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https://hdl.handle.net/1959.11/19030
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DC Field | Value | Language |
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dc.contributor.author | Bunter, Kim L | en |
dc.contributor.author | Brown, Daniel | en |
local.source.editor | Editor(s): Kim Bunter, Tim Byrne, Hans Daetwyler, Susanne Hermesch, Kathryn Kemper, James Kijas, David Nation, Wayne Pitchford, Suzanne Rowe, Matt Shaffer, Alison van Eenennaam | en |
dc.date.accessioned | 2016-05-24T14:53:00Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.21, p. 201-204 | en |
dc.identifier.isbn | 9780646945545 | en |
dc.identifier.issn | 1328-3227 | en |
dc.identifier.uri | https://hdl.handle.net/1959.11/19030 | - |
dc.description.abstract | Data from a single prolific Merino flock (N=10705 joining records) recorded over 10 years were used to estimate genetic parameters for annual total weight weaned (TWW) of ewes which weaned lambs (N=8615), treated as a ewe trait, and the accompanying reproductive traits. TWW was the sum of individual weights of weaned lambs to birth ewe. An alternative trait definition included ewes which lambed and lost, which received zero trait values (TWW0, N=9509). Both TWW and TWW0 were lowly heritable (range h²: 0.06-0.11). Most of the phenotypic variation in these traits resulted from variation in the number of lambs weaned. Trait definition significantly influenced both the observable variation in the ewe weaning weight traits (eg. TWW vs TWW0) and correlations with reproductive traits. Because total weight weaned traits combine direct and maternal effects, and multiple non-genetic sources of variation, prediction of response to selection for total weight weaned and its components depends on the trait definition used and accompanying population characteristics and genetic parameters. We conclude that selection on an index which combines breeding values for reproductive performance, and both direct and maternal contributions to weaning weight traits, should be considered to improve ewe productivity in a more predictable manner under dual purpose breeding goals. This index is provided by Sheep Genetics, which also appropriately analyses individual animal reproductive and weight data while accounting for systematic effects and multiple records. | en |
dc.language | en | en |
dc.publisher | Association for the Advancement of Animal Breeding and Genetics (AAABG) | en |
dc.relation.ispartof | Proceedings of the Association for the Advancement of Animal Breeding and Genetics | en |
dc.title | Revisiting Total Weaning Weight as a Selection Criterion | en |
dc.type | Conference Publication | en |
dc.relation.conference | AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics | en |
dcterms.accessRights | Gold | en |
dc.subject.keywords | Animal Breeding | en |
local.contributor.firstname | Kim L | en |
local.contributor.firstname | Daniel | en |
local.subject.for2008 | 070201 Animal Breeding | en |
local.subject.seo2008 | 830311 Sheep - Wool | en |
local.subject.seo2008 | 830310 Sheep - Meat | en |
local.profile.school | Animal Genetics and Breeding Unit | en |
local.profile.school | Animal Genetics and Breeding Unit | en |
local.profile.email | kbunter2@une.edu.au | en |
local.profile.email | dbrown2@une.edu.au | en |
local.output.category | E1 | en |
local.record.place | au | en |
local.record.institution | University of New England | en |
local.identifier.epublicationsrecord | une-20160408-160236 | en |
local.date.conference | 28th - 30th September, 2015 | en |
local.conference.place | Lorne, Australia | en |
local.publisher.place | Armidale, Australia | en |
local.format.startpage | 201 | en |
local.format.endpage | 204 | en |
local.url.open | http://www.aaabg.org/aaabghome/AAABG21papers/Bunter21201.pdf | en |
local.peerreviewed | Yes | en |
local.identifier.volume | 21 | en |
local.access.fulltext | Yes | en |
local.contributor.lastname | Bunter | en |
local.contributor.lastname | Brown | en |
dc.identifier.staff | une-id:kbunter2 | en |
dc.identifier.staff | une-id:dbrown2 | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.identifier.unepublicationid | une:19229 | en |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
local.title.maintitle | Revisiting Total Weaning Weight as a Selection Criterion | en |
local.output.categorydescription | E1 Refereed Scholarly Conference Publication | en |
local.relation.url | http://www.aaabg.org/aaabghome/proceedings21.php | en |
local.conference.details | AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28th - 30th September, 2015 | en |
local.search.author | Bunter, Kim L | en |
local.search.author | Brown, Daniel | en |
local.uneassociation | Unknown | en |
local.year.published | 2015 | en |
local.subject.for2020 | 300305 Animal reproduction and breeding | en |
local.subject.seo2020 | 100413 Sheep for wool | en |
local.subject.seo2020 | 100412 Sheep for meat | en |
local.date.start | 2015-09-28 | - |
local.date.end | 2015-09-30 | - |
Appears in Collections: | Animal Genetics and Breeding Unit (AGBU) Conference Publication |
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