Genetic analysis of reproductive characteristics in Iran-Black sheep

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dc.creatorHasan Baneh
dc.creatorJavad Ahmadpanah
dc.creatorYahya Mohammadi
dc.date2020
dc.date.accessioned2026-07-07T03:59:31Z
dc.descriptionThis study was conducted to estimate genetic parameters and trends for reproduction traits using data collected at the breeding station of Iran-Black sheep during 1980 to 2004. The traits included in the analyses were litter size at birth (LSB) and weaning (LSW) and litter mean weight per lamb born (LMWLB) and weaned (LMWLW) as basic traits, and total litter weight at birth (TLWB) and weaning (TLWW) as composite traits. Direct heritability estimates for LSB, TLWB, LMWLB, LSW, TLWW and LMWLW were 0.11, 0.07, 0.33, 0.08, 0.09 and 0.11, respectively. The permanent environmental effects had significant impact on all traits and ranged from 0.05 to 0.16. Effect of service sire was highly significant (p < 0.01) for all traits except LMWLW. Estimates of genetic correlations ranged from -0.76 (LSB-LMWLB) to 0.98 (LSB-LSW). Phenotypic and environmental correlations were generally lower than those of genetic correlations. Environmental correlations ranged from -0.55 (LSW-LMWLW) to 0.99 (LSB-LSW). Also, the estimated correlation for the effect of service sire ranged from -0.77 (LMWLB-TLWW) to 0.96 (LSB-LSW and LSB-TLWW). The results suggest that selection based on TLWB could be more effective than the other traits to enhance reproductive performance in Iran-Black ewes.
dc.formatapplication/pdf
dc.identifier1806-2636
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303162575023
dc.identifierhttps://www.redalyc.org/journal/3031/303162575023/
dc.identifierhttps://www.redalyc.org/journal/3031/303162575023/html/
dc.identifierhttps://www.redalyc.org/journal/3031/303162575023/303162575023.epub
dc.identifierhttps://www.redalyc.org/journal/3031/303162575023/movil
dc.identifier10.4025/actascianimsci.v42i1.47380
dc.identifier.urihttp://hdl.handle.net/123456789/449824
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3031
dc.rightsActa Scientiarum. Animal Sciences
dc.sourceActa Scientiarum. Animal Sciences (Brasil) Vol.42
dc.subjectAgrociencias
dc.titleGenetic analysis of reproductive characteristics in Iran-Black sheep
dc.typeartículo científico

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Acta Scientiarum. Animal Sciences - Universidade Estadual de Maringá