Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20079
Full metadata record
DC FieldValueLanguage
dc.contributor.authorDonoghue, K Aen
dc.contributor.authorBird-Gardiner, T Len
dc.contributor.authorArthur, P Fen
dc.contributor.authorHerd, Robert Men
dc.contributor.authorHegarty, Rogeren
dc.date.accessioned2017-02-22T13:41:00Z-
dc.date.issued2016-
dc.identifier.citationJournal of Animal Science, 94(4), p. 1438-1445en
dc.identifier.issn1525-3163en
dc.identifier.issn0021-8812en
dc.identifier.urihttps://hdl.handle.net/1959.11/20079-
dc.description.abstractRuminants contribute 80% of the global livestock greenhouse gas (GHG) emissions mainly through the production of methane, a byproduct of enteric microbial fermentation primarily in the rumen. Hence, reducing enteric methane production is essential in any GHG emissions reduction strategy in livestock. Data on 1,046 young bulls and heifers from 2 performance-recording research herds of Angus cattle were analyzed to provide genetic and phenotypic variance and covariance estimates for methane emissions and production traits and to examine the interrelationships among these traits. The cattle were fed a roughage diet at 1.2 times their estimated maintenance energy requirements and measured for methane production rate (MPR) in open circuit respiration chambers for 48 h. Traits studied included DMI during the methane measurement period, MPR, and methane yield (MY; MPR/ DMI), with means of 6.1 kg/d (SD 1.3), 132 g/d (SD 25), and 22.0 g/kg (SD 2.3) DMI, respectively. Four forms of residual methane production (RMP), which is a measure of actual minus predicted MPR, were evaluated. For the first 3 forms, predicted MPR was calculated using published equations. For the fourth (RMPR), predicted MPR was obtained by regression of MPR on DMI. Growth and body composition traits evaluated were birth weight (BWT), weaning weight (WWT), yearling weight (YWT), final weight (FWT), and ultrasound measures of eye muscle area, rump fat depth, rib fat depth, and intramuscular fat. Heritability estimates were moderate for MPR (0.27 [SE 0.07]), MY (0.22 [SE 0.06]), and the RMP traits (0.19 [SE 0.06] for each), indicating that genetic improvement to reduce methane emissions is possible. The RMP traits and MY were strongly genetically correlated with each other (0.99 ± 0.01). The genetic correlation of MPR with MY as well as with the RMP traits was moderate (0.32 to 0.63). The genetic correlation between MPR and the growth traits (except BWT) was strong (0.79 to 0.86). These results indicate that selection for lower MPR may have undesired effect on animal productivity. On the other hand, MY and the RMPR were either not genetically correlated or weakly correlated with BWT, YWT, and FWT (-0.06 to 0.23) and body composition traits (-0.18 to 0.18). Therefore, selection for lower MY or RMPR would lead to lower MPR without impacting animal productivity. Where the use of a ratio trait (e.g., MY) is not desirable, selection on any of the forms of RMP would be an alternative.en
dc.languageenen
dc.publisherAmerican Society of Animal Scienceen
dc.relation.ispartofJournal of Animal Scienceen
dc.titleGenetic and phenotypic variance and covariance components for methane emission and postweaning traits in Angus cattleen
dc.typeJournal Articleen
dc.identifier.doi10.2527/jas.2015-0065en
dc.subject.keywordsAnimal Breedingen
local.contributor.firstnameK Aen
local.contributor.firstnameT Len
local.contributor.firstnameP Fen
local.contributor.firstnameRobert Men
local.contributor.firstnameRogeren
local.subject.for2008070201 Animal Breedingen
local.subject.seo2008830301 Beef Cattleen
local.profile.schoolAdministrationen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailtbirdgar@myune.edu.auen
local.profile.emailrherd3@une.edu.auen
local.profile.emailrhegart3@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20161114-163120en
local.publisher.placeUnited States of Americaen
local.format.startpage1438en
local.format.endpage1445en
local.identifier.scopusid84975686218en
local.peerreviewedYesen
local.identifier.volume94en
local.identifier.issue4en
local.contributor.lastnameDonoghueen
local.contributor.lastnameBird-Gardineren
local.contributor.lastnameArthuren
local.contributor.lastnameHerden
local.contributor.lastnameHegartyen
dc.identifier.staffune-id:tbirdgaren
dc.identifier.staffune-id:rherd3en
dc.identifier.staffune-id:rhegart3en
local.profile.orcid0000-0003-4689-5519en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:20278en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleGenetic and phenotypic variance and covariance components for methane emission and postweaning traits in Angus cattleen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorDonoghue, K Aen
local.search.authorBird-Gardiner, T Len
local.search.authorArthur, P Fen
local.search.authorHerd, Robert Men
local.search.authorHegarty, Rogeren
local.uneassociationUnknownen
local.identifier.wosid000374692700011en
local.year.published2016en
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/0b46fd8e-e7be-44fe-856b-c7d721b70fbden
local.subject.for2020300305 Animal reproduction and breedingen
local.subject.seo2020100401 Beef cattleen
Appears in Collections:Journal Article
School of Environmental and Rural Science
Files in This Item:
2 files
File Description SizeFormat 
Show simple item record

SCOPUSTM   
Citations

64
checked on May 18, 2024

Page view(s)

1,496
checked on May 5, 2024
Google Media

Google ScholarTM

Check

Altmetric


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.