Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4432
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dc.contributor.authorBolormaa, Sen
dc.contributor.authorOlayemi, Men
dc.contributor.authorVan Der Werf, Julius Hen
dc.contributor.authorBaillie, Neilen
dc.contributor.authorLe Jambre, Fen
dc.contributor.authorRuvinsky, Anatolyen
dc.contributor.authorWalkden-Brown, Steve Wen
dc.date.accessioned2010-02-02T16:30:00Z-
dc.date.issued2010-
dc.identifier.citationAnimal Production Science, 50(1), p. 25-36en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.urihttps://hdl.handle.net/1959.11/4432-
dc.description.abstractGenetic parameters for liveweight (LWT), greasy fleece weight (GFW), mean fibre diameter (MFD), standard deviation of MFD (MFD-s.d.), mean fibre curvature (CURVE) percentage of medullated (%MED) and kemp (%KEMP) fibres, faecal worm egg count (WEC), packed cell volume (PCV), mean corpuscular volume (MCV) mean corpuscular haemoglobin content (MCHC), circulating anti-nematode IgG (IgG) and counts of circulating eosinophils (EOS), lymphocytes (LYM), neutrophils (NEU), basophils (BASO) and monocytes (MONO) up to 18 months of age were estimated in Australian Angora goats (608 animals, 14 sires 3 years of birth). Measurements were made during a period of natural parasite challenge up to 5 months of age, or following artificial challenge with 10 000 infective larvae of 'Trichostrongylus colubriformis' at 5.25 months of age. Year of birth had a significant impact on production and parasite-associated traits at all ages studied. Sex had a marked effect on production and erythrocyte traits. Birth type had no effect on any traits in animals older than 6 months. Maternal effects were not significant except for LWT at 3, 5 and 6 months and for IgG at 3 months. Most production traits were highly (LWT, GFW, MFD,%MED)or moderately (CURVE, MFD-s.d.) heritable (range 0.17–0.59) with only %KEMP having a low heritability (0.02–0.14). The heritability estimates (±s.e.) for CURVE are novel for goats and ranged from 0.18 ± 0.09 at first shearing to 0.44 ± 0.14 at third shearing. Heritability estimates were low forWEC(0.02–0.16) and for specific IgG during natural infection (0.14-0.15) but higher for IgG following artificial challenge with 'T. colubriformis' (0.42 ± 0.13). Of the haematological variables NEU and all red cell traits were highly heritable (0.45–0.71), LYM and MONO were moderately to highly heritable (0.31–0.55), and EOS was weakly to moderately heritable (0.06–0.28). Strong phenotypic correlations existed between production traits. MFD was positively correlated with GFW and negatively correlated with CURVE, indicating that finer fibres have a higher crimp or wave count. WEC had consistent negative phenotypic correlations with PCV, LYM and EOS, and positive correlations with NEU. Correlations with IgG were positive up to 5 months and negative thereafter. Phenotypic correlations between WEC and LWT as well as with GFW and MFD were negative. Heritability estimates for production traits were generally consistent with other studies. Haematological and fibre curvature findings are completely novel for Angora goats. Estimates of heritability for WEC fell in mid range of published findings for other goat breeds, and these results suggest that there is some scope for breeding for worm resistance in Angoras but the response is likely to be slow.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titleEstimates of genetic and phenotypic parameters for production, haematological and gastrointestinal nematode-associated traits in Australian Angora goatsen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN09035en
dc.subject.keywordsAnimal Breedingen
local.contributor.firstnameSen
local.contributor.firstnameMen
local.contributor.firstnameJulius Hen
local.contributor.firstnameNeilen
local.contributor.firstnameFen
local.contributor.firstnameAnatolyen
local.contributor.firstnameSteve Wen
local.subject.for2008070201 Animal Breedingen
local.subject.seo2008830304 Goatsen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Scienceen
local.profile.schoolAnimal Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailjvanderw@une.edu.auen
local.profile.emailnbaillie@une.edu.auen
local.profile.emailaruvinsk@une.edu.auen
local.profile.emailswalkden@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20091013-094628en
local.publisher.placeAustraliaen
local.format.startpage25en
local.format.endpage36en
local.identifier.scopusid73249149875en
local.peerreviewedYesen
local.identifier.volume50en
local.identifier.issue1en
local.contributor.lastnameBolormaaen
local.contributor.lastnameOlayemien
local.contributor.lastnameVan Der Werfen
local.contributor.lastnameBaillieen
local.contributor.lastnameLe Jambreen
local.contributor.lastnameRuvinskyen
local.contributor.lastnameWalkden-Brownen
dc.identifier.staffune-id:jvanderwen
dc.identifier.staffune-id:nbaillieen
dc.identifier.staffune-id:aruvinsken
dc.identifier.staffune-id:swalkdenen
local.profile.orcid0000-0003-2512-1696en
local.profile.orcid0000-0002-0638-5533en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:4537en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleEstimates of genetic and phenotypic parameters for production, haematological and gastrointestinal nematode-associated traits in Australian Angora goatsen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorBolormaa, Sen
local.search.authorOlayemi, Men
local.search.authorVan Der Werf, Julius Hen
local.search.authorBaillie, Neilen
local.search.authorLe Jambre, Fen
local.search.authorRuvinsky, Anatolyen
local.search.authorWalkden-Brown, Steve Wen
local.uneassociationUnknownen
local.year.published2010en
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