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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
25/08/2010 |
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Data da última atualização: |
26/04/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PESSOA FILHO, M. A. C. de P.; RANGEL, P. H. N.; FERREIRA, M. E. |
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Afiliação: |
MARCO AURELIO CALDAS DE PINHO PESSO, CPAC; PAULO HIDEO NAKANO RANGEL, CNPAF; MARCIO ELIAS FERREIRA, CENARGEN. |
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Título: |
Extracting samples of high diversity from thematic collections of large gene banks using a genetic-distance based approach. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
BMC Plant Biology, v. 10, n. 127, 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Background
Breeding programs are usually reluctant to evaluate and use germplasm accessions other than the elite materials belonging to their advanced populations. The concept of core collections has been proposed to facilitate the access of potential users to samples of small sizes, representative of the genetic variability contained within the gene pool of a specific crop. The eventual large size of a core collection perpetuates the problem it was originally proposed to solve. The present study suggests that, in addition to the classic core collection concept, thematic core collections should be also developed for a specific crop, composed of a limited number of accessions, with a manageable size.
Results
The thematic core collection obtained meets the minimum requirements for a core sample - maintenance of at least 80% of the allelic richness of the thematic collection, with, approximately, 15% of its size. The method was compared with other methodologies based on the M strategy, and also with a core collection generated by random sampling. Higher proportions of retained alleles (in a core collection of equal size) or similar proportions of retained alleles (in a core collection of smaller size) were detected in the two methods based on the M strategy compared to the proposed methodology. Core sub-collections constructed by different methods were compared regarding the increase or maintenance of phenotypic diversity. No change on phenotypic diversity was detected by measuring the trait "Weight of 100 Seeds", for the tested sampling methods. Effects on linkage disequilibrium between unlinked microsatellite loci, due to sampling, are discussed.
Conclusions
Building of a thematic core collection was here defined by prior selection of accessions which are diverse for the trait of interest, and then by pairwise genetic distances, estimated by DNA polymorphism analysis at molecular marker loci. The resulting thematic core collection potentially reflects the maximum allele richness with the smallest sample size from a larger thematic collection. As an example, we used the development of a thematic core collection for drought tolerance in rice. It is expected that such thematic collections increase the use of germplasm by breeding programs and facilitate the study of the traits under consideration. The definition of a core collection to study drought resistance is a valuable contribution towards the understanding of the genetic control and the physiological mechanisms involved in water use efficiency in plants. MenosBackground
Breeding programs are usually reluctant to evaluate and use germplasm accessions other than the elite materials belonging to their advanced populations. The concept of core collections has been proposed to facilitate the access of potential users to samples of small sizes, representative of the genetic variability contained within the gene pool of a specific crop. The eventual large size of a core collection perpetuates the problem it was originally proposed to solve. The present study suggests that, in addition to the classic core collection concept, thematic core collections should be also developed for a specific crop, composed of a limited number of accessions, with a manageable size.
Results
The thematic core collection obtained meets the minimum requirements for a core sample - maintenance of at least 80% of the allelic richness of the thematic collection, with, approximately, 15% of its size. The method was compared with other methodologies based on the M strategy, and also with a core collection generated by random sampling. Higher proportions of retained alleles (in a core collection of equal size) or similar proportions of retained alleles (in a core collection of smaller size) were detected in the two methods based on the M strategy compared to the proposed methodology. Core sub-collections constructed by different methods were compared regarding the increase or maintenance of phenotypic diversity. No change on phenotypic diversity was detected by me... Mostrar Tudo |
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Palavras-Chave: |
Melhoramento genético; Variabilidade genética. |
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Thesagro: |
Genética; Germoplasma; Polimorfismo genético. |
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Categoria do assunto: |
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Marc: |
LEADER 03194naa a2200205 a 4500
001 1860873
005 2019-04-26
008 2010 bl --- 0-- u #d
100 1 $aPESSOA FILHO, M. A. C. de P.
245 $aExtracting samples of high diversity from thematic collections of large gene banks using a genetic-distance based approach.
260 $c2010
520 $aBackground Breeding programs are usually reluctant to evaluate and use germplasm accessions other than the elite materials belonging to their advanced populations. The concept of core collections has been proposed to facilitate the access of potential users to samples of small sizes, representative of the genetic variability contained within the gene pool of a specific crop. The eventual large size of a core collection perpetuates the problem it was originally proposed to solve. The present study suggests that, in addition to the classic core collection concept, thematic core collections should be also developed for a specific crop, composed of a limited number of accessions, with a manageable size. Results The thematic core collection obtained meets the minimum requirements for a core sample - maintenance of at least 80% of the allelic richness of the thematic collection, with, approximately, 15% of its size. The method was compared with other methodologies based on the M strategy, and also with a core collection generated by random sampling. Higher proportions of retained alleles (in a core collection of equal size) or similar proportions of retained alleles (in a core collection of smaller size) were detected in the two methods based on the M strategy compared to the proposed methodology. Core sub-collections constructed by different methods were compared regarding the increase or maintenance of phenotypic diversity. No change on phenotypic diversity was detected by measuring the trait "Weight of 100 Seeds", for the tested sampling methods. Effects on linkage disequilibrium between unlinked microsatellite loci, due to sampling, are discussed. Conclusions Building of a thematic core collection was here defined by prior selection of accessions which are diverse for the trait of interest, and then by pairwise genetic distances, estimated by DNA polymorphism analysis at molecular marker loci. The resulting thematic core collection potentially reflects the maximum allele richness with the smallest sample size from a larger thematic collection. As an example, we used the development of a thematic core collection for drought tolerance in rice. It is expected that such thematic collections increase the use of germplasm by breeding programs and facilitate the study of the traits under consideration. The definition of a core collection to study drought resistance is a valuable contribution towards the understanding of the genetic control and the physiological mechanisms involved in water use efficiency in plants.
650 $aGenética
650 $aGermoplasma
650 $aPolimorfismo genético
653 $aMelhoramento genético
653 $aVariabilidade genética
700 1 $aRANGEL, P. H. N.
700 1 $aFERREIRA, M. E.
773 $tBMC Plant Biology$gv. 10, n. 127, 2010.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 369 | |
| 161. |  | LOPES, F. F. R.; KRATKA, P. C.; BIANCHETTI, L.; FERREIRA, M. E.; AMARAL, Z. P.; BUSO, G. S. C. Análise genética de novas espécies de capsicum e sua relação com espécies cultivadas do gênero, através de marcadores moleculares. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 7., 2002, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2002. p. 59.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 162. | | RANGEL, P. H. N.; BUSO, G. S. C.; BRONDANI, C.; GUIMARÃES, E. P.; RANGEL, P. N.; FERREIRA, M. E. Coleta, caracterização e uso de germoplasma silvestre de arroz diplóide e tetraplóide (Oryza spp.) nativo do Brasil no melhoramento genético. In: WALTER, B. M. T.; CAVALCANTI, T. B. (Ed.). Fundamentos para a coleta de germoplasma vegetal. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2005. p. 585-631.| Tipo: Capítulo em Livro Técnico-Científico | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 163. | | TERRA, T. G. R.; RODRIGUES, L. L.; RANGEL, P. H. N.; ABREU, A. G. de; FERREIRA, M. E. Fenotipagem do sistema radicular em uma coleção nuclear de arroz de terras altas. In: SEMINÁRIO JOVENS TALENTOS, 7., 2013, Santo Antônio de Goiás. Coletânea dos resumos apresentados. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2013. p. 97. (Embrapa Arroz e Feijão. Documentos, 292). Pôster - pós-graduação.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 164. | | SILVA, N. J. M. L.; LINS, T. C. L.; AMARAL, Z.; RANGEL, P. H. N.; FERREIRA, M. E. Fingerprinting de DNA na avaliação de duplicações de genótipos no banco de germoplasma de arroz (Oryza sativa L.). In: WORKSHOP DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 4., 1999, Brasília. Anais: resumos dos trabalhos. Brasília, DF: EMBRAPA-CENARGEN, 1999. p. 83.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 165. | | LEITE, J. N. F.; CRUZ, M. C. P. da; FERREIRA, M. E.; ANDRIOLI, I.; BRAOS, L. V. Frações orgânicas e inorgânicas do fósforo no solo influenciadas por plantas de cobertura e adubação nitrogenada. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 11, p. 1880-1889, nov. 2016. Título em inglês: Organic and inorganic P forms in soil as affected by cover crops and nitrogen fertilization.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 166. | | BUSO, G. S. C.; BOITEUX, L. S.; BIANCHETTI, L.; REIFSCHNEIDER, F. J. B.; LOPES, C. A.; FERREIRA, M. E. Germplasm diversity, disease resistance and quality trait analysis of Capsicum species using molecular tools. In: INTERNATIONAL CONFERENCE ON THE STATUS OF PLANT, ANIMAL & MICROBE GENOMES RESEARCH, 10., 2002, San Diego. San Diego: BIOSYSTEMS, 2002. p. 70.| Biblioteca(s): Embrapa Hortaliças. |
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| 167. | | PESSOA-FILHO, M.; LINS, T. C. de L.; RABELLO, A. R.; MEHTA, A.; RANGEL, P. H. N.; FERREIRA, M. E. Genomic regions associated with drought tolerance in upland rice landraces: linking experimental data from QTL mapping and EST sequencing. In: SIMPÓSIO BRASILEIRO DE GENÉTICA MOLECULAR DE PLANTAS, 3., 2011, Ilhéus. Anais... [S.l.]: SBG, 2011. p. 21| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 168. | | PESSOA-FILHO, M.; LINS, T. C. L.; RABELLO, A. R.; MEHTA, A.; RANGEL, P. H. N.; FERREIRA, M. E. Genomic regions associated with drought tolerance in upland rice landraces: linking experimental data from QTL mapping and EST sequencing. In: SIMPÓSIO BRASILEIRO DE GENÉTICA MOLECULAR DE PLANTAS, 3., 2011, Ilhéus. Anais... [S.l.]: SBG, 2011. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Cerrados. |
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| 170. | | NAKAMURA, E. K.; FERREIRA, M. E.; FUTIWAKI, T. R.; PORTO, A. J. V.; INAMASU, R. Y.; GUIMARAES, J. O. Editor de redes de petri: desenvolvimento e implementacao. In: SIMPOSIO DE INICIACAO CIENTIFICA DA UNIVERSIDADE DE SAO PAULO, 3., dez. 1995, Sao Carlos, SP. Resumos... Sao Carlos: USP-EESC, 1995. v.2 p.349. Ref.7.83.| Biblioteca(s): Embrapa Instrumentação. |
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| 172. | | RITSCHEL, P. S.; REVERS, L. F.; LEITE, G. B.; FERREIRA, M. E.; OLIVEIRA, P. R. D. de. Genetic analysis of accessions in a pear germplasm bank. In: INTERNATIONAL PEAR SYMPOSIUM, 10., 2007, Peniche. Programme and abstracts. [Alcobaça, Portugal: ISHS], 2007. p. 40. Resumo PO 37.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 173. | | DE BEM, I. O.; ANJOS, L. M. dos; RITSCHEL, P. S.; COELHO, A. G. S.; FERREIRA, M. E. Genetic diversity of apirenic vitis accessions of a germplasm bank. Journal of Basic and Applied Genetics, Buenos Aires, v. 23, p. 271, 2012. Suplemento. Resumo apresentado nos anais no XV Congreso Latinoamericano de Genética, 2012, Rosário, Argentina.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 174. | | ARAYA, S.; FALEIRO, F. G.; JUNQUEIRA, N. T. V.; MARTINS, A. M.; COSTA, A. M.; FERREIRA, M. E. Desenvolvimento de marcadores microssatélites por meio do sequenciamento parcial do genoma de maracujá-azedo (Passiflora Edulis Sims) e transferibilidade para 78 espécies do gênero passiflora. In: SIMPÓSIO MELHORAMENTO DE PLANTAS, 2016, Brasília, DF. Variabilidade genética, ferramentas e mercado: anais. Brasília, DF: Sociedade Brasileira de Melhoramento de Plantas, 2016. p. 19 Biotecnologia (Menção Honrosa).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Cerrados. |
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| 176. | | LACERDA, T. S.; TOGAWA, R. C.; PAPPAS JUNIOR. G. J.; RANGEL, P. H. N.; FERREIRA, M. E. Desenvolvimento de painéis multiplex de marcadores microssatélites para programas de melhoramento assistido para qualidade de grãos em arroz. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 130. p. 180.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 177. | | LACERDA, T. S.; TOGAWA, R. C.; PAPPAS JUNIOR. G. J.; RANGEL, P. H. N.; FERREIRA, M. E. Desenvolvimento de painéis multiplex de marcadores microssatélites para programas de melhoramento assistido para qualidade de grãos em arroz. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. p. 180. Resumo 130.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 178. | | BUSO, G. S. C.; AMARAL, Z. P.; BRONDANI, R. V.; REIS, A. M. M.; MORETZSOHN, M. C.; FERREIRA, M. E. Desenvolvimento de primers SSR para Phaseolus vulgaris. In: SIMPOSIO DE RECURSOS GENETICOS PARA AMERICA LATINA E CARIBE, 2., 1999, Brasilia, DF. Anais... Brasilia: Embrapa Recursos Geneticos e Biotecnologia, 1999. CD-ROM.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 179. | | BELO, A.; CAVALHEIRO, S. T.; AMARAL, Z. P.; FERREIRA, M. E.; GUIMARAES, E. P.; RANGEL, P. H. N. Correlation between genetic distance of parents and heterosis in rice (Oryza sativa L.). In: ENCONTRO LATINO-AMERICANO DE BIOTECNOLOGIA VEGETAL: REDBIO, 4., 2001, Goiânia. Programa e resumos. [S.l.:s.n.], 2001. p. 155. Seção resumos.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 180. | | BELÓ, A.; CAVALHEIRO, S. T.; AMARAL, Z. P.; FERREIRA, M. E.; GUIMARÃES, E. P.; RANGEL, P. H. N. Correlation between genetic distance of parents and heterosis in rice (Oryza sativa L.). In: ENCONTRO LATINO-AMERICANO DE BIOTECNOLOGIA VEGETAL, 4., 2001, Goiania. Programa e resumos. Goiânia: Universidade Federal de Goiânia, 2001. p. 155. Seção resumos.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 369 | |
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