Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/2770
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dc.contributor.authorSafari, Een
dc.contributor.authorFogarty, N Men
dc.contributor.authorGilmour, A Ren
dc.contributor.authorAtkins, K Den
dc.contributor.authorMortimer, S Ien
dc.contributor.authorSwan, Andrewen
dc.contributor.authorBrien, F Den
dc.contributor.authorGreeff, J Cen
dc.contributor.authorVan Der Werf, Julius Hermanen
dc.date.accessioned2009-10-29T16:44:00Z
dc.date.issued2007en
dc.identifier.citationAustralian Journal of Agricultural Research, 58(2), p. 169-175en
dc.identifier.issn0004-9409en
dc.identifier.urihttps://hdl.handle.net/1959.11/2770en
dc.description.abstractAccurate estimates of adjustment factors for systematic environmental effects are required for genetic evaluation systems. This study combined data from 7 research resource flocks across Australia to estimate genetic parameters and investigate the significance of various environmental factors for production traits in Australian Merino sheep. The flocks were maintained for several generations and represented contemporary Australian Merino fine, medium, and broad wool bloodlines over the past 30 years. Over 110 000 records were available for analysis for each of the major wool traits, with over 2700 sires and 25 000 dams. Univariate linear mixed animal models were used to analyse 6 wool, 4 growth, and 4 reproduction traits. This first paper outlines the data structure and the non-genetic effects of age of the animal, age of dam, birth-rearing type, sex, flock, bloodline, and year, which were significant with few exceptions for all production traits. Age of dam was not significant for reproduction traits and fleece yield. Generally, wool, growth, and reproduction traits need to be adjusted for age, birth-rearing type, and age of dam before the estimation of breeding values for pragmatic and operational reasons. Adjustment for animal age in wool traits needs to be applied for clean fleece weight (CFW), greasy fleece weight (GFW), and fibre diameter (FD) with inclusion of 2 age groups (2 years old and >2 years old), but for reproduction traits, inclusion of all age groups is more appropriate. For GFW, CFW, and hogget weight (HWT), adjustment for only 2 dam age groups of maiden and mature ewes seems sufficient, whereas for birth (BWT), weaning (WWT), and yearling (YWT) weights, adjustments need to be applied for all dam age groups. Adjustment for birth-rearing type (single-single, multiple-single, multiple-multiple) is appropriate for wool, growth, and reproduction traits. The implications of adjustment for non-genetic effects are discussed.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAustralian Journal of Agricultural Researchen
dc.titleAcross population genetic parameters for wool, growth, and reproduction traits in Australian Merino sheep: 1. Data structure and non-genetic effectsen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AR06161en
dc.subject.keywordsQuantitative Genetics (incl Disease and Trait Mapping Genetics)en
local.contributor.firstnameEen
local.contributor.firstnameN Men
local.contributor.firstnameA Ren
local.contributor.firstnameK Den
local.contributor.firstnameS Ien
local.contributor.firstnameAndrewen
local.contributor.firstnameF Den
local.contributor.firstnameJ Cen
local.contributor.firstnameJulius Hermanen
local.subject.for2008060412 Quantitative Genetics (incl Disease and Trait Mapping Genetics)en
local.subject.seo2008830311 Sheep - Woolen
local.profile.schoolAnimal Genetics and Breeding Uniten
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailaswan@une.edu.auen
local.profile.emailjvanderw@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordpes:5911en
local.publisher.placeMelbourne, Australiaen
local.format.startpage169en
local.format.endpage175en
local.peerreviewedYesen
local.identifier.volume58en
local.identifier.issue2en
local.title.subtitle1. Data structure and non-genetic effectsen
local.contributor.lastnameSafarien
local.contributor.lastnameFogartyen
local.contributor.lastnameGilmouren
local.contributor.lastnameAtkinsen
local.contributor.lastnameMortimeren
local.contributor.lastnameSwanen
local.contributor.lastnameBrienen
local.contributor.lastnameGreeffen
local.contributor.lastnameVan Der Werfen
dc.identifier.staffune-id:aswanen
dc.identifier.staffune-id:jvanderwen
local.profile.orcid0000-0003-2512-1696en
local.profile.roleauthoren
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local.identifier.unepublicationidune:2846en
dc.identifier.academiclevelAcademicen
local.title.maintitleAcross population genetic parameters for wool, growth, and reproduction traits in Australian Merino sheepen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 512<br />Views: 513<br />Downloads: 1en
local.search.authorSafari, Een
local.search.authorFogarty, N Men
local.search.authorGilmour, A Ren
local.search.authorAtkins, K Den
local.search.authorMortimer, S Ien
local.search.authorSwan, Andrewen
local.search.authorBrien, F Den
local.search.authorGreeff, J Cen
local.search.authorVan Der Werf, Julius Hermanen
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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