Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/5071
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dc.contributor.authorWilkins, J Fen
dc.contributor.authorMcKiernan, W Aen
dc.contributor.authorIrwin, Jen
dc.contributor.authorOrchard, Ben
dc.contributor.authorBarwick, Stephenen
dc.date.accessioned2010-03-12T14:11:00Z-
dc.date.issued2009-
dc.identifier.citationAnimal Production Science, 49(6), p. 515-524en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.urihttps://hdl.handle.net/1959.11/5071-
dc.description.abstractThe present experiment, 'Regional Combinations', examined growth, and carcass- and meat-quality traits in the progeny of sires genetically diverse for fatness and meat yield when grown at different rates from weaning to feedlot entry. The present paper is the first of several papers describing results from the New South Wales site, one of four in the project. It reports the effects on growth and body composition of steers during backgrounding and feedlot finishing phases. A total of 43 sires within three carcass-class categories, defined as high potential for meat yield, for marbling or for both traits, was used, based on estimated breeding values for retail beef yield and intramuscular fat. Sires were drawn from Angus, Charolais, Limousin, Black Wagyu and Red Wagyu breeds, providing a range of carcass sire types across the three carcass classes. Matings were by artificial insemination to Hereford dams from a single herd. Steer progeny were grown at conventional (slow: ~0.5 kg/day) or accelerated (fast: ~0.7 kg/day) rates from weaning to feedlot entry weight, targeting group means of 400 kg. Accelerated and conventionally grown groups from successive calvings entered the feedlot at similar entry liveweights at the same time, then having identical management during the 100-day finishing phase before slaughter. Within finishing cohorts, fast backgrounding growth resulted in increased subcutaneous fatness at feedlot entry in steers of all carcass types. Slow growth during backgrounding resulted in faster (compensatory) growth in the feedlot in all classes and sire types. This increased the deposition of fat in slow-backgrounded steers compared with that in fast-backgrounded steers during feedlotting, and thus reduced the difference between the groups in P8 and rib fat at feedlot exit. However, there did appear to be an advantage in the level of compensation in the feedlot in favour of those sire types with a genetic propensity for faster growth. Backgrounding growth rate affected body composition and the rate of weight gain during finishing. Faster growth produced more subcutaneous fat during both backgrounding and finishing. Steer progeny groups clearly showed the expected responses in growth and body composition, on the basis of the genetic potential of their sires.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titlePerformance of steer progeny of sires differing in genetic potential for fatness and meat yield following post-weaning growth at different rates.: 1. Growth and live-animal compositionen
dc.typeJournal Articleen
dc.identifier.doi10.1071/EA08268en
dcterms.accessRightsUNE Greenen
dc.subject.keywordsAnimal Breedingen
local.contributor.firstnameJ Fen
local.contributor.firstnameW Aen
local.contributor.firstnameJen
local.contributor.firstnameBen
local.contributor.firstnameStephenen
local.subject.for2008070201 Animal Breedingen
local.subject.seo2008830301 Beef Cattleen
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.emailsbarwick@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20091110-122450en
local.publisher.placeAustraliaen
local.format.startpage515en
local.format.endpage524en
local.identifier.scopusid66149171742en
local.peerreviewedYesen
local.identifier.volume49en
local.identifier.issue6en
local.title.subtitle1. Growth and live-animal compositionen
local.access.fulltextYesen
local.contributor.lastnameWilkinsen
local.contributor.lastnameMcKiernanen
local.contributor.lastnameIrwinen
local.contributor.lastnameOrcharden
local.contributor.lastnameBarwicken
dc.identifier.staffune-id:sbarwicken
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:5189en
dc.identifier.academiclevelAcademicen
local.title.maintitlePerformance of steer progeny of sires differing in genetic potential for fatness and meat yield following post-weaning growth at different rates.en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorWilkins, J Fen
local.search.authorMcKiernan, W Aen
local.search.authorIrwin, Jen
local.search.authorOrchard, Ben
local.search.authorBarwick, Stephenen
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/57771a1c-f3a5-4bf7-844e-2254acee439aen
local.uneassociationUnknownen
local.year.published2009en
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/57771a1c-f3a5-4bf7-844e-2254acee439aen
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Journal Article
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