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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
02/04/2002 |
Data da última atualização: |
19/10/2023 |
Autoria: |
GUIMARAES, P. E. de O. |
Afiliação: |
PAULO EVARISTO DE O GUIMARAES, CNPMS. |
Título: |
Effects of a long-term recurrent selection program on the genetic structure of the BSSS maize population. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
2001. |
Páginas: |
99 p. |
Idioma: |
Inglês |
Notas: |
Tese (Doutorado) - Iowa State University, Ames. |
Conteúdo: |
Evaluating of Recurrent Selection (RS) programs can lead to increase knowledge of methods, populations, and traits and give support for better management of breeding programs. The objective herein was to evaluate the effects of seven cycles of half-sib selection followed by seven cycles of S2 selection on the genetic structure of BSSS maize population. Individuals from BSSSP (progenitor lines), BS13(S)CO (original S2 selection), and BS13(S)C7 (7th S2 cycle) cycles were genotyped based on a sample of 105 RFLP loci. Measures of genetic variation within (expected heterozygosity, number of allelles, average frequency of the most common allele, and proportion of polymorphic loci) and among (Principal Component Analysis and Nei's genetic distance, NGD) cycles of selection indicated BSSSP has a considerable genetic variability, substantial loss a variation and increase of divergence over the cycles of selection, greatest loss of diversity occurred during the HS selection program, future cycles of RS are predicted to have narrow genetic variation, and low average effective population size was an important factor in loss of genetic variation. Changes in allele frequencies for about 30% of the loci cannot be explained by genetic drift alone, suggesting that selection also was an important factor of variation. The majority of loci in C0 and C7 were in H-W equilibrium. Progenitor lines Illinois Hy had a lower NGD to C0 and C7 and five of its unique had frequencies significantly increased in later generations, indicating a selective advantage over the cycles of RS. Hybrid Hy x LE 23 showed the lowest NGD to C0 and C7 populations. NGD among parental lines was not a good predictor of single-crosses yield performance. A founder effect observed herein may explain partially reduced genetic gains during the S2-selection period reported in other studies. Limited RFLP diversity in BS13(S)C7 suggests this population may not have enough genetic variability to sustain significant long-term genetic gains per se for grain yield. RFLP data were useful tools to evaluate this RS program. However, much more information could be obtained about recurrent selection programs by integrating of molecular (a standard set of marker loci) and phenotypic data. MenosEvaluating of Recurrent Selection (RS) programs can lead to increase knowledge of methods, populations, and traits and give support for better management of breeding programs. The objective herein was to evaluate the effects of seven cycles of half-sib selection followed by seven cycles of S2 selection on the genetic structure of BSSS maize population. Individuals from BSSSP (progenitor lines), BS13(S)CO (original S2 selection), and BS13(S)C7 (7th S2 cycle) cycles were genotyped based on a sample of 105 RFLP loci. Measures of genetic variation within (expected heterozygosity, number of allelles, average frequency of the most common allele, and proportion of polymorphic loci) and among (Principal Component Analysis and Nei's genetic distance, NGD) cycles of selection indicated BSSSP has a considerable genetic variability, substantial loss a variation and increase of divergence over the cycles of selection, greatest loss of diversity occurred during the HS selection program, future cycles of RS are predicted to have narrow genetic variation, and low average effective population size was an important factor in loss of genetic variation. Changes in allele frequencies for about 30% of the loci cannot be explained by genetic drift alone, suggesting that selection also was an important factor of variation. The majority of loci in C0 and C7 were in H-W equilibrium. Progenitor lines Illinois Hy had a lower NGD to C0 and C7 and five of its unique had frequencies significantly increase... Mostrar Tudo |
Palavras-Chave: |
Maize. |
Thesagro: |
Melhoramento; Milho; Zea Mays. |
Thesaurus Nal: |
breeding. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/90316/1/T-Paulo-Evaristo.pdf
|
Marc: |
LEADER 02820nam a2200193 a 4500 001 1485209 005 2023-10-19 008 2001 bl uuuu m 00u1 u #d 100 1 $aGUIMARAES, P. E. de O. 245 $aEffects of a long-term recurrent selection program on the genetic structure of the BSSS maize population.$h[electronic resource] 260 $a2001.$c2001 300 $a99 p. 500 $aTese (Doutorado) - Iowa State University, Ames. 520 $aEvaluating of Recurrent Selection (RS) programs can lead to increase knowledge of methods, populations, and traits and give support for better management of breeding programs. The objective herein was to evaluate the effects of seven cycles of half-sib selection followed by seven cycles of S2 selection on the genetic structure of BSSS maize population. Individuals from BSSSP (progenitor lines), BS13(S)CO (original S2 selection), and BS13(S)C7 (7th S2 cycle) cycles were genotyped based on a sample of 105 RFLP loci. Measures of genetic variation within (expected heterozygosity, number of allelles, average frequency of the most common allele, and proportion of polymorphic loci) and among (Principal Component Analysis and Nei's genetic distance, NGD) cycles of selection indicated BSSSP has a considerable genetic variability, substantial loss a variation and increase of divergence over the cycles of selection, greatest loss of diversity occurred during the HS selection program, future cycles of RS are predicted to have narrow genetic variation, and low average effective population size was an important factor in loss of genetic variation. Changes in allele frequencies for about 30% of the loci cannot be explained by genetic drift alone, suggesting that selection also was an important factor of variation. The majority of loci in C0 and C7 were in H-W equilibrium. Progenitor lines Illinois Hy had a lower NGD to C0 and C7 and five of its unique had frequencies significantly increased in later generations, indicating a selective advantage over the cycles of RS. Hybrid Hy x LE 23 showed the lowest NGD to C0 and C7 populations. NGD among parental lines was not a good predictor of single-crosses yield performance. A founder effect observed herein may explain partially reduced genetic gains during the S2-selection period reported in other studies. Limited RFLP diversity in BS13(S)C7 suggests this population may not have enough genetic variability to sustain significant long-term genetic gains per se for grain yield. RFLP data were useful tools to evaluate this RS program. However, much more information could be obtained about recurrent selection programs by integrating of molecular (a standard set of marker loci) and phenotypic data. 650 $abreeding 650 $aMelhoramento 650 $aMilho 650 $aZea Mays 653 $aMaize
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
31/08/2021 |
Data da última atualização: |
03/01/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
ROSA C.; BACCARO, F.; CRONEMBERGER, C.; HIPÓLITO, J.; BARROS, C. F.; RODRIGUES, D. de J.; NECKEL-OLIVEIRA, S.; OVERBECK, G. E.; DRECHSLER-SANTOS, E. R.; ANJOS, M. R. dos; FERREGUETTI, A. C.; AKAMA, A.; MARTINS, M. B.; TOMAS, W. M.; SANTOS, S. A.; FERREIRA, V. L.; CUNHA, C. N. da; PENHA, J.; PINHO, J. B. de; SALIS, S. M.; DORIA, C. R. da C.; PILLAR, V. D.; PODGAISKI, L. R.; MENIN, M.; BÍGIO, N, C.; ARAGÓN, S.; MANZATTO, A. G.; VÉLEZ-MARTIN, E.; SILVA, A. C. B. L. e; IZZO, T. J.; MORTATI, A. F.; GIACOMIN, L. L.; ALMEIDA, T. E.; ANDRÉ, T.; SILVEIRA, M. A. P. de A.; SILVEIRA, A. L. P. da; MESSIAS, M. R.; MARQUES, M. C. M.; PADIAL, A. A.; MARQUES, R.; BITAR, Y. O. C.; SILVEIRA, M.; MORATO, E. F.; PAGOTTO, R. de C.; STRUSSMANN, C.; MACHADO, R. B.; AGUIAR, L. M. de S.; FERNANDES, G. W.; OKI, Y.; NOVAIS, S.; FERREIRA, G. B.; BARBOSA, F. R.; OCHOA, A. C.; MANGIONE, A. M.; GATICA, A.; CARRIZO, M. C.; RETTA, L. M.; JOFRÉ, L. E.; CASTILLO, L. L.; NEME, A. M.; RUEDA, C.; TOLEDO, J. J. de; GRELLE, C. E. V.; VALE, M. M.; VIEIRA, M. V.; CERQUEIRA, R.; HIGASHIKAWA, E. M.; MENDONÇA, F. P. de; GUERREIRO, Q. L de M.; BANHOS, A.; HERO, JEAN-MARC; KOBLITZ, R.; COLLEVATTI, R. G.; SILVEIRA, L. F.; VASCONCELOS, H. L.; VIEIRA, C. R.; COLLI, G. R.; CECHIN, S. Z.; SANTOS, T. G. dos; FONTANA, C. S.; JARENKOW, J. A.; MALABARBA, L. R.; RUEDA, M. P. R.; ARAUJO, P. A.; PALOMO, L.; ITURRE, M. C.; BERGALLO, H. G.; MAGNUSSON, W. E. |
Afiliação: |
CLARISSA ROSA, Instituto Nacional de Pesquisas da Amazônia; FABRICIO BACCARO, Universidade Federal do Amazonas; CECILIA CRONEMBERGER, Instituto Chico Mendes de Conservação da Biodiversidade; JULIANA HIPÓLITO, Instituto Nacional de Pesquisas da Amazônia; CLAUDIA FRANCA BARROS, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro; DOMINGOS DE JESUS RODRIGUES, Universidade Federal de Mato Grosso; SELVINO NECKEL-OLIVEIRA, Universidade Federal de Santa Catarina; GERHARD E. OVERBECK, Universidade Federal do Rio Grande do Sul; ELISANDRO RICARDO DRECHSLER-SANTOS, Universidade Federal de Santa Catarina; MARCELO RODRIGUES DOS ANJOS, Universidade Federal do Amazonas; ÁTILLA C. FERREGUETTI, Universidade do Estado do Rio de Janeiro; ALBERTO AKAMA, Museu Paraense Emílio Goeldi; MARLÚCIA BONIFÁCIO MARTINS, Museu Paraense Emílio Goeldi; WALFRIDO MORAES TOMAS, CPAP; SANDRA APARECIDA SANTOS, CPAP; VANDA LÚCIA FERREIRA, Universidade Federal de Mato Grosso do Sul; CATIA NUNES DA CUNHA, Universidade Federal do Mato Grosso; JERRY PENHA, Universidade Federal de Mato Grosso; JOÃO BATISTA DE PINHO, Universidade Federal de Mato Grosso; SUZANA MARIA DE SALIS, CPAP; CAROLINA RODRIGUES DA COSTA DORIA, Universidade Federal de Rondônia; VALÉRIO D. PILLAR, Universidade Federal do Rio Grande do Sul; LUCIANA R. PODGAISKI, Universidade Federal do Rio Grande do Sul; MARCELO MENIN, Universidade Federal do Amazonas; NARCÍSIO COSTA BÍGIO, Universidade Federal de Rondônia; SUSAN ARAGÓN, Universidade Federal do Oeste do Pará; ANGELO GILBERTO MANZATTO, Universidade Federal do Rio Grande do Sul; EDUARDO VÉLEZ-MARTIN, Universidade Federal do Rio Grande do Sul; ANA CAROLINA BORGES LINS E SILVA, Universidade Federal de Rondônia; THIAGO JUNQUEIRA IZZO, Universidade Federal do Mato Grosso; AMANDA FREDERICO MORTATI, Universidade Federal do Oeste do Pará; LEANDRO LACERDA GIACOMIN, Universidade Federal do Oeste do Pará; THAÍS ELIAS ALMEIDA, Universidade Federal do Oeste do Pará; THIAGO ANDRÉ, Universidade Federal do Oeste do Pará; MARIA AUREA PINHEIRO DE ALMEIDA SILVEIRA, Universidade Federal de Rondônia; ANTÔNIO LAFFAYETE PIRES DA SILVEIRA, Universidade Federal de Rondônia; MARILUCE REZENDE MESSIAS, Universidade Federal de Rondônia; MARCIA C. M. MARQUES, Universidade Federal do Paraná; ANDRE ANDRIAN PADIAL, Universidade Federal do Paraná; RENATO MARQUES, Universidade Federal do Paraná; YOUSZEF O. C. BITAR, Universidade Federal do Pará; MARCOS SILVEIRA, Universidade Federal do Acre; ELDER FERREIRA MORATO, Universidade Federal do Acre; RUBIANI DE CÁSSIA PAGOTTO, Universidade Federal de Rondônia; CHRISTINE STRUSSMANN, Universidade Federal de Mato Grosso; RICARDO BOMFIM MACHADO, Universidade de Brasília; LUDMILLA MOURA DE SOUZA AGUIAR, Universidade de Brasília; GERALDO WILSON FERNANDES, Universidade Federal de Minas Gerais; YUMI OKI, Universidade Federal de Minas Gerais; SAMUEL NOVAIS, Universidade Federal de Minas Gerais; GUILHERME BRAGA FERREIRA, University College London; FLÁVIA RODRIGUES BARBOSA, Universidade Federal de Mato Grosso; ANA C. OCHOA, Universidad Nacional de San Luis; ANTONIO M. MANGIONE, Universidad Nacional de San Luis; AILIN GATICA, Universidad Nacional de San Luis; MARÍA CELINA CARRIZO, University College London; LUCÍA MARTINEZ RETTA, Universidad Nacional de San Luis; LAURA E. JOFRÉ, Universidad Nacional de San Luis; LUCIANA L. CASTILLO, Universidad Nacional de San Luis; ANDREA M. NEME, Universidad Nacional de Santiago del Estero; CARLA RUEDA, Universidad Nacional de Santiago del Estero; JOSÉ JULIO DE TOLEDO, Universidade Federal do Amapá; CARLOS EDUARDO VIVEIROS GRELLE, Universidade Federal do Rio de Janeiro; MARIANA M. VALE, Universidade Federal do Rio de Janeiro; MARCUS VINICIUS VIEIRA, Universidade Federal do Rio de Janeiro; RUI CERQUEIRA, Universidade Federal do Rio de Janeiro; EMÍLIO MANABU HIGASHIKAWA, Instituto Nacional de Pesquisas da Amazônia; FERNANDO PEREIRA DE MENDONÇA, Instituto de Educação, Ciência e Tecnologia do Amazonas; QUÊZIA LEANDRO DE MOURA GUERREIRO, Universidade Federal do Oeste do Pará; AUREO BANHOS, Universidade Federal do Espírito Santo; JEAN-MARC HERO, University of the Sunshine Coast; RODRIGO KOBLITZ, Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis; ROSANE GARCIA COLLEVATTI, Universidade Federal de Goiás; LUÍS FÁBIO SILVEIRA, Universidade de São Paulo; HERALDO L. VASCONCELOS, Universidade Federal de Uberlândia; CECÍLIA RODRIGUES VIEIRA, Utah State University; GUARINO RINALDI COLLI, Universidade de Brasília; SONIA ZANINI CECHIN, Universidade Federal de Santa Maria; TIAGO GOMES DOS SANTOS, Universidade Federal do Pampa; CARLA S. FONTANA, Pontifícia Universidade Católica do Rio Grande do Sul; JOÃO A. JARENKOW, Universidade Federal do Rio Grande do Sul; LUIZ R. MALABARBA, Universidade Federal do Rio Grande do Sul; MARTA P. RUEDA, Universidad Nacional de Santiago del Estero; PUBLIO A. ARAUJO, Universidad Nacional de Santiago del Estero; LUCAS PALOMO, Unión de Pequeños Productores del Salado Norte; MARTA C. ITURRE, Universidad Nacional de Santiago del Estero; HELENA GODOY BERGALLO, Universidade do Estado do Rio de Janeiro; WILLIAM E. MAGNUSSON, Instituto Nacional de Pesquisas da Amazônia. |
Título: |
The program for biodiversity research in Brazil: The role of regional networks for biodiversity knowledge, dissemination, and conservation. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, v. 93, n. 2, e20201604, 2021. |
DOI: |
10.1590/0001-3765202120201604 |
Idioma: |
Inglês |
Conteúdo: |
The Program for Biodiversity Research (PPBio) is an innovative program designed to integrate all biodiversity research stakeholders. Operating since 2004, it has installed long-term ecological research sites throughout Brazil and its logic has been applied in some other southern-hemisphere countries. The program supports all aspects of research necessary to understand biodiversity and the processes that affect it. There are presently 161 sampling sites (see some of them at Supplementary Appendix), most of which use a standardized methodology that allows comparisons across biomes and through time. To date, there are about 1200 publications associated with PPBio that cover topics ranging from natural history to genetics and species distributions. Most of the field data and metadata are available through PPBio web sites or DataONE. Metadata is available for researchers that intend to explore the different faces of Brazilian biodiversity spatio-temporal variation, as well as for managers intending to improve conservation strategies. The Program also fostered, directly and indirectly, local technical capacity building, and supported the training of hundreds of undergraduate and graduate students. The main challenge is maintaining the long-term funding necessary to understand biodiversity patterns and processes under pressure from global environmental changes. |
Thesagro: |
Biodiversidade; Conservação; Desenvolvimento Sustentável; Meio Ambiente. |
Thesaurus NAL: |
Environmental control systems; Environmental sustainability; Sustainable development. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/225616/1/Program-for-Biodiversity-Research-2021.pdf
|
Marc: |
LEADER 04870naa a2201261 a 4500 001 2133970 005 2022-01-03 008 2021 bl uuuu u00u1 u #d 024 7 $a10.1590/0001-3765202120201604$2DOI 100 1 $aROSA C. 245 $aThe program for biodiversity research in Brazil$bThe role of regional networks for biodiversity knowledge, dissemination, and conservation.$h[electronic resource] 260 $c2021 520 $aThe Program for Biodiversity Research (PPBio) is an innovative program designed to integrate all biodiversity research stakeholders. Operating since 2004, it has installed long-term ecological research sites throughout Brazil and its logic has been applied in some other southern-hemisphere countries. The program supports all aspects of research necessary to understand biodiversity and the processes that affect it. There are presently 161 sampling sites (see some of them at Supplementary Appendix), most of which use a standardized methodology that allows comparisons across biomes and through time. To date, there are about 1200 publications associated with PPBio that cover topics ranging from natural history to genetics and species distributions. Most of the field data and metadata are available through PPBio web sites or DataONE. Metadata is available for researchers that intend to explore the different faces of Brazilian biodiversity spatio-temporal variation, as well as for managers intending to improve conservation strategies. The Program also fostered, directly and indirectly, local technical capacity building, and supported the training of hundreds of undergraduate and graduate students. The main challenge is maintaining the long-term funding necessary to understand biodiversity patterns and processes under pressure from global environmental changes. 650 $aEnvironmental control systems 650 $aEnvironmental sustainability 650 $aSustainable development 650 $aBiodiversidade 650 $aConservação 650 $aDesenvolvimento Sustentável 650 $aMeio Ambiente 700 1 $aBACCARO, F. 700 1 $aCRONEMBERGER, C. 700 1 $aHIPÓLITO, J. 700 1 $aBARROS, C. F. 700 1 $aRODRIGUES, D. de J. 700 1 $aNECKEL-OLIVEIRA, S. 700 1 $aOVERBECK, G. E. 700 1 $aDRECHSLER-SANTOS, E. R. 700 1 $aANJOS, M. R. dos 700 1 $aFERREGUETTI, A. C. 700 1 $aAKAMA, A. 700 1 $aMARTINS, M. B. 700 1 $aTOMAS, W. M. 700 1 $aSANTOS, S. A. 700 1 $aFERREIRA, V. L. 700 1 $aCUNHA, C. N. da 700 1 $aPENHA, J. 700 1 $aPINHO, J. B. de 700 1 $aSALIS, S. M. 700 1 $aDORIA, C. R. da C. 700 1 $aPILLAR, V. D. 700 1 $aPODGAISKI, L. R. 700 1 $aMENIN, M. 700 1 $aBÍGIO, N, C. 700 1 $aARAGÓN, S. 700 1 $aMANZATTO, A. G. 700 1 $aVÉLEZ-MARTIN, E. 700 1 $aSILVA, A. C. B. L. e 700 1 $aIZZO, T. J. 700 1 $aMORTATI, A. F. 700 1 $aGIACOMIN, L. L. 700 1 $aALMEIDA, T. E. 700 1 $aANDRÉ, T. 700 1 $aSILVEIRA, M. A. P. de A. 700 1 $aSILVEIRA, A. L. P. da 700 1 $aMESSIAS, M. R. 700 1 $aMARQUES, M. C. M. 700 1 $aPADIAL, A. A. 700 1 $aMARQUES, R. 700 1 $aBITAR, Y. O. C. 700 1 $aSILVEIRA, M. 700 1 $aMORATO, E. F. 700 1 $aPAGOTTO, R. de C. 700 1 $aSTRUSSMANN, C. 700 1 $aMACHADO, R. B. 700 1 $aAGUIAR, L. M. de S. 700 1 $aFERNANDES, G. W. 700 1 $aOKI, Y. 700 1 $aNOVAIS, S. 700 1 $aFERREIRA, G. B. 700 1 $aBARBOSA, F. R. 700 1 $aOCHOA, A. C. 700 1 $aMANGIONE, A. M. 700 1 $aGATICA, A. 700 1 $aCARRIZO, M. C. 700 1 $aRETTA, L. M. 700 1 $aJOFRÉ, L. E. 700 1 $aCASTILLO, L. L. 700 1 $aNEME, A. M. 700 1 $aRUEDA, C. 700 1 $aTOLEDO, J. J. de 700 1 $aGRELLE, C. E. V. 700 1 $aVALE, M. M. 700 1 $aVIEIRA, M. V. 700 1 $aCERQUEIRA, R. 700 1 $aHIGASHIKAWA, E. M. 700 1 $aMENDONÇA, F. P. de 700 1 $aGUERREIRO, Q. L de M. 700 1 $aBANHOS, A. 700 1 $aHERO, JEAN-MARC 700 1 $aKOBLITZ, R. 700 1 $aCOLLEVATTI, R. G. 700 1 $aSILVEIRA, L. F. 700 1 $aVASCONCELOS, H. L. 700 1 $aVIEIRA, C. R. 700 1 $aCOLLI, G. R. 700 1 $aCECHIN, S. Z. 700 1 $aSANTOS, T. G. dos 700 1 $aFONTANA, C. S. 700 1 $aJARENKOW, J. A. 700 1 $aMALABARBA, L. R. 700 1 $aRUEDA, M. P. R. 700 1 $aARAUJO, P. A. 700 1 $aPALOMO, L. 700 1 $aITURRE, M. C. 700 1 $aBERGALLO, H. G. 700 1 $aMAGNUSSON, W. E. 773 $tAnais da Academia Brasileira de Ciências$gv. 93, n. 2, e20201604, 2021.
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