsUNE Greenen
dc.subject.keywordsAnimal Breedingen
local.contributor.firstnameChristopher Daviden
local.contributor.firstnameDaviden
local.contributor.firstnameHansen
local.subject.for2008070201 Animal Breedingen
local.subject.seo630103 Beef Cattleen
dcterms.RightsStatementCopyright 2008 - Christopher David Worsnopen
dc.date.conferred2009en
local.thesis.degreelevelMasters researchen
local.thesis.degreenameMaster of Rural Scienceen
local.contributor.grantorUniversity of New Englanden
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.emailchrisdworsnop@hotmail.comen
local.profile.emaildjohnsto@une.edu.auen
local.profile.emailhgraser@une.edu.auen
local.output.categoryT1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune_thesis-20081202-135648en
local.access.fulltextYesen
local.contributor.lastnameWorsnopen
local.contributor.lastnameJohnstonen
local.contributor.lastnameGraseren
dc.identifier.staffune-id:djohnstoen
dc.identifier.staffune-id:hgraseren
local.profile.roleauthoren
local.profile.rolesupervisoren
local.profile.rolesupervisoren
local.identifier.unepublicationidune:2493en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleEstimation of Breeding Values for Animals Selectively Slaughtereden
local.output.categorydescriptionT1 Thesis - Masters Degree by Researchen
local.description.statisticsepubsVisitors: 142<br />Views: 161<br />Downloads: 27en
local.thesis.borndigitalyesen
local.search.authorWorsnop, Christopher Daviden
local.search.supervisorJohnston, Daviden
local.search.supervisorGraser, Hansen
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/223fbad3-288c-49d8-bacb-59e8be6676been
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/11cad67a-af00-42ae-a035-39eb57a4ec90en
local.uneassociationYesen
local.year.conferred2009en
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/11cad67a-af00-42ae-a035-39eb57a4ec90en
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/223fbad3-288c-49d8-bacb-59e8be6676been
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Thesis Masters Research
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