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Registro Completo |
Biblioteca(s): |
Embrapa Algodão. |
Data corrente: |
21/03/2016 |
Data da última atualização: |
21/03/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MENEZES, I. P. P. DE; HOFFMANN, L. V.; BARROSO, P. A. V. |
Afiliação: |
IVANDILSON PESSOA PINTO DE MENEZES, INSTITUO FEDERAL GOIANO; LUCIA VIEIRA HOFFMANN, CNPA; PAULO AUGUSTO VIANNA BARROSO, CNPA. |
Título: |
Genetic charecterization of cotton landraces found in the Paraíba and Rio Grande do Norte states. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, v. 15, p. 26-32, 2015. |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to estimate genetic diversity of cotton mocó planted in Paraíba and Rio Grande do Norte using microsatellite markers, since mocó landraces are a valuable source of genetic diversity. A set of 38 accessions - 21 plants from Rio Grande do Norte and 17 from Paraiba - was analyzed using 24 pairs of cotton microsatellite primers, which amplified 20 polymorphic loci. The average inbreeding was 0.432, and was slightly higher in individuals from Paraíba than from Rio Grande do Norte. Genetic diversity (Nei´s unbiased estimator) between individuals from each state?s populations had similar values (HT = 0.327 and 0.302 in Paraíba and Rio Grande do Norte, respectively), indicating that comparable variability has been maintained. Moreover, the proportion of diversity between populations was extremely low (DST = 0.007), but expressive between mesoregions (DST = 0.069). These data led us to conclude that the genetic similarities between populations are high. |
Palavras-Chave: |
Genetic structure; Microsatellite markers. |
Thesagro: |
Gossypium hirsutum. |
Thesaurus Nal: |
cotton. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/141444/1/Genetic-characterization-of-cotton-landraces-....pdf
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Marc: |
LEADER 01608naa a2200193 a 4500 001 2041495 005 2016-03-21 008 2015 bl uuuu u00u1 u #d 100 1 $aMENEZES, I. P. P. DE 245 $aGenetic charecterization of cotton landraces found in the Paraíba and Rio Grande do Norte states.$h[electronic resource] 260 $c2015 520 $aThe objective of this study was to estimate genetic diversity of cotton mocó planted in Paraíba and Rio Grande do Norte using microsatellite markers, since mocó landraces are a valuable source of genetic diversity. A set of 38 accessions - 21 plants from Rio Grande do Norte and 17 from Paraiba - was analyzed using 24 pairs of cotton microsatellite primers, which amplified 20 polymorphic loci. The average inbreeding was 0.432, and was slightly higher in individuals from Paraíba than from Rio Grande do Norte. Genetic diversity (Nei´s unbiased estimator) between individuals from each state?s populations had similar values (HT = 0.327 and 0.302 in Paraíba and Rio Grande do Norte, respectively), indicating that comparable variability has been maintained. Moreover, the proportion of diversity between populations was extremely low (DST = 0.007), but expressive between mesoregions (DST = 0.069). These data led us to conclude that the genetic similarities between populations are high. 650 $acotton 650 $aGossypium hirsutum 653 $aGenetic structure 653 $aMicrosatellite markers 700 1 $aHOFFMANN, L. V. 700 1 $aBARROSO, P. A. V. 773 $tCrop Breeding and Applied Biotechnology$gv. 15, p. 26-32, 2015.
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
26/10/2023 |
Data da última atualização: |
26/10/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
OLIVEIRA, A. D. de; RIBEIRO, F. P.; FIGUEIREDO, C. C. de; MULLER, A. G.; MALAQUIAS, J. V.; SANTOS, I. L. dos; SA, M. A. C. de; SOARES, J. P. G.; SANTOS, M. V. A. dos; CARVALHO, A. M. de. |
Afiliação: |
ALEXSANDRA DUARTE DE OLIVEIRA, CPAC; FABIANA PIONTEKOWSKI RIBEIRO; CÍCERO CÉLIO DE FIGUEIREDO, Universidade de Brasília; ARTUR GUSTAVO MULLER, CPAC; JUACI VITORIA MALAQUIAS, CPAC; ISIS LIMA DOS SANTOS, Universidade de Brasília; MARCOS AURELIO CAROLINO DE SA, CPAC; JOAO PAULO GUIMARAES SOARES, CPAC; MARCOS VINÍCIUS ARAÚJO DOS SANTOS; ARMINDA MOREIRA DE CARVALHO, CPAC. |
Título: |
Effects of soil management, rotation and sequence of crops on soil nitrous oxide emissions in the Cerrado: a multi-factor assessment. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Journal of Environmental Management, v. 348, 119295, 2023. |
DOI: |
https://doi.org/10.1016/j.jenvman.2023.119295 |
Idioma: |
Português |
Conteúdo: |
The emission of nitrous oxide (N2O), one of the main greenhouse gases, which contributes significantly to global warming, is a major challenge in modern agriculture. The effects of land use systems on N2O emissions are the result of multiple variables, whose interactions need to be better understood. In this sense, this study analyzed the possible effects of different soil managements, crop rotations and sequences, as well as edaphoclimatic factors causing N2O emissions from soils in the Cerrado biome (scrubland). The following four land-use systems were evaluated: 1) No-tillage cultivation with biennial crop rotations and sequences: legume-grass and alternating grass-legume crops in the second season - NT-SS/MP; 2) No-tillage with biennial rotations and sequences: grasslegume and alternating second crop of legume-grass - NT-MP/SS; 3) Conventional planting with disc harrow and biennial legume-grass rotation-CT-S/M; and 4) Native Cerrado (CE), no agricultural land use. The legume and grass species, planted in the two no-tillage treatments were soybean, followed by sorghum BRS3.32 (Sorghum bicolor (L.) Moench) (SS), and maize, followed by pigeon pea (Cajanus cajan) (MP). Nitrous oxide emissions were evaluated for 25 months (October 2013 to October 2015), and the results were grouped in annual, total, growing and non-growing seasons, as well as yield-scaled N2O emissions. The mean N2O fluxes were 24.14, 15.71, 32.49 and 1.87 ?g m? 2 h? 1 in the NT-SS/MP, NT-MP/SS, CT-S/M and Cerrado areas respectively. Cumulative N2O fluxes over the total evaluation period from the systems NT-SS/MP, NT-MP/SS, CT-S/M and CE, respectively, were 3.47, 2.29, 4.87 and 0.26 kg ha? 1. A correlation between N2O fluxes and the environmental variables was observed, with the exception of water-filled pore space (WFPS), but N2O peaks were associated with WFPS values of >65%. In the 2014?2015 growing season, yield-scaled N2O emissions from NT-MP/SS were lower than from CT-S/M. A multi-factor approach indicated that conventional management with main season soybean or maize and no alternating crop sequence intensifies soil N2O emissions in the Cerrado. MenosThe emission of nitrous oxide (N2O), one of the main greenhouse gases, which contributes significantly to global warming, is a major challenge in modern agriculture. The effects of land use systems on N2O emissions are the result of multiple variables, whose interactions need to be better understood. In this sense, this study analyzed the possible effects of different soil managements, crop rotations and sequences, as well as edaphoclimatic factors causing N2O emissions from soils in the Cerrado biome (scrubland). The following four land-use systems were evaluated: 1) No-tillage cultivation with biennial crop rotations and sequences: legume-grass and alternating grass-legume crops in the second season - NT-SS/MP; 2) No-tillage with biennial rotations and sequences: grasslegume and alternating second crop of legume-grass - NT-MP/SS; 3) Conventional planting with disc harrow and biennial legume-grass rotation-CT-S/M; and 4) Native Cerrado (CE), no agricultural land use. The legume and grass species, planted in the two no-tillage treatments were soybean, followed by sorghum BRS3.32 (Sorghum bicolor (L.) Moench) (SS), and maize, followed by pigeon pea (Cajanus cajan) (MP). Nitrous oxide emissions were evaluated for 25 months (October 2013 to October 2015), and the results were grouped in annual, total, growing and non-growing seasons, as well as yield-scaled N2O emissions. The mean N2O fluxes were 24.14, 15.71, 32.49 and 1.87 ?g m? 2 h? 1 in the NT-SS/MP, NT-MP/SS, CT-S/M and Ce... Mostrar Tudo |
Palavras-Chave: |
GHGs emissions; Maize; N fertilization; Tillage system. |
Thesaurus NAL: |
Soybeans. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03110naa a2200301 a 4500 001 2157543 005 2023-10-26 008 2023 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.jenvman.2023.119295$2DOI 100 1 $aOLIVEIRA, A. D. de 245 $aEffects of soil management, rotation and sequence of crops on soil nitrous oxide emissions in the Cerrado$ba multi-factor assessment.$h[electronic resource] 260 $c2023 520 $aThe emission of nitrous oxide (N2O), one of the main greenhouse gases, which contributes significantly to global warming, is a major challenge in modern agriculture. The effects of land use systems on N2O emissions are the result of multiple variables, whose interactions need to be better understood. In this sense, this study analyzed the possible effects of different soil managements, crop rotations and sequences, as well as edaphoclimatic factors causing N2O emissions from soils in the Cerrado biome (scrubland). The following four land-use systems were evaluated: 1) No-tillage cultivation with biennial crop rotations and sequences: legume-grass and alternating grass-legume crops in the second season - NT-SS/MP; 2) No-tillage with biennial rotations and sequences: grasslegume and alternating second crop of legume-grass - NT-MP/SS; 3) Conventional planting with disc harrow and biennial legume-grass rotation-CT-S/M; and 4) Native Cerrado (CE), no agricultural land use. The legume and grass species, planted in the two no-tillage treatments were soybean, followed by sorghum BRS3.32 (Sorghum bicolor (L.) Moench) (SS), and maize, followed by pigeon pea (Cajanus cajan) (MP). Nitrous oxide emissions were evaluated for 25 months (October 2013 to October 2015), and the results were grouped in annual, total, growing and non-growing seasons, as well as yield-scaled N2O emissions. The mean N2O fluxes were 24.14, 15.71, 32.49 and 1.87 ?g m? 2 h? 1 in the NT-SS/MP, NT-MP/SS, CT-S/M and Cerrado areas respectively. Cumulative N2O fluxes over the total evaluation period from the systems NT-SS/MP, NT-MP/SS, CT-S/M and CE, respectively, were 3.47, 2.29, 4.87 and 0.26 kg ha? 1. A correlation between N2O fluxes and the environmental variables was observed, with the exception of water-filled pore space (WFPS), but N2O peaks were associated with WFPS values of >65%. In the 2014?2015 growing season, yield-scaled N2O emissions from NT-MP/SS were lower than from CT-S/M. A multi-factor approach indicated that conventional management with main season soybean or maize and no alternating crop sequence intensifies soil N2O emissions in the Cerrado. 650 $aSoybeans 653 $aGHGs emissions 653 $aMaize 653 $aN fertilization 653 $aTillage system 700 1 $aRIBEIRO, F. P. 700 1 $aFIGUEIREDO, C. C. de 700 1 $aMULLER, A. G. 700 1 $aMALAQUIAS, J. V. 700 1 $aSANTOS, I. L. dos 700 1 $aSA, M. A. C. de 700 1 $aSOARES, J. P. G. 700 1 $aSANTOS, M. V. A. dos 700 1 $aCARVALHO, A. M. de 773 $tJournal of Environmental Management$gv. 348, 119295, 2023.
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