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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
09/05/2017 |
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Data da última atualização: |
10/05/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
LIMA, J. C. de S.; SOUSA, L. M. de; MOTA, J. H.; RESENDE, G. M. de; YURI, J. E. |
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Afiliação: |
JÚNIO CÉSAR DE SOUZA LIMA, Universidade Federal de Goiás – Regional Jataí; LETÍCIA MARTINS DE SOUSA, Universidade Federal de Goiás – Regional Jataí; JOSÉ HORTÊNCIO MOTA, Universidade Federal de Goiás – Regional Jataí; GERALDO MILANEZ DE RESENDE, CPATSA; JONY EISHI YURI, CPATSA. |
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Título: |
Desempenho de cultivares de alface do grupo crespa em Jataí-GO. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: ENCONTRO LATINO AMERICANO DE INICIAÇÃO CIENTÍFICA, 20.; ENCONTRO LATINO AMERICANO DE PÓS-GRADUAÇÃO, 16.; ENCONTRO LATINO AMERICANO DE INICIAÇÃO CIENTÍFICA JÚNIOR, 10.; ENCONTRO DE INICIAÇÃO À DOCÊNCIA, 6., 2016, São José dos Campos. Educação e ciência para a cidadania global: [anais]. São José dos Campos: Universidade do Vale do Paraíba, 2016. |
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Idioma: |
Português |
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Conteúdo: |
A alface é considerada a hortaliça folhosa mais consumida no Brasil, sendo que a escolha e determinação das cultivares a serem plantadas nas diferentes regiões, influência diretamente na produtividade da mesma. Objetivou-se com esse trabalho avaliar o comportamento de cinco cultivares de alface (Brida, Amanda, Cristal, Invicta e Verônica) do grupo solta crespa nas condições de Jataí-GO. O experimento foi instalado em delineamento de blocos casualizados com 4 repetições. As características avaliadas foram: altura e diâmetro de planta, número total de folhas, diâmetro e comprimento do caule, massa fresca total, comercial e do caule e percentual de massa seca. Verificou-se que apenas as características altura de plantas, comprimento do caule, diâmetro do caule, massa fresca do caule e massa fresca comercial apresentaram diferenças estatísticas em relação às cultivares avaliadas. As cultivares que apresentaram os maiores valores de massa fresca comercial foram Brida, Cristal e Verônica |
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Palavras-Chave: |
Cultivo. |
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Thesagro: |
Alface; Hortaliça; Hortaliça Folhosa. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/159646/1/Milanez-2016.pdf
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Marc: |
LEADER 01915nam a2200205 a 4500
001 2069390
005 2017-05-10
008 2016 bl uuuu u00u1 u #d
100 1 $aLIMA, J. C. de S.
245 $aDesempenho de cultivares de alface do grupo crespa em Jataí-GO.$h[electronic resource]
260 $aIn: ENCONTRO LATINO AMERICANO DE INICIAÇÃO CIENTÍFICA, 20.; ENCONTRO LATINO AMERICANO DE PÓS-GRADUAÇÃO, 16.; ENCONTRO LATINO AMERICANO DE INICIAÇÃO CIENTÍFICA JÚNIOR, 10.; ENCONTRO DE INICIAÇÃO À DOCÊNCIA, 6., 2016, São José dos Campos. Educação e ciência para a cidadania global: [anais]. São José dos Campos: Universidade do Vale do Paraíba$c2016
520 $aA alface é considerada a hortaliça folhosa mais consumida no Brasil, sendo que a escolha e determinação das cultivares a serem plantadas nas diferentes regiões, influência diretamente na produtividade da mesma. Objetivou-se com esse trabalho avaliar o comportamento de cinco cultivares de alface (Brida, Amanda, Cristal, Invicta e Verônica) do grupo solta crespa nas condições de Jataí-GO. O experimento foi instalado em delineamento de blocos casualizados com 4 repetições. As características avaliadas foram: altura e diâmetro de planta, número total de folhas, diâmetro e comprimento do caule, massa fresca total, comercial e do caule e percentual de massa seca. Verificou-se que apenas as características altura de plantas, comprimento do caule, diâmetro do caule, massa fresca do caule e massa fresca comercial apresentaram diferenças estatísticas em relação às cultivares avaliadas. As cultivares que apresentaram os maiores valores de massa fresca comercial foram Brida, Cristal e Verônica
650 $aAlface
650 $aHortaliça
650 $aHortaliça Folhosa
653 $aCultivo
700 1 $aSOUSA, L. M. de
700 1 $aMOTA, J. H.
700 1 $aRESENDE, G. M. de
700 1 $aYURI, J. E.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
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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Circulação/Nível: |
A - 1 |
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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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