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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
06/10/2008 |
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Data da última atualização: |
18/08/2023 |
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Autoria: |
BERNARDO, R. |
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Título: |
Selection response with marker-based assortative mating. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Crop Science, v. 39, n. 1, p. 69-73, Jan./Feb. 1999. |
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DOI: |
https://doi.org/10.2135/cropsci1999.0011183X003900010011x |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Assortative mating can increase additive variance (VA) and, consequently, selection response. Marker-based assortative mating (MAM? the mating of individuals that have similar marker genotypes?has not been studied. My objectives in this simulation study were to (i) compare the selection response associated with MAM, phenotypic assortative mating (PAM), and random mating (RM) of selected individuals and (ii) determine when MAM will be most useful breeding programs. I simulated 25 generations of selection among 200 individuals, followed by MAM, PAM, or RM, in a cross between two inbreds. A total of 100 codominant marker loci and 100 quantitative trait loci (QTL) were randomly distributed across 10 chromosomes, each 100 centimorgans (cM) long. The effects of QTL were additive and followed an exponential distribution. Cumulative selection response was determined for different initial levels of heritability (h2 = 0.20, 0.50, and 0.80) and different numbers of individuals selected (N = 4, 8,16, and 32) in each generation. Compared with RM, MAM resulted in slight increases of 3 to 8% in selection response during the first several generations, particularly when h2 = 0.20 and N = 32. The PAM procedure led to slight increases of 2 to 4% when h2 = 0.80 and N = 32. Any advantage of assortative mating over RM dissipated by Generation 8 for MAM and Generation 15 for PAM. The loss of QTL heterozygosity was much greater with MAM than with PAM or RM. For long-term improvement, selected individuals should be intermated by RM. The MAM procedure will be most useful for short-term improvement in a biparental cross, particularly when h2 and selection pressure are low. MenosAbstract: Assortative mating can increase additive variance (VA) and, consequently, selection response. Marker-based assortative mating (MAM? the mating of individuals that have similar marker genotypes?has not been studied. My objectives in this simulation study were to (i) compare the selection response associated with MAM, phenotypic assortative mating (PAM), and random mating (RM) of selected individuals and (ii) determine when MAM will be most useful breeding programs. I simulated 25 generations of selection among 200 individuals, followed by MAM, PAM, or RM, in a cross between two inbreds. A total of 100 codominant marker loci and 100 quantitative trait loci (QTL) were randomly distributed across 10 chromosomes, each 100 centimorgans (cM) long. The effects of QTL were additive and followed an exponential distribution. Cumulative selection response was determined for different initial levels of heritability (h2 = 0.20, 0.50, and 0.80) and different numbers of individuals selected (N = 4, 8,16, and 32) in each generation. Compared with RM, MAM resulted in slight increases of 3 to 8% in selection response during the first several generations, particularly when h2 = 0.20 and N = 32. The PAM procedure led to slight increases of 2 to 4% when h2 = 0.80 and N = 32. Any advantage of assortative mating over RM dissipated by Generation 8 for MAM and Generation 15 for PAM. The loss of QTL heterozygosity was much greater with MAM than with PAM or RM. For long-term improvement, sele... Mostrar Tudo |
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Palavras-Chave: |
Melhoramento genético vegeal; Quantitative trait loci mapping; Selection responses. |
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Thesagro: |
Marcador Molecular; Planta Forrageira; Seleção Genética. |
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Thesaurus Nal: |
Genetic markers; Genotype; Plant breeding; Plant genetic resources; Plant genetics; Quantitative trait loci. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02551naa a2200277 a 4500
001 1533764
005 2023-08-18
008 1999 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.2135/cropsci1999.0011183X003900010011x$2DOI
100 1 $aBERNARDO, R.
245 $aSelection response with marker-based assortative mating.$h[electronic resource]
260 $c1999
520 $aAbstract: Assortative mating can increase additive variance (VA) and, consequently, selection response. Marker-based assortative mating (MAM? the mating of individuals that have similar marker genotypes?has not been studied. My objectives in this simulation study were to (i) compare the selection response associated with MAM, phenotypic assortative mating (PAM), and random mating (RM) of selected individuals and (ii) determine when MAM will be most useful breeding programs. I simulated 25 generations of selection among 200 individuals, followed by MAM, PAM, or RM, in a cross between two inbreds. A total of 100 codominant marker loci and 100 quantitative trait loci (QTL) were randomly distributed across 10 chromosomes, each 100 centimorgans (cM) long. The effects of QTL were additive and followed an exponential distribution. Cumulative selection response was determined for different initial levels of heritability (h2 = 0.20, 0.50, and 0.80) and different numbers of individuals selected (N = 4, 8,16, and 32) in each generation. Compared with RM, MAM resulted in slight increases of 3 to 8% in selection response during the first several generations, particularly when h2 = 0.20 and N = 32. The PAM procedure led to slight increases of 2 to 4% when h2 = 0.80 and N = 32. Any advantage of assortative mating over RM dissipated by Generation 8 for MAM and Generation 15 for PAM. The loss of QTL heterozygosity was much greater with MAM than with PAM or RM. For long-term improvement, selected individuals should be intermated by RM. The MAM procedure will be most useful for short-term improvement in a biparental cross, particularly when h2 and selection pressure are low.
650 $aGenetic markers
650 $aGenotype
650 $aPlant breeding
650 $aPlant genetic resources
650 $aPlant genetics
650 $aQuantitative trait loci
650 $aMarcador Molecular
650 $aPlanta Forrageira
650 $aSeleção Genética
653 $aMelhoramento genético vegeal
653 $aQuantitative trait loci mapping
653 $aSelection responses
773 $tCrop Science$gv. 39, n. 1, p. 69-73, Jan./Feb. 1999.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 8 | |
| 3. |  | BERNARDO, R.; SOUZA FILHO, H. M. de; VINHOLIS, M. de M. B.; CARRER, M. J. Sustentabilidade e adoção de sistemas de produção integrada com atividades agrícolas, pecuária bovina e florestais: uma revisão da literatura. In: CONGRESSO DA SOCIEDADE BRASILEIRA DE ECONOMIA, ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 56., 2018, Campinas, SP. Anais... Campinas, SP: SOBER, 2018.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 4. | | VINHOLIS, M. de M. B.; SOUZA FILHO, H. M. de; CARRER, M. J.; BARIONI JUNIOR, W.; BERNARDO, R. Características dos adotantes dos sistemas de integração lavoura-pecuária-floresta. In: CONGRESSO DA SOCIEDADE BRASILEIRA DE ECONOMIA, ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 56., 2018, Campinas, SP. Anais... Campinas, SP: SOBER, 2018.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 5. | | VINHOLIS, M. de M. B.; CARRER, M. J.; SOUZA FILHO, H. M. de; BERNARDO, R.; BARIONI JUNIOR, W. Fatores determinantes da adoção dos sistemas de integração lavoura-pecuária-floresta no estado de São Paulo. In: CONGRESSO DA SOCIEDADE BRASILEIRA DE ECONOMIA, ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 56., 2018, Campinas, SP. Anais... Campinas, SP: SOBER, 2018.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 7. | | CAETANO, G. G.; VINHOLIS, M. de M. B.; BARIONI JUNIOR, W.; CARRER, M. J.; BERNARDO, R.; SOUZA FILHO, H. M. de. Análise de correspondência múltipla para caracterização do perfil de adotantes de sistemas de integração. In: SIMPÓSIO BRASILEIRO DE PROBABILIDADE E ESTATÍSTICA, 23., 2018, São Pedro, SP. Anais...São Pedro, SP: ABE, 2018. Apresentação em Poster Científico.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 8. | | VINHOLIS, M. de M. B.; SOUZA FILHO, H. M. de S.; CARRE, M. J.; BARIONI JUNIOR, W.; BERNARDO, R.; CASACA, A. A.; ROJAS, D. C.; TOKUDA, F. S.; PELINSON, G. J. B.; SANTOS JUNIOR, A. dos; GONÇALES JÚNIOR, I. D.; ANDRAUS, J. T. K.; JUSTO, J. S.; MARTINES, L.; GUERREIRO, M. F.; FADEL, S. A. de O.; BORGES, W. L. B. Adoção de sistemas de integração lavoura-pecuária-floresta (ILPF) em São Paulo. São Carlos, SP: Embrapa Pecuária Sudeste, 2020. 56 p. (Embrapa Pecuária Sudeste. Boletim de Pesquisa e Desenvolvimento, 47).| Tipo: Boletim de Pesquisa e Desenvolvimento |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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