Genetic evaluation of growth rate and efficiency-related traits in Dorper sheep

cg.contactshanbel21@gmail.comen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerAmhara Regional Agricultural Research Institute, Debre Birhan Agricultural Research Center - ARARI-DBARCen_US
cg.contributor.crpResilient Agrifood Systems - RAFSen_US
cg.contributor.funderEthiopian Institute of Agricultural Research - EIARen_US
cg.contributor.funderAmhara Regional Agricultural Research Institute - ARARIen_US
cg.contributor.initiativeSustainable Animal Productivityen_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.countryETen_US
cg.coverage.regionEastern Africaen_US
cg.creator.idGetachew, Tesfaye: 0000-0002-0544-6314en_US
cg.date.embargo-end-dateTimelessen_US
cg.identifier.doihttps://dx.doi.org/10.1016/j.egg.2023.100186en_US
cg.issn2405-9854en_US
cg.journalEcological Genetics and Genomicsen_US
cg.subject.actionAreaResilient Agrifood Systemsen_US
cg.subject.agrovocheritabilityen_US
cg.subject.agrovocgenetic correlationen_US
cg.subject.impactAreaClimate adaptation and mitigationen_US
cg.subject.impactAreaNutrition, health and food securityen_US
cg.subject.impactAreaPoverty reduction, livelihoods and jobsen_US
cg.subject.sdgSDG 1 - No povertyen_US
cg.subject.sdgSDG 13 - Climate actionen_US
cg.volume28en_US
dc.contributorGoshme, Shenkuteen_US
dc.contributorAbebe, Aschalewen_US
dc.contributorBisrat, Asfawen_US
dc.contributorAbebe, Ayeleen_US
dc.contributorZewdie, Tesfayeen_US
dc.contributorAreaya, Alemnewen_US
dc.contributorMekonnen, Teferaen_US
dc.contributorEshete, Mesfinen_US
dc.contributorGetachew, Tesfayeen_US
dc.creatorYeshaw, Shanbelen_US
dc.date.accessioned2023-12-15T15:28:11Z
dc.date.available2023-12-15T15:28:11Z
dc.description.abstractThe present study was carried out to estimate genetic and phenotypic parameters for growth rate and efficiency-related traits in Dorper sheep. Growth records from the breeding flock of Dorper sheep collected between 2012 and 2021 at Debre Birhan Agricultural Research Center, Amhara Region, Ethiopia were used in this study. (Co)variance components and corresponding genetic parameters for daily gain from birth to weaning (DG0-3), daily gain from weaning to six months (DG3-6), and daily gain from six months to yearling (DG6-12) and corresponding kleiber ratios (KR0-3, KR3-6, KR6-12), efficiency of growth (GE0-3, GE3-6, GE6-12) and relative growth rate (RG0-3, RG3-6, RG6-12) were estimated using restricted maximum likelihood (REML) procedure fitting six different univariate animal models. The most appropriate model for each trait was determined by log-likelihood ratio test. Multivariate analysis was carried out to estimate correlations between traits. Year of birth had a significant effect (P < 0.001) in all studied traits. Furthermore birth season had a significant effect (P < 0.01) in traits measured during pre-weaning growth period. Phenotypic performance for all studied traits except traits measured from six months to 12 months of age showed a declined trend over years. Model including only direct genetic effects was chosen as the most appropriate model for all studied traits, except for GE0-3 and GR0-3 which model included maternal genetic effects was the most appropriate model. Direct heritability estimates were, respectively, 0.10 ± 0.06, 0.16 ± 0.07, 0.26 ± 0.13 and 0.26 ± 0.13 for DG0-3, KR0-3, GE0-3 and GR0-3; 0.02 ± 0.05, 0.02 ± 0.04, 0.00 ± 0.04 and 0.03 ± 0.05 for DG3-6, KR3-6, GE3-6 and GR3-6; and 0.22 ± 0.10, 0.14 ± 0.09, 0.11 ± 0.09 and 0.12 ± 0.09 for DG6-12, KR6-12, GE6-12 and GR6-12. Estimates of the additive genetic coefficients of variation (CVA) were used as a measurement of genetic variability and ranged between 0.78% (GE3-6) and 27.13% (DG6-12). Genetic correlations among the traits ranged from −0.56 (DG3-6 and GE6-12) to 0.99 (KR3-6-GR3-6, GE3-6-GR3-6, GE6-12-GR6-12) and phenotypic correlation ranged from −0.61 (GE6-12-DG3-6) to 0.99 (GR3-6-KR3-6, GR3-6-GE3-6, GR6-12-GE6-12). Traits measured during the pre-weaning growth period had negative and weak genetic correlations with traits measured during the post-weaning growth period and ranged from −0.31 (DG0-3-GE6-12) to 0.20 (DG0-3-DG3-6). The importance of efficiency-related traits will increase significantly and will attract much more attention in sheep production in the central highlands of Ethiopia. Including DG0-3 in the selection index is recommended to improve efficiency of the ongoing Dorper breeding program.en_US
dc.formatPDFen_US
dc.identifierhttps://mel.cgiar.org/dspace/limiteden_US
dc.identifier.citationShanbel Yeshaw, Shenkute Goshme, Aschalew Abebe, Asfaw Bisrat, Ayele Abebe, Tesfaye Zewdie, Alemnew Areaya, Tefera Mekonnen, Mesfin Eshete, Tesfaye Getachew. (1/9/2023). Genetic evaluation of growth rate and efficiency-related traits in Dorper sheep. Ecological Genetics and Genomics, 28.en_US
dc.identifier.statusTimeless limited accessen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/68924
dc.languageenen_US
dc.publisherElsevieren_US
dc.sourceEcological Genetics and Genomics;28,(2023)en_US
dc.subjectgenetic parameteren_US
dc.subjectgenetic correlationsen_US
dc.subjectadditive coefcient of variationen_US
dc.subjectefficiency-related traitsen_US
dc.titleGenetic evaluation of growth rate and efficiency-related traits in Dorper sheepen_US
dc.typeJournal Articleen_US
dcterms.available2023-07-05en_US
dcterms.issued2023-09-01en_US

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