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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
14/09/2012 |
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Data da última atualização: |
25/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, E. J. de; RESENDE, M. D. V. de; SANTOS, V. da S.; FERREIRA, C. F.; OLIVEIRA, G. A. F.; SILVA, M. S. da; OLIVEIRA, L. A. de; VILDOSO, C. I. A. |
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Afiliação: |
EDER JORGE DE OLIVEIRA, CNPMF; MARCOS DEON VILELA DE RESENDE, CNPF; VANDERLEI DA SILVA SANTOS, CNPMF; CLAUDIA FORTES FERREIRA, CNPMF; GILMARA ALVARENGA FACHARDO OLIVEIRA, UFRB; MAIANE SUZARTE DA SILVA, UFRB; LUCIANA ALVES DE OLIVEIRA, CNPMF; CARLOS IVAN AGUILAR VILDOSO, CNPQ. |
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Título: |
Genome-wide selection in cassava. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Euphytica, jun. 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
The main objective of this study was to estimate the selection accuracy and to predict the genetic gain in cassava breeding using genomic selection methodologies. We evaluated 358 cassava genotypes for the following traits: shoot weight (SW), fresh root yield (FRY), starch fraction amylose content (AC), dry matter content (DMC), and starch yield (S-Y). Genotyping was performed using 390 single nucleotide polymorphisms (SNPs), which were used as covariates in the random regression-best linear unbiased prediction model for genomic selection. The heritability values detected by markers for the SW, FRY, AC, DMC, and S-Y traits were 0.25, 0.25, 0.03, 0.20, and 0.26, respectively. Because the low heritability detected for AC, this trait was eliminated from further analysis. Using only the most informative SNPs (118, 92, 56, and 97 SNPs for SW, FRY, DMC, and S-Y, respectively) we observed higher selection accuracy which were 0.83, 0.76, 0.67, and 0.77, respectively to SW, FRY, DMC, and S-Y. With these levels of accuracy and considering a selection cycle reduced by half the time, the theoretical gains with genomic selection compared to phenotypic selection for DMC, FRY, and SW would be 39.42 %, 56.90 %, and 73.96 %, espectively. These results indicate that in the cassava, genomic selection can substantially speed up selection cycles, thereby increasing gains per unit time. Although there are high expectations for incorporating this strategy into breeding programs, we still need to validate the model for other traits and evaluate whether the selection accuracy can be improved using more SNPs. MenosThe main objective of this study was to estimate the selection accuracy and to predict the genetic gain in cassava breeding using genomic selection methodologies. We evaluated 358 cassava genotypes for the following traits: shoot weight (SW), fresh root yield (FRY), starch fraction amylose content (AC), dry matter content (DMC), and starch yield (S-Y). Genotyping was performed using 390 single nucleotide polymorphisms (SNPs), which were used as covariates in the random regression-best linear unbiased prediction model for genomic selection. The heritability values detected by markers for the SW, FRY, AC, DMC, and S-Y traits were 0.25, 0.25, 0.03, 0.20, and 0.26, respectively. Because the low heritability detected for AC, this trait was eliminated from further analysis. Using only the most informative SNPs (118, 92, 56, and 97 SNPs for SW, FRY, DMC, and S-Y, respectively) we observed higher selection accuracy which were 0.83, 0.76, 0.67, and 0.77, respectively to SW, FRY, DMC, and S-Y. With these levels of accuracy and considering a selection cycle reduced by half the time, the theoretical gains with genomic selection compared to phenotypic selection for DMC, FRY, and SW would be 39.42 %, 56.90 %, and 73.96 %, espectively. These results indicate that in the cassava, genomic selection can substantially speed up selection cycles, thereby increasing gains per unit time. Although there are high expectations for incorporating this strategy into breeding programs, we still need to v... Mostrar Tudo |
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Palavras-Chave: |
Manihot esculenta Crantz. |
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Thesaurus Nal: |
breeding. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
null
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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| Registros recuperados : 8 | |
| 5. |  | CUNHA, A. O.; ARAGÃO, W. M.; MILANI, M.; PAULA NETO, V. de; ALMEIDA, A. C. O. de. Comportamento de cultivares de mamoneira em duas regiões ecogeográficas de Sergipe. In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 4., 2007, São Lourenço, MG, 2007.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Algodão. |
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| 6. | | CUNHA, A. O. C.; ARAGÃO, W. M.; MILANI, M.; PAULA NETO, V. de; ALMEIDA, A. C. O. de. Comportamento de cultivares de mamoneira no Semi-Árido sergipano. In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 4., 2007, São Lourenço, MG, 2007.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Algodão. |
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| 7. | | FREIRE, A. da C.; ARAGÃO, W. M.; SANTOS, M. do S. P.; ALMEIDA, A. C. O. de. Caracterização morfológica e agronômica do híbrido anão vermelho do Brasil de Gramame x gigante do oeste africano. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 17., ENCONTRO DE PÓS-GRADUAÇÃO, 3., 2007, São Cristóvão. Anais... São Cristovão: Universidade Federal de Sergipe, 2007. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 8. | | ALMEIDA, A. C. O. de; FREIRE, A. da C.; SANTOS, M. do S. P.; ARAGÃO, W. M. Caracterização de híbrido anão amarelo do Brasil de Gramame x gigante do oeste africano. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 17., ENCONTRO DE PÓS-GRADUAÇÃO, 3., 2007, São Cristóvão. Anais... São Cristovão: Universidade Federal de Sergipe, 2007. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| Registros recuperados : 8 | |
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