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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Arroz e Feijão. |
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Data corrente: |
07/12/2004 |
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Data da última atualização: |
07/05/2007 |
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Autoria: |
REIS JÚNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M. |
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Título: |
Associação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2003. |
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Páginas: |
52 p. |
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Série: |
(Embrapa Cerrados. Documentos, 81). |
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Idioma: |
Português |
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Conteúdo: |
A situação das pastagens no Brasil. Pastagens de braquiária. Impacto ambiental das pastagens de Brachiaria. Degradação de pastagens. Utilização de leguminosas em pastos de Brachiaria. Fixação biológica de nitrogênio por bactérias associadas a Brachiaria spp. O gênero Azospirillum. Locais de implantação dos experimentos. Sítio de Goiás. Sítio da Bahia. Isolamento, caracterização e quantificação de bactérias diazotróficas. Análise estatística. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. Isolamento e caracterização. Coletas exploratórias (pré-experimentais). Quantificação de Azospirillum spp. associados as raízes de Brachiaria (NMP). Sítio experimental de Goiás. Sítio experimental da Bahia. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospiri!lum genus. The associations between these microrganisms and the plants are genera!ly conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective effect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospiri!lum genus associated with the roots of these plants. Different pastures (B. humidicola, B. decumbens and B. brizan!ha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The co!lects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and quantification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasilense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 1 Q3 -107 ce!ls. 9 of roots-l. In the samples of the Cerrado ecosystem, the co!lect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospiri!lum spp. associated to its roots. Index terms: Azospiri!lum amazonense, biological nitrogen fixation, pastures degradation. MenosA situação das pastagens no Brasil. Pastagens de braquiária. Impacto ambiental das pastagens de Brachiaria. Degradação de pastagens. Utilização de leguminosas em pastos de Brachiaria. Fixação biológica de nitrogênio por bactérias associadas a Brachiaria spp. O gênero Azospirillum. Locais de implantação dos experimentos. Sítio de Goiás. Sítio da Bahia. Isolamento, caracterização e quantificação de bactérias diazotróficas. Análise estatística. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. Isolamento e caracterização. Coletas exploratórias (pré-experimentais). Quantificação de Azospirillum spp. associados as raízes de Brachiaria (NMP). Sítio experimental de Goiás. Sítio experimental da Bahia. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospiri!lum genus. The associations between these microrganisms and the plants are genera!ly conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria ex... Mostrar Tudo |
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Palavras-Chave: |
Bactéira diazotrófica; Biological nitrogen fixation; BNF; Braquiária; Degredação; Diazotrophy bacteria; FBN; Fixação biológica de nitrogênio; Growth. |
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Thesagro: |
Bactéria; Brachiaria; Crescimento; Fixação de Nitrogênio; Microbiologia do Solo; Pastagem. |
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Thesaurus Nal: |
Azospirillum amazonense; degradation; microbiology; nitrogen fixation; pastures; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 04272nam a2200421 a 4500
001 1214969
005 2007-05-07
008 2003 bl uuuu u0uu1 u #d
100 1 $aREIS JÚNIOR, F. B. dos
245 $aAssociação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria.
260 $aPlanaltina, DF: Embrapa Cerrados$c2003
300 $a52 p.
490 $a(Embrapa Cerrados. Documentos, 81).
520 $aA situação das pastagens no Brasil. Pastagens de braquiária. Impacto ambiental das pastagens de Brachiaria. Degradação de pastagens. Utilização de leguminosas em pastos de Brachiaria. Fixação biológica de nitrogênio por bactérias associadas a Brachiaria spp. O gênero Azospirillum. Locais de implantação dos experimentos. Sítio de Goiás. Sítio da Bahia. Isolamento, caracterização e quantificação de bactérias diazotróficas. Análise estatística. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. Isolamento e caracterização. Coletas exploratórias (pré-experimentais). Quantificação de Azospirillum spp. associados as raízes de Brachiaria (NMP). Sítio experimental de Goiás. Sítio experimental da Bahia. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospiri!lum genus. The associations between these microrganisms and the plants are genera!ly conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective effect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospiri!lum genus associated with the roots of these plants. Different pastures (B. humidicola, B. decumbens and B. brizan!ha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The co!lects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and quantification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasilense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 1 Q3 -107 ce!ls. 9 of roots-l. In the samples of the Cerrado ecosystem, the co!lect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospiri!lum spp. associated to its roots. Index terms: Azospiri!lum amazonense, biological nitrogen fixation, pastures degradation.
650 $aAzospirillum amazonense
650 $adegradation
650 $amicrobiology
650 $anitrogen fixation
650 $apastures
650 $asoil
650 $aBactéria
650 $aBrachiaria
650 $aCrescimento
650 $aFixação de Nitrogênio
650 $aMicrobiologia do Solo
650 $aPastagem
653 $aBactéira diazotrófica
653 $aBiological nitrogen fixation
653 $aBNF
653 $aBraquiária
653 $aDegredação
653 $aDiazotrophy bacteria
653 $aFBN
653 $aFixação biológica de nitrogênio
653 $aGrowth
700 1 $aTEIXEIRA, K. R. dos S.
700 1 $aURQUIAGA, S.
700 1 $aREIS, V. M.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
17/05/2017 |
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Data da última atualização: |
31/03/2023 |
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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: |
RESENDE, R. T.; RESENDE, M. D. V. de; SILVA, F. F. S.; AZEVEDO, C. F. A.; TAKAHASHI, E. K. T.; SILVA JUNIOR, O. B. da; GRATTAPAGLIA, D. |
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Afiliação: |
RAFAEL TASSINARI RESENDE, UNIVERSIDADE FEDERAL DE VIÇOSA; MARCOS DEON VILELA DE RESENDE, CNPF; FABYANO FONSECA SILVA, UNIVERSIDADE FEDERAL DE VIÇOSA; CAMILA FERREIRA AZEVEDO, UNIVERSIDADE FEDERAL DE VIÇOSA; ELIZABETE KEIKO TAKAHASHI, CENIBRA CELULOSE NIPO BRASILEIRA S.A; ORZENIL BONFIM DA SILVA JUNIOR, Cenargen; DARIO GRATTAPAGLIA, Cenargen. |
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Título: |
Regional heritability mapping and genome-wide association identify loci for complex growth, wood and disease resistance traits in Eucalyptus. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
New Phytologist, v. 213, p. 1287-1300, 2017. |
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DOI: |
10.1111/nph.14266 |
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Idioma: |
Inglês |
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Conteúdo: |
Although genome-wide association studies (GWAS) have provided valuable insights into the decoding of the relationships between sequence variation and complex phenotypes, they have explained little heritability. Regional heritability mapping (RHM) provides heritability estimates for genomic segments containing both common and rare allelic effects that individually contribute too little variance to be detected by GWAS. We carried out GWAS and RHM for seven growth, wood and disease resistance traits in a breeding population of 768 Eucalyptus hybrid trees using EuCHIP60K. Total genomic heritabilities accounted for large proportions (64?89%) of pedigree-based trait heritabilities, providing additional evidence that complex traits in eucalypts are controlled by many sequence variants across the frequency spectrum, each with small contributions to the phenotypic variance. RHM detected 26 quantitative trait loci (QTLs) encompassing 2191 single nucleotide polymorphisms (SNPs), whereas GWAS detected 13 single SNP?trait associations. RHM and GWAS QTLs individually explained 5?15% and 4?6% of the genomic heritability, respectively. RHM was superior to GWAS in capturing larger proportions of genomic heritability. Equated to previously mapped QTLs, our results highlighted genomic regions for further examination towards gene discovery. RHM-QTLs bearing a combination of common and rare variants could be useful enhancements to incorporate prior knowledge of the underlying genetic architecture in genomic prediction mode MenosAlthough genome-wide association studies (GWAS) have provided valuable insights into the decoding of the relationships between sequence variation and complex phenotypes, they have explained little heritability. Regional heritability mapping (RHM) provides heritability estimates for genomic segments containing both common and rare allelic effects that individually contribute too little variance to be detected by GWAS. We carried out GWAS and RHM for seven growth, wood and disease resistance traits in a breeding population of 768 Eucalyptus hybrid trees using EuCHIP60K. Total genomic heritabilities accounted for large proportions (64?89%) of pedigree-based trait heritabilities, providing additional evidence that complex traits in eucalypts are controlled by many sequence variants across the frequency spectrum, each with small contributions to the phenotypic variance. RHM detected 26 quantitative trait loci (QTLs) encompassing 2191 single nucleotide polymorphisms (SNPs), whereas GWAS detected 13 single SNP?trait associations. RHM and GWAS QTLs individually explained 5?15% and 4?6% of the genomic heritability, respectively. RHM was superior to GWAS in capturing larger proportions of genomic heritability. Equated to previously mapped QTLs, our results highlighted genomic regions for further examination towards gene discovery. RHM-QTLs bearing a combination of common and rare variants could be useful enhancements to incorporate prior knowledge of the underlying genetic architectur... Mostrar Tudo |
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Thesaurus NAL: |
Eucalyptus. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/159955/1/Resende-et-al-2017-New-Phytologist.pdf
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Marc: |
LEADER 02237naa a2200217 a 4500
001 2074137
005 2023-03-31
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1111/nph.14266$2DOI
100 1 $aRESENDE, R. T.
245 $aRegional heritability mapping and genome-wide association identify loci for complex growth, wood and disease resistance traits in Eucalyptus.$h[electronic resource]
260 $c2017
520 $aAlthough genome-wide association studies (GWAS) have provided valuable insights into the decoding of the relationships between sequence variation and complex phenotypes, they have explained little heritability. Regional heritability mapping (RHM) provides heritability estimates for genomic segments containing both common and rare allelic effects that individually contribute too little variance to be detected by GWAS. We carried out GWAS and RHM for seven growth, wood and disease resistance traits in a breeding population of 768 Eucalyptus hybrid trees using EuCHIP60K. Total genomic heritabilities accounted for large proportions (64?89%) of pedigree-based trait heritabilities, providing additional evidence that complex traits in eucalypts are controlled by many sequence variants across the frequency spectrum, each with small contributions to the phenotypic variance. RHM detected 26 quantitative trait loci (QTLs) encompassing 2191 single nucleotide polymorphisms (SNPs), whereas GWAS detected 13 single SNP?trait associations. RHM and GWAS QTLs individually explained 5?15% and 4?6% of the genomic heritability, respectively. RHM was superior to GWAS in capturing larger proportions of genomic heritability. Equated to previously mapped QTLs, our results highlighted genomic regions for further examination towards gene discovery. RHM-QTLs bearing a combination of common and rare variants could be useful enhancements to incorporate prior knowledge of the underlying genetic architecture in genomic prediction mode
650 $aEucalyptus
700 1 $aRESENDE, M. D. V. de
700 1 $aSILVA, F. F. S.
700 1 $aAZEVEDO, C. F. A.
700 1 $aTAKAHASHI, E. K. T.
700 1 $aSILVA JUNIOR, O. B. da
700 1 $aGRATTAPAGLIA, D.
773 $tNew Phytologist$gv. 213, p. 1287-1300, 2017.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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