| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Genetic trends in the performance and reproductive traits of pigs
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| Autores: |
Torres Filho,Rodolpho de Almeida
Torres,Robledo de Almeida
Lopes,Paulo Sávio
Pereira,Carmen Silva
Euclydes,Ricardo Frederico
Araújo,Cláudio Vieira de
Silva,Martinho de Almeida e
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| Data: |
2005-03-01
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| Ano: |
2005
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| Palavras-chave: |
Average daily gain
Backfat thickness
Birth litter weight
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| Resumo: |
The selection and evaluation of breeds and purebred lines to be used as the parental stock is an important step for the success of any animal breeding program. In this study, the feed:gain ratio, backfat thickness corrected for 100 kg, age to 100 kg, average daily gain, and age of sow at first farrowing were used to evaluate the genetic trends for direct and maternal additive genetic values in Large White pigs. The total number of piglets born or born alive and the litter weight at birth were used as indicators of the genetic trends for the direct additive values. The genetic trends were calculated by regression of the average predicted genetic values per year for each trait versus the offspring's year of birth (for performance traits) or versus the dam year of birth (for reproduction traits). The genetic trend estimates for direct effects showed that selection decisions made during the breeding program effectively improved the performance traits. However, for reproductive traits, the regression estimates showed no definite trend. The genetic trends for the maternal effects were generally positive but of low magnitude.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100017
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572005000100017
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.28 n.1 2005
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| Direitos: |
info:eu-repo/semantics/openAccess
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