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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Main Authors: Hasan Baneh, Javad Ahmadpanah, Yahya Mohammadi
Format: Article
Language:English
Published: Editora da Universidade Estadual de Maringá (Eduem) 2020-01-01
Series:Acta Scientiarum: Animal Sciences
Subjects:
Online Access:http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47380
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spelling 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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