Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
The study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thu...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2013-12-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016&lng=en&tlng=en |
| _version_ | 1818295556814929920 |
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| author | Priscilla Regina Tamioso Jaime Luiz Alberti Filho Laila Talarico Dias Rodrigo de Almeida Teixeira |
| author_facet | Priscilla Regina Tamioso Jaime Luiz Alberti Filho Laila Talarico Dias Rodrigo de Almeida Teixeira |
| author_sort | Priscilla Regina Tamioso |
| collection | DOAJ |
| description | The study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thus, three different single-trait animal models were fitted, considering the direct additive genetic effect (Model 1), the direct additive genetic and maternal permanent environmental effects (Model 2), and in Model 3, in addition to those in Model 2, the maternal additive genetic effect was included. After comparing models through the likelihood ratio test (LRT), model 3 was chosen as the most appropriate to estimate heritability for BW, WW and ADG1. Model 2 was considered as the best to estimate the coefficient of heritability for W180 and ADG2, and model 1 for ADG3. Direct heritability estimates were inflated when maternal effects were ignored. According to the most suitable models, the heritability estimates for BW, WW, W180, ADG1, ADG2 and ADG3 were 0.06, 0.08, 0.09, 0.07, 0.08 and 0.07, respectively, indicating low possibility of genetic gain through individual selection. The results show the importance of including maternal effects in the models to properly estimate genetic parameters even at post-weaning ages. |
| first_indexed | 2024-12-13T03:49:32Z |
| format | Article |
| id | doaj.art-5972a6e2016340f7b25f7a82ed4e067c |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-13T03:49:32Z |
| publishDate | 2013-12-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-5972a6e2016340f7b25f7a82ed4e067c2022-12-22T00:00:44ZengUniversidade Federal de Santa MariaCiência Rural1678-45962013-12-0143122215222010.1590/S0103-84782013001200016S0103-84782013001200016Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambsPriscilla Regina Tamioso0Jaime Luiz Alberti Filho1Laila Talarico Dias2Rodrigo de Almeida Teixeira3Universidade Federal do ParanáUniversidade Federal do ParanáUniversidade Federal do ParanáUniversidade Federal do ParanáThe study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thus, three different single-trait animal models were fitted, considering the direct additive genetic effect (Model 1), the direct additive genetic and maternal permanent environmental effects (Model 2), and in Model 3, in addition to those in Model 2, the maternal additive genetic effect was included. After comparing models through the likelihood ratio test (LRT), model 3 was chosen as the most appropriate to estimate heritability for BW, WW and ADG1. Model 2 was considered as the best to estimate the coefficient of heritability for W180 and ADG2, and model 1 for ADG3. Direct heritability estimates were inflated when maternal effects were ignored. According to the most suitable models, the heritability estimates for BW, WW, W180, ADG1, ADG2 and ADG3 were 0.06, 0.08, 0.09, 0.07, 0.08 and 0.07, respectively, indicating low possibility of genetic gain through individual selection. The results show the importance of including maternal effects in the models to properly estimate genetic parameters even at post-weaning ages.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016&lng=en&tlng=enefeitos maternosganho médio diárioherdabilidadepeso corporalSuffolk |
| spellingShingle | Priscilla Regina Tamioso Jaime Luiz Alberti Filho Laila Talarico Dias Rodrigo de Almeida Teixeira Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs Ciência Rural efeitos maternos ganho médio diário herdabilidade peso corporal Suffolk |
| title | Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs |
| title_full | Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs |
| title_fullStr | Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs |
| title_full_unstemmed | Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs |
| title_short | Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs |
| title_sort | estimates of co variance components and genetic parameters for growth traits in suffolk lambs |
| topic | efeitos maternos ganho médio diário herdabilidade peso corporal Suffolk |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016&lng=en&tlng=en |
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