| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Strategies to control inbreeding in a pig breeding program: a simulation study
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| Autores: |
Lopes,Jader Silva
Rorato,Paulo Roberto Nogara
Mello,Fernanda Cristina Breda
Freitas,Marcelo Silva de
Prestes,Alan Miranda
Garcia,Diogo Anastácio
Oliveira,Maurício Morgado de
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| Data: |
2019-01-01
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| Ano: |
2019
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| Palavras-chave: |
Full-sibs
Half-sibs
Landrace breed
Pietrain breed
Selection strategies
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| Resumo: |
ABSTRACT: The objective of this study was to evaluate, through data simulation, the impact of restrictions on the maximum number of full- and half-sibs selected for males and females on the level of inbreeding and genetic gain of the herd. Data came from real populations A and B, composed of Pietrain and Landrace breed pigs, respectively. To generate the simulated populations, a Fortran-language simulator was developed using the (co)variances of the breeding values and the productive and reproductive rates obtained from populations A and B. Two data files were created. The first contained the pedigree of the previous 10 years, with 21,906 and 251,343 animals in populations A and B, respectively. The second included breeding values for age to reach 110 Kg body weight, backfat thickness, and feed conversion, for both populations; longissimus dorsi muscle depth, for population A only; and number of live piglets at the 5th day of life per farrowing, for population B only. Three scenarios were simulated with ten generations by varying the restrictions on the number of full- and half-sibs selected for males and females, with 30 replicates per generation and scenario. Regardless of the mating strategy used in a closed production unit, there is an increase in inbreeding levels. Inbreeding increases are larger in populations of smaller effective size. Restrictions on the number of full- and half-sibs selected are effective in reducing increments in inbreeding. Restriction to a maximum of two full-sibs and three half-sibs for males and three full sisters for females provided the highest genetic gains.
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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=S0103-84782019000700653
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/0103-8478cr20180994
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.49 n.7 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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