Two-Way Selection for Daily Gain and Feed Conversion in a Composite Rabbit Population

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dc.contributor.authorMoura, Ana Silvia Alves Meira Tavares [UNESP]
dc.contributor.authorKaps, M.
dc.contributor.authorVogt, D. W.
dc.contributor.authorLamberson, W. R.
dc.contributor.institutionUniversity of Missouri
dc.contributor.institutionUniversity of Hawaii
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:18:16Z
dc.date.available2014-05-27T11:18:16Z
dc.date.issued1997-09-01
dc.description.abstractWe conducted a two-way selection experiment in a composite rabbit population to investigate the responses to selection for postweaning ADG and feed conversion (FC). Two generations of crossing, followed by four generations of random pair matings, preceded three generations of selection. Selection was practiced within four lines: high-feed conversion (HFC), low-feed conversion (LFC), high gain (HG), and low gain (LG). Data on 1,446 rabbits from the random mating and selection generations were fitted to an animal model to estimate heritabilities of and the genetic correlation between ADG and FC. The two-trait model included rabbit and common litter random effects and line, generation, and sex fixed effects. Estimates of heritability of ADG and FC were .48 and .29, respectively, and the genetic correlation between them was -.82. Common litter environmental effects accounted for a proportion of .11 and . 13 of the phenotypic variation of the two traits, respectively. For ADG (in g/d) the regressions of mean breeding values on generation number during the selection period were 1.23 ± .12 (P < .01) in the HG line and -.86 ± .12 (P < .01) in the LG line; the regressions for FC (in g feed/g gain) were -.07 ± .01 (P < .01) in the HFC line and .03 ± .01 (P < .05) in the LFC line. Selection for ADG was effective in improving ADG and FC.en
dc.description.affiliationDepartment of Animal Sciences University of Missouri, Columbia, MO 65211
dc.description.affiliationAnimal Sciences Department University of Hawaii, Honolulu, HI 96822
dc.description.affiliationDepto. de Prod. e Exploracao Animal FMVZ UNESP, Botucatu - SP 18618-000
dc.description.affiliationUnespDepto. de Prod. e Exploracao Animal FMVZ UNESP, Botucatu - SP 18618-000
dc.format.extent2344-2349
dc.identifierhttp://www.journalofanimalscience.org/content/75/9/2344.long
dc.identifier.citationJournal of Animal Science, v. 75, n. 9, p. 2344-2349, 1997.
dc.identifier.file2-s2.0-0031228705.pdf
dc.identifier.issn0021-8812
dc.identifier.scopus2-s2.0-0031228705
dc.identifier.urihttp://hdl.handle.net/11449/65183
dc.language.isoeng
dc.relation.ispartofJournal of Animal Science
dc.relation.ispartofjcr1.711
dc.relation.ispartofsjr0,848
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectFeed Conversion
dc.subjectGenetic Parameters
dc.subjectGrowth
dc.subjectRabbits
dc.subjectSelection
dc.subjectanimal
dc.subjectbiological model
dc.subjecteating
dc.subjectenergy metabolism
dc.subjectenvironment
dc.subjectfemale
dc.subjectgenetic selection
dc.subjectgenetics
dc.subjectgrowth, development and aging
dc.subjectmale
dc.subjectphenotype
dc.subjectphysiology
dc.subjectrabbit
dc.subjectregression analysis
dc.subjectweight gain
dc.subjectAnimals
dc.subjectEating
dc.subjectEnergy Metabolism
dc.subjectEnvironment
dc.subjectFemale
dc.subjectMale
dc.subjectModels, Biological
dc.subjectModels, Genetic
dc.subjectPhenotype
dc.subjectRegression Analysis
dc.subjectSelection (Genetics)
dc.subjectWeight Gain
dc.titleTwo-Way Selection for Daily Gain and Feed Conversion in a Composite Rabbit Populationen
dc.typeArtigo
dcterms.licensehttp://journalofanimalscience.org/site/misc/ifora.xhtml
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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