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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
30/08/1994 |
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Data da última atualização: |
10/06/2025 |
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Autoria: |
TORO, M.; PEREZ-ENCISO, M. |
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Título: |
Optimization of selection response under restricted inbreeding. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Genetics Selection Evolution, v. 22, p. 93-107, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
A reasonable objective for selection programs in small populations is the maximization of response, with a restriction on the increase of inbreeding. This restriction will be especially important when information on relatives is used for evaluation of candidates for selection. To achieve this objective, different strategies have been proposed: (i) to reduce the intensity of selection; (ii) to lower the weight given to family information in an index below the optimal value; (iii) to restrict the variation of family size, (iv) to make matings between the selected animals, so as to minimize the average coancestry coefficient; and (v) to find a general solution using linear programing. These strategies have been illustrated by genetic simulation of a simple example. The population consisted of 8 males and 8 females selected from 32 animals evaluated in each sex. The candidates were evaluated by an index using information on the individual and its 7 sibs. Five generations of selection were practised. It was concluded that there are several alternative strategies which ensure that inbreeding is below the fixed level (5% per generation) without a significant loss of response, in comparison with classical strategies, where inbreeding is not restricted. A substantial reduction of inbreeding was found with the use of matings having minimal coancestry. However, this reduction was due principally to a delay of 1 generation in the appearance of inbreeding. Linear programing was also efficient in achieving these aims. It is, in principle, more flexible than the other strategies, but its heavy cost of computation is a disadvantage, and, in practice, comparable results can probably be obtained using much simpler strategies. MenosA reasonable objective for selection programs in small populations is the maximization of response, with a restriction on the increase of inbreeding. This restriction will be especially important when information on relatives is used for evaluation of candidates for selection. To achieve this objective, different strategies have been proposed: (i) to reduce the intensity of selection; (ii) to lower the weight given to family information in an index below the optimal value; (iii) to restrict the variation of family size, (iv) to make matings between the selected animals, so as to minimize the average coancestry coefficient; and (v) to find a general solution using linear programing. These strategies have been illustrated by genetic simulation of a simple example. The population consisted of 8 males and 8 females selected from 32 animals evaluated in each sex. The candidates were evaluated by an index using information on the individual and its 7 sibs. Five generations of selection were practised. It was concluded that there are several alternative strategies which ensure that inbreeding is below the fixed level (5% per generation) without a significant loss of response, in comparison with classical strategies, where inbreeding is not restricted. A substantial reduction of inbreeding was found with the use of matings having minimal coancestry. However, this reduction was due principally to a delay of 1 generation in the appearance of inbreeding. Linear programing was also effi... Mostrar Tudo |
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Palavras-Chave: |
Consanguinidade restrita. |
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Thesagro: |
Endogamia. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
null
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Registro original: |
Embrapa Florestas (CNPF) |
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| Registros recuperados : 8 | |
| 1. |  | FREITAS, J. C. de; POZZER, L.; REZENDE, J. A. M.; KITAJIMA, E. W.; AVILA, A. C. de; RESENDE, R. de O. Lisianthus: a new ornamental affected by tomato spotted wilt virus in Brazil. Fitopatologia Brasileira, Brasilia, v.22, n.1, p.114, mar. 1997.| Biblioteca(s): Embrapa Hortaliças. |
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| 2. | | PAIVA, C. L.; VIANA, A. P.; SILVA, R. N. O.; SANTOS, E. A.; FREITAS, J. C. de O.; OLIVEIRA, E. J. de. Diversidade genética entre acessos de espécies de passiflora utilizando caracteres morfológicos. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 22., 2012, Bento Gonçalves. Anais... Bento Gonçalves: SBF, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 3. | | PAIVA, C. L.; VIANA, A. P.; SANTOS, E. A.; FREITAS, J. C. de O.; SILVA, R. N. O.; OLIVEIRA, E. J. de. Genetic variability assessment in the genus Passiflora by SSR markers. Chilean Journal of Agricultural Research, v. 74, n.3, July/September, 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 4. | | OLIVEIRA, J. S.; FERNANDES, S. C. R.; SCHWARTZ, C. A.; BLOCH JUNIOR, C.; MELO, J. A. T.; PIRES JUNIOR, O. R.; FREITAS, J. C. de. Toxicity and toxin identification in Colomesus asellus, an Amazonian (Brazil) freshwater puffer fish. Toxicon, v. 48, p. 55-63, 2006.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: -- - A |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 5. | | OLIVEIRA, E. B. de; SOUSA, L. P. de; FROUFE, L. C. M.; AGUIAR, A. V. de; LEMBERGER, E.; SANTOS, L. M. F. dos; FREITAS, J. C. de; GOBOR, D.; SCHAITZA, E. G.; MAXIMIANO, G. A.; CHANG, M. Avaliação de uma floresta de espécies nativas formada em sub-bosque de plantação de eucalipto, no noroeste do Estado do Paraná. In: SEMINÁRIO NACIONAL SOBRE DINÂMICAS DE FLORESTAS, 1., 2008, Curitiba. Anais. Colombo: Embrapa Florestas, 2008. 1 CD-ROM. Resumo 49.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 6. | | HASHIMOTO, V. Y.; DIAS, J. A.; CHIDEROLI, R. T.; BARBARA, J. C. A.; BUNHARO, T. B.; DUTRA, L. H.; SILVA, M. do C. P.; MULLER, E. E.; FREITAS, J. C. de. Epidemiological status of bovine leptospirosis in the State of Paraná, Brazil. Semina: Ciências Agrárias, Londrina, v. 36, n. 6, suplemento 2, p. 4341-4356, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Rondônia. |
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| 7. | | SILVA, N. P. da; PEREIRA, E. do C. R. L.; DUARTE, L. M.; FREITAS, J. C. de O.; ALMEIDA, C. G. de; SILVA, T. P. da; MELO, R. C. N.; APOLONIO, A. C. M.; OLIVEIRA, M. A. L. de; BRANDAO, H. de M.; PITTELLA, F.; FABRI, R. L.; TAVARES, G. D.; PINTO, P. de F. Improved anti-Cutibacterium acnes activity of tea tree oil-loaded chitosan-poly(ε-caprolactone) core-shell nanocapsules. Colloids and Surfaces B: Biointerfaces, v. 196, 111371, 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Gado de Leite. |
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| 8. | | SCHAITZA, E. G.; SHANG, M.; OLIVEIRA, E. B. de; LIMBERGER, E.; SANTOS, L. M. F. dos; SHIMIZU, J. Y.; GOBOR, D.; SIQUEROLO, E. F.; MAXIMIANO, G. A.; AGUIAR, A. V. de; SOUSA, L. P. de; BIANCO, A. de J.; SANTOS, E. S. dos; PASSARELLI, I.; FREITAS, J. C. de; DOMINGUES, R.; GONÇALVES, A. R.; GARBELINI, W. A.; SANTOS, J. F. dos; MORIS, A. C.; SABOT, A. L.; SANTOS, A. S. dos. Implantação e manejo de florestas em pequenas propriedades no Estado do Paraná: um modelo para a conservação ambiental, com inclusão social e viabilidade econômica. Colombo: Embrapa Florestas, 2008. 49 p. (Embrapa Florestas. Documentos, 167).| Biblioteca(s): Embrapa Florestas. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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