Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/12885
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dc.contributor.authorCottle, Daviden
dc.contributor.authorCoffey, Michael Pen
dc.date.accessioned2013-07-03T13:07:00Z
dc.date.issued2013en
dc.identifier.citationJournal of Animal Breeding and Genetics, 130(1), p. 41-54en
dc.identifier.issn0931-2668en
dc.identifier.issn1439-0388en
dc.identifier.urihttps://hdl.handle.net/1959.11/12885en
dc.description.abstractThe objective of this study was to assess the impact of using different relative economic values (REVs) in selection indices on predicted financial and trait gains from selection of sires of cows and on the choice of leading Holstein bulls available in the UK dairy industry. Breeding objective traits were milk yield, fat yield, protein yield, lifespan, mastitis, non-return rate, calving interval and lameness. Relative importance of a trait, as estimated by a.h², was only moderately related to the rate of financial loss or total economic merit (ΔTEM) per percentage under- or overestimation of REV (r = 0.38 and 0.29, respectively) as a result of the variance-covariance structure of traits. The effects on TEM of under- or overestimating trait REVs were non-symmetrical. TEM was most sensitive to incorrect REVs for protein, fat, milk and lifespan and least sensitive to incorrect calving interval, lameness, non-return and mastitis REVs. A guide to deciding which dairy traits require the most rigorous analysis in the calculation of their REVs is given. Varying the REVs within a fairly wide range resulted in different bulls being selected by index and their differing predicted transmitting abilities would result in the herds moving in different directions in the long term (20 years). It is suggested that customized indices, where the farmer creates rankings of bulls tailored to their specific farm circumstances, can be worthwhile.en
dc.languageenen
dc.publisherWiley-Blackwell Verlag GmbHen
dc.relation.ispartofJournal of Animal Breeding and Geneticsen
dc.titleThe sensitivity of predicted financial and genetic gains in Holsteins to changes in the economic value of traitsen
dc.typeJournal Articleen
dc.identifier.doi10.1111/j.1439-0388.2012.01002.xen
dc.subject.keywordsAnimal Breedingen
local.contributor.firstnameDaviden
local.contributor.firstnameMichael Pen
local.subject.for2008070201 Animal Breedingen
local.subject.seo2008830302 Dairy Cattleen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAnimal Scienceen
local.profile.emaildcottle2@une.edu.auen
local.profile.emailMike.Coffey@sac.ac.uken
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20130218-131114en
local.publisher.placeGermanyen
local.format.startpage41en
local.format.endpage54en
local.peerreviewedYesen
local.identifier.volume130en
local.identifier.issue1en
local.contributor.lastnameCottleen
local.contributor.lastnameCoffeyen
dc.identifier.staffune-id:dcottle2en
local.profile.orcid0000-0003-3875-3465en
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:13093en
dc.identifier.academiclevelAcademicen
local.title.maintitleThe sensitivity of predicted financial and genetic gains in Holsteins to changes in the economic value of traitsen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 80<br />Views: 79<br />Downloads: 0en
local.search.authorCottle, Daviden
local.search.authorCoffey, Michael Pen
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