Genetic analysis of reproductive characteristics in Iran-Black sheep
This 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...
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Editora da Universidade Estadual de Maringá (Eduem)
2020-01-01
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Online Access: | http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47380 |
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doaj-34aa7eaef0a0411cbb36a883a72f6f8d2020-11-25T04:08:23ZengEditora da Universidade Estadual de Maringá (Eduem)Acta Scientiarum: Animal Sciences1806-26361807-86722020-01-0142e47380e4738010.4025/actascianimsci.v42i1.4738047380Genetic analysis of reproductive characteristics in Iran-Black sheepHasan Baneh0Javad Ahmadpanah1Yahya Mohammadi2Animal Science Research Institute of Iran, Agricultural Research, Education and Extension OrganizationKermanshah Agricultural and Natural Resources Research and Education Center, Agriculture Research, Education and Extension Organization Ilam UniversityThis 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.http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47380iran-black sheepreproduction traitsreml. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hasan Baneh Javad Ahmadpanah Yahya Mohammadi |
spellingShingle |
Hasan Baneh Javad Ahmadpanah Yahya Mohammadi Genetic analysis of reproductive characteristics in Iran-Black sheep Acta Scientiarum: Animal Sciences iran-black sheep reproduction traits reml. |
author_facet |
Hasan Baneh Javad Ahmadpanah Yahya Mohammadi |
author_sort |
Hasan Baneh |
title |
Genetic analysis of reproductive characteristics in Iran-Black sheep |
title_short |
Genetic analysis of reproductive characteristics in Iran-Black sheep |
title_full |
Genetic analysis of reproductive characteristics in Iran-Black sheep |
title_fullStr |
Genetic analysis of reproductive characteristics in Iran-Black sheep |
title_full_unstemmed |
Genetic analysis of reproductive characteristics in Iran-Black sheep |
title_sort |
genetic analysis of reproductive characteristics in iran-black sheep |
publisher |
Editora da Universidade Estadual de Maringá (Eduem) |
series |
Acta Scientiarum: Animal Sciences |
issn |
1806-2636 1807-8672 |
publishDate |
2020-01-01 |
description |
This 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. |
topic |
iran-black sheep reproduction traits reml. |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47380 |
work_keys_str_mv |
AT hasanbaneh geneticanalysisofreproductivecharacteristicsiniranblacksheep AT javadahmadpanah geneticanalysisofreproductivecharacteristicsiniranblacksheep AT yahyamohammadi geneticanalysisofreproductivecharacteristicsiniranblacksheep |
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