Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/703
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dc.contributor.authorReverter, Aen
dc.contributor.authorJohnston, Den
dc.contributor.authorPerry, Den
dc.contributor.authorGoddard, MEen
dc.contributor.authorBurrow, HMen
dc.date.accessioned2008-07-30T14:37:00Z-
dc.date.issued2003-
dc.identifier.citationAustralian Journal of Agricultural Research, 54(2), p. 119-134en
dc.identifier.issn1444-9838en
dc.identifier.issn0004-9409en
dc.identifier.issn1836-5795en
dc.identifier.issn1836-0947en
dc.identifier.urihttps://hdl.handle.net/1959.11/703-
dc.description.abstractA total of 11 abattoir carcass measures were recorded on 7854 carcasses in temperate (TEMP) and tropically adapted (TROP) beef breeds. Breeds for TEMP included Angus, Hereford, Murray Grey, and Shorthorn; Brahman, Belmont Red, and Santa Gertrudis accounted for TROP breeds. Measurements included carcass weight (CWT), retail beef yield percentage (RBY), intramuscular fat percentage (IMF), subcutaneous fat depth at the P8 site (P8) and at 12/13th rib (RIB), eye muscle length by width (ELW), deep butt temperature (DBTEMP), fat colour score (FATC), meat colour score (MEATC), marbling score (MARB), and carcass muscle score (MUSC). Animals were finished to 3 different market weight endpoints, either on pasture or in a feedlot, and in different geographic regions for the TROP breeds. Both the phenotypic and genetic expressions of the traits were estimated at each level of market weight endpoint and finishing regime.Heritabilities (h<sup>2</sup>), genetic (r<sub>g</sub>) and phenotypic (r<sub>p</sub>) correlations between traits were estimated for TEMP and TROP separately. The design effects of market weight endpoint and finishing regimes were the most important sources of variation for continuously measured traits. Main effects for the scored traits were finishing regime for FATC and MEATC and market weight endpoint for MARB and MUSC. Feedlot finished cattle had the whitest FATC and the lightest MEATC.For TEMP, estimates of h<sup>2</sup> for CWT, RBY, IMF, P8, RIB, ELW, DBTEMP, FATC, MEATC, MARB, and MUSC were 0.39, 0.57, 0.38, 0.36, 0.27, 0.30, 0.10, 0.05, 0.11, 0.17, and 0.14, respectively.In comparison, h<sup>2</sup> for the same order of traits for TROP were 0.36, 0.50, 0.39, 0.30, 0.41, 0.32, 0.04, 0.09, 0.11, 0.25, and 0.11. The direction and magnitude of r<sub>g</sub> between traits were similar for TEMP and TROP, particularly between CWT, RBY, IMF, P8, and RIB. Genetic correlations of RBY were moderate and negative with all measures of fatness, including IMF (–0.38 TEMP and –0.43 TROP).Positive r<sub>g</sub> existed between all measures of fatness, with MARB and IMF close to unity.Negative r<sub>g</sub> was estimated between CWT and all fat measurements.Also negative were the r<sub>g</sub> and r<sub>p</sub> estimates between CWT and MEATC. For all traits in both TEMP and TROP, domestic weight carcasses exhibited lower additive variance than export market carcasses. However, genetic correlations between traits across market weight endpoints were positive and close to unity, with the exception of RBY for TROP. For TEMP breeds, genetic correlations between finishing regimes were close to unity.However, possible genotype by environment interactions were found for TROP for P8, MEATC, and MARB between finishing in different geographic regions, and between feedlot and pasture finished animals for RBY and MEATC. Genetic improvement of carcass traits is a possibility given the moderate heritabilities, moderate to strong genetic correlations, and little evidence of genotype by environment interactions.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAustralian Journal of Agricultural Researchen
dc.titleGenetic and phenotypic characterisation of animal, carcass and meat quality traits from temperate and tropically adapted beef breeds. 2: Abattoir carcass traitsen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AR02086en
dc.subject.keywordsAnimal Breedingen
local.contributor.firstnameAen
local.contributor.firstnameDen
local.contributor.firstnameDen
local.contributor.firstnameMEen
local.contributor.firstnameHMen
local.subject.for2008070201 Animal Breedingen
local.subject.seo630101 Sheep - meaten
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emaildjohnsto@une.edu.auen
local.profile.emailhburrow2@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordpes:818en
local.publisher.placeAustraliaen
local.format.startpage119en
local.format.endpage134en
local.identifier.scopusid0037243713en
local.peerreviewedYesen
local.identifier.volume54en
local.identifier.issue2en
local.title.subtitleAbattoir carcass traitsen
local.contributor.lastnameReverteren
local.contributor.lastnameJohnstonen
local.contributor.lastnamePerryen
local.contributor.lastnameGoddarden
local.contributor.lastnameBurrowen
dc.identifier.staffune-id:areverteen
dc.identifier.staffune-id:djohnstoen
dc.identifier.staffune-id:dperry7en
dc.identifier.staffune-id:mgoddar5en
dc.identifier.staffune-id:hburrow2en
local.profile.orcid0000-0002-4995-8311en
local.profile.orcid0000-0002-7989-0426en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:716en
dc.identifier.academiclevelAcademicen
local.title.maintitleGenetic and phenotypic characterisation of animal, carcass and meat quality traits from temperate and tropically adapted beef breeds. 2en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorReverter, Aen
local.search.authorJohnston, Den
local.search.authorPerry, Den
local.search.authorGoddard, MEen
local.search.authorBurrow, HMen
local.uneassociationUnknownen
local.year.published2003en
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Journal Article
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