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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
07/02/2014 |
Data da última atualização: |
19/10/2022 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
BOARI, A. de J.; CARVALHO, T. P.; SILVA, C. B. T.; SILVA, M. L. A. da. |
Afiliação: |
ALESSANDRA DE JESUS BOARI, CPATU; Taise Pereira Carvalho, UFRA; CLENILDA TOLENTINO B DA SILVA, CPATU; MANOEL LUIZ ANDRADE DA SILVA, CPATU. |
Título: |
Waitea circinata associado à podridão da folha flecha da palma de óleo. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MICOLOGIA, 7., 2013, Belém, PA. Livro de Resumos... Belém, PA: Sociedade Brasileira de Micologia, 2013. |
Páginas: |
p. 133. |
Idioma: |
Português |
Palavras-Chave: |
Palma de óleo. |
Thesagro: |
Dendê; Doença; Fungo. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/96750/1/Micologia3.pdf
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Marc: |
LEADER 00640nam a2200193 a 4500 001 1979161 005 2022-10-19 008 2013 bl uuuu u00u1 u #d 100 1 $aBOARI, A. de J. 245 $aWaitea circinata associado à podridão da folha flecha da palma de óleo.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE MICOLOGIA, 7., 2013, Belém, PA. Livro de Resumos... Belém, PA: Sociedade Brasileira de Micologia$c2013 300 $ap. 133. 650 $aDendê 650 $aDoença 650 $aFungo 653 $aPalma de óleo 700 1 $aCARVALHO, T. P. 700 1 $aSILVA, C. B. T. 700 1 $aSILVA, M. L. A. da
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Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
16/11/2010 |
Data da última atualização: |
02/09/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
PESSOA-FILHO, M.; RANGEL, P. H. N.; FERREIRA, M. E. |
Afiliação: |
MARCO PESSOA-FILHO, UNB; PAULO HIDEO NAKANO RANGEL, CNPAF; MARCIO ELIAS FERREIRA, CENARGEN. |
Título: |
Extracting samples of high diversity from thematic collections of large gene banks using a genetic-distance based approach. |
Ano de publicação: |
2010 |
Fonte/Imprenta: |
BMC Plant Biology, v. 10, 127, Jun. 2010. |
DOI: |
https://doi.org/10.1186/1471-2229-10-127 |
Idioma: |
Inglês |
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 measu... Mostrar Tudo |
Palavras-Chave: |
Core collection; Variabilidade genética. |
Thesagro: |
Arroz; Banco de germoplasma; Biodiversidade; Melhoramento Genético Vegetal; Oryza sativa. |
Thesaurus NAL: |
Gene banks. |
Categoria do assunto: |
S Ciências Biológicas |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/23588/1/BMC.pdf
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Marc: |
LEADER 03334naa a2200253 a 4500 001 1867069 005 2022-09-02 008 2010 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1186/1471-2229-10-127$2DOI 100 1 $aPESSOA-FILHO, M. 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 $aGene banks 650 $aArroz 650 $aBanco de germoplasma 650 $aBiodiversidade 650 $aMelhoramento Genético Vegetal 650 $aOryza sativa 653 $aCore collection 653 $aVariabilidade genética 700 1 $aRANGEL, P. H. N. 700 1 $aFERREIRA, M. E. 773 $tBMC Plant Biology$gv. 10, 127, Jun. 2010.
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