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dc.contributorGetachew, Tesfayeen_US
dc.contributorHaile, Aynalemen_US
dc.contributorRischkowsky, Barbaraen_US
dc.contributorSölkner, Johannen_US
dc.contributorTibbo, Markosen_US
dc.creatorGizaw Assefa, Solomonen_US
dc.identifier.citationSolomon Gizaw Assefa, Tesfaye Getachew, Aynalem Haile, Barbara Rischkowsky, Johann Sölkner, Markos Tibbo. (19/6/2013). Optimization of selection for growth in Menz Sheep while minimizing inbreeding depression in fitness traits. Genetics Selection Evolution, 45.en_US
dc.description.abstractThe genetic trends in fitness (inbreeding, fertility and survival) of a closed nucleus flock of Menz sheep under selection during ten years for increased body weight were investigated to evaluate the consequences of selection for body weight on fitness. A mate selection tool was used to optimize in retrospect the actual selection and matings conducted over the project period to assess if the observed genetic gains in body weight could have been achieved with a reduced level of inbreeding. In the actual selection, the genetic trends for yearling weight, fertility of ewes and survival of lambs were 0.81 kg, –0.00026% and 0.016% per generation. The average inbreeding coefficient remained zero for the first few generations and then tended to increase over generations. The genetic gains achieved with the optimized retrospective selection and matings were highly comparable with the observed values, the correlation between the average breeding values of lambs born from the actual and optimized matings over the years being 0.99. However, the level of inbreeding with the optimized mate selections remained zero until late in the years of selection. Our results suggest that an optimal selection strategy that considers both genetic merits and coancestry of mates should be adopted to sustain the Menz sheep breeding program.en_US
dc.publisherBioMed Centralen_US
dc.sourceGenetics Selection Evolution;45,(2013)en_US
dc.subjectmating groupen_US
dc.subjectmate selectionen_US
dc.subjectestimate breedingen_US
dc.subjectgood lineaen_US
dc.subjectunbiased predictionen_US
dc.titleOptimization of selection for growth in Menz Sheep while minimizing inbreeding depression in fitness traitsen_US
dc.typeJournal Articleen_US
cg.creator.idGizaw Assefa, Solomon: 0000-0002-7489-062Xen_US
cg.creator.idGetachew, Tesfaye: 0000-0002-0544-6314en_US
cg.creator.idHaile, Aynalem: 0000-0001-5914-0487en_US
cg.creator.idRischkowsky, Barbara: 0000-0002-0035-471Xen_US
cg.subject.agrovocgenetic gainen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerFood and Agriculture Organization of the United Nations - FAOen_US
cg.contributor.centerUniversity of Natural Resources and LIfe Science - BOKUen_US
cg.contributor.centerAmhara Livestock Resources Development and Promotion Agency, Debre Berhan Sheep Improvement and Multiplication Centeren_US
cg.contributor.crpCGIAR Research Program on Dryland Systems - DSen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionEastern Africaen_US
cg.isijournalISI Journalen_US
dc.identifier.statusOpen accessen_US
cg.journalGenetics Selection Evolutionen_US

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