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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
25/08/2004 |
Data da última atualização: |
25/08/2004 |
Autoria: |
ARAÚJO, A. P.; TEIXEIRA, M. G.; ALMEIDA, D. L. de. |
Título: |
Growth and yield of common bean cultivars at two soil phosphorus levels under biological nitrogen fixation. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasíleira, Brasília, v. 35, n. 4, p. 809-817, 2000. |
Idioma: |
Inglês |
Notas: |
Crescimento e produção de cultivares de feijoeiro em dois níveis de fósforo no solo sob fixação biológica de nitrogênio. |
Conteúdo: |
The genotypic differences on growth and yield of common bean(Phaseolus vulgaris L.) maresponse to P supply were evaluated in a field experiment under biological N2 fixation. Eight cultivars were grown at two levels of applied P(12 and 50Kg há of P, respectively), in randomized block design in factorial arrangement. Vegetetive was sampled at three ontogenetic stages. The effect of genotype were singnificant for most, but not the genotype x phosphorus interaction. The cultivars presented different patterns of biomass production and nutrient accumulation, particulary on root system. At P P accumulation after the beginning of pod filing, and P translocation from roots to shoots was lower. The nodule senescence observed after flowering might have reduced N2 fixation during pod filling. The responses of vegetative growth to the highter P supply did not reflect with the same magnitude on yield, which increased only 6% P2; hence the harvest index was lower at P2 . The cultivars with highest yields also presented lower grain P concentrations. A sub-optimal supply of N could have limited the expression of the yield potencial of cultivars, reducing the genotypic variability of responses to P levels. As diferenças genotípicas no crescimento e produção do feijoeiro em resposta ao suprimento de P foram avaliadas em experimento de campo sob fixação biológica de N2. Foram cultivadas cultivares em duas doses de P(12 e 50 kg há de P, respectivamente P1 e P2), em arranjo fatorial em blocos ao caso, efetuando-se três amostragens de biomassa, em estágios ontogenéticos. Os efeitos de genótipo e fósforo foram significativos na maioria dos caracteres, mas não a interação genótipo fósforo. As cultivares apresentaram diferentes padrões de produção de biomassa e acumulação de nutrientes, particularmente nas raízes. Em P1 a acumulação de p manteve-se após o inicio de formação das vagens, e a translocação de P da raiz para a parte aérea foi menor. A senescência de nódulos após a floração pode Ter reduzido a fixação de N2 durante o enchimento das vagens. As respostas do crescimento vegetativo ao maior suprimento de P não refletiriam com a mesma magnitude na produção de grãos, que aumentou apenas 6% em P1 por isso, o índice de colheita foi menor em P2 . As cultivares com maiores rendimentos apresentaram menores teores de P no grão. Um suprimento subótico de N pode Ter limite a expressão do potencial produtivares, reduzido a variabilidade genotípica das resposta ao P. MenosThe genotypic differences on growth and yield of common bean(Phaseolus vulgaris L.) maresponse to P supply were evaluated in a field experiment under biological N2 fixation. Eight cultivars were grown at two levels of applied P(12 and 50Kg há of P, respectively), in randomized block design in factorial arrangement. Vegetetive was sampled at three ontogenetic stages. The effect of genotype were singnificant for most, but not the genotype x phosphorus interaction. The cultivars presented different patterns of biomass production and nutrient accumulation, particulary on root system. At P P accumulation after the beginning of pod filing, and P translocation from roots to shoots was lower. The nodule senescence observed after flowering might have reduced N2 fixation during pod filling. The responses of vegetative growth to the highter P supply did not reflect with the same magnitude on yield, which increased only 6% P2; hence the harvest index was lower at P2 . The cultivars with highest yields also presented lower grain P concentrations. A sub-optimal supply of N could have limited the expression of the yield potencial of cultivars, reducing the genotypic variability of responses to P levels. As diferenças genotípicas no crescimento e produção do feijoeiro em resposta ao suprimento de P foram avaliadas em experimento de campo sob fixação biológica de N2. Foram cultivadas cultivares em duas doses de P(12 e 50 kg há de P, respectivamente P1 e P2), em arranjo fatorial em bloco... Mostrar Tudo |
Palavras-Chave: |
Biological nitrogen fixation; BNF; FBN; Fixação biológica de nitrogênio; Genotypes; P; Root nodulation. |
Thesagro: |
Feijão; Fósforo; Genótipo; Nodulação; Phaseolus Vulgaris. |
Thesaurus Nal: |
kidney beans; nodulation; phosphorus. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03591naa a2200337 a 4500 001 1626377 005 2004-08-25 008 2000 bl --- 0-- u #d 100 1 $aARAÚJO, A. P. 245 $aGrowth and yield of common bean cultivars at two soil phosphorus levels under biological nitrogen fixation. 260 $c2000 500 $aCrescimento e produção de cultivares de feijoeiro em dois níveis de fósforo no solo sob fixação biológica de nitrogênio. 520 $aThe genotypic differences on growth and yield of common bean(Phaseolus vulgaris L.) maresponse to P supply were evaluated in a field experiment under biological N2 fixation. Eight cultivars were grown at two levels of applied P(12 and 50Kg há of P, respectively), in randomized block design in factorial arrangement. Vegetetive was sampled at three ontogenetic stages. The effect of genotype were singnificant for most, but not the genotype x phosphorus interaction. The cultivars presented different patterns of biomass production and nutrient accumulation, particulary on root system. At P P accumulation after the beginning of pod filing, and P translocation from roots to shoots was lower. The nodule senescence observed after flowering might have reduced N2 fixation during pod filling. The responses of vegetative growth to the highter P supply did not reflect with the same magnitude on yield, which increased only 6% P2; hence the harvest index was lower at P2 . The cultivars with highest yields also presented lower grain P concentrations. A sub-optimal supply of N could have limited the expression of the yield potencial of cultivars, reducing the genotypic variability of responses to P levels. As diferenças genotípicas no crescimento e produção do feijoeiro em resposta ao suprimento de P foram avaliadas em experimento de campo sob fixação biológica de N2. Foram cultivadas cultivares em duas doses de P(12 e 50 kg há de P, respectivamente P1 e P2), em arranjo fatorial em blocos ao caso, efetuando-se três amostragens de biomassa, em estágios ontogenéticos. Os efeitos de genótipo e fósforo foram significativos na maioria dos caracteres, mas não a interação genótipo fósforo. As cultivares apresentaram diferentes padrões de produção de biomassa e acumulação de nutrientes, particularmente nas raízes. Em P1 a acumulação de p manteve-se após o inicio de formação das vagens, e a translocação de P da raiz para a parte aérea foi menor. A senescência de nódulos após a floração pode Ter reduzido a fixação de N2 durante o enchimento das vagens. As respostas do crescimento vegetativo ao maior suprimento de P não refletiriam com a mesma magnitude na produção de grãos, que aumentou apenas 6% em P1 por isso, o índice de colheita foi menor em P2 . As cultivares com maiores rendimentos apresentaram menores teores de P no grão. Um suprimento subótico de N pode Ter limite a expressão do potencial produtivares, reduzido a variabilidade genotípica das resposta ao P. 650 $akidney beans 650 $anodulation 650 $aphosphorus 650 $aFeijão 650 $aFósforo 650 $aGenótipo 650 $aNodulação 650 $aPhaseolus Vulgaris 653 $aBiological nitrogen fixation 653 $aBNF 653 $aFBN 653 $aFixação biológica de nitrogênio 653 $aGenotypes 653 $aP 653 $aRoot nodulation 700 1 $aTEIXEIRA, M. G. 700 1 $aALMEIDA, D. L. de 773 $tPesquisa Agropecuária Brasíleira, Brasília$gv. 35, n. 4, p. 809-817, 2000.
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Embrapa Agrobiologia (CNPAB) |
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Biblioteca(s): |
Embrapa Meio-Norte. |
Data corrente: |
30/11/2015 |
Data da última atualização: |
25/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
SILVA, K. J. D. e; SOUZA, E. A.; FREIRE, C. N. S.; ISHIKAWA, F. H. |
Afiliação: |
KAESEL JACKSON DAMASCENO E SILVA, CPAMN; E.A. Souza, Universidade Federal de Lavras, Laboratório de Resistência de Plantas a Doenças e Genética Molecular, Departamento de Biologia, Lavras, MG.; C.N.S. Freire, Universidade Federal de Lavras, Laboratório de Resistência de Plantas a Doenças e Genética Molecular, Departamento de Biologia, Lavras, MG.; F.H. Ishikawa, Colegiado de Engenharia Agronômica, Universidade Federal do Vale do São Francisco, Petrolina, PE. |
Título: |
Anastomosis groups and molecular variation in Pseudocercospora griseola. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Genetics and Molecular Research, Ribeirão Preto, v. 14, n. 3, p. 7436-7445, July 2015. |
ISSN: |
1676-5680 |
DOI: |
http://dx.doi.org/10.4238/2015.July.3.19 |
Idioma: |
Inglês |
Conteúdo: |
The fungus Pseudocercospora griseola is the causal agent of angular leaf spot, a common bean (Phaseolus vulgaris L.) disease. The successful development of angular leaf spot-resistant cultivars depends on understanding the levels of variability in pathogen populations. P. griseola shows great pathogenic and genetic variation using inoculation on differential bean cultivars and molecular markers. Nevertheless, how this variability develops is not clearly understood. Parasexuality has been presented as a mechanism used by asexual fungi to increase variation. Hyphal fusion is the first step for the parasexual cycle, and it can be considered an additional trait for population studies. The aim of this study was to identify hyphal fusion (anastomosis) among P. grisola isolates and to evaluate the variability of isolates using analyses of anastomosis groups and RAPD markers. Hyphal anastomosis was observed in all isolates. Three isolates showed 85.0% compatibility and were compatible with 17 isolates. This is the first report of the occurrence of anastomosis between P. griseola isolates. Sixteen anastomosis groups were observed and only one group was formed by five isolates (Pg-01, Pg-02, Pg-07, Pg-08, and Pg-12). There was a large number of anastomosis groups and absence of clustering among isolates for hyphal fusion, demonstrating the existence of genetic variability for loci involved in the control of this trait. High genotypic variability by RAPD markers was detected, but there was no relationship between genotype and anastomosis group. More studies are necessary to elucidate further the process of asexual recombination in this phytopathogen. MenosThe fungus Pseudocercospora griseola is the causal agent of angular leaf spot, a common bean (Phaseolus vulgaris L.) disease. The successful development of angular leaf spot-resistant cultivars depends on understanding the levels of variability in pathogen populations. P. griseola shows great pathogenic and genetic variation using inoculation on differential bean cultivars and molecular markers. Nevertheless, how this variability develops is not clearly understood. Parasexuality has been presented as a mechanism used by asexual fungi to increase variation. Hyphal fusion is the first step for the parasexual cycle, and it can be considered an additional trait for population studies. The aim of this study was to identify hyphal fusion (anastomosis) among P. grisola isolates and to evaluate the variability of isolates using analyses of anastomosis groups and RAPD markers. Hyphal anastomosis was observed in all isolates. Three isolates showed 85.0% compatibility and were compatible with 17 isolates. This is the first report of the occurrence of anastomosis between P. griseola isolates. Sixteen anastomosis groups were observed and only one group was formed by five isolates (Pg-01, Pg-02, Pg-07, Pg-08, and Pg-12). There was a large number of anastomosis groups and absence of clustering among isolates for hyphal fusion, demonstrating the existence of genetic variability for loci involved in the control of this trait. High genotypic variability by RAPD markers was detected, but there... Mostrar Tudo |
Palavras-Chave: |
Angular leaf spot; Ciclo parassexual; Common bean; Feijoeiro comum; RAPD markers. |
Thesagro: |
Mancha angular; Marcador molecular. |
Thesaurus NAL: |
Parasexual cycle; Phaeoisariopsis griseola. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/134323/1/ArtigoKaeselGMR.pdf
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Marc: |
LEADER 02533naa a2200289 a 4500 001 2030017 005 2022-05-25 008 2015 bl uuuu u00u1 u #d 022 $a1676-5680 024 7 $ahttp://dx.doi.org/10.4238/2015.July.3.19$2DOI 100 1 $aSILVA, K. J. D. e 245 $aAnastomosis groups and molecular variation in Pseudocercospora griseola. 260 $c2015 520 $aThe fungus Pseudocercospora griseola is the causal agent of angular leaf spot, a common bean (Phaseolus vulgaris L.) disease. The successful development of angular leaf spot-resistant cultivars depends on understanding the levels of variability in pathogen populations. P. griseola shows great pathogenic and genetic variation using inoculation on differential bean cultivars and molecular markers. Nevertheless, how this variability develops is not clearly understood. Parasexuality has been presented as a mechanism used by asexual fungi to increase variation. Hyphal fusion is the first step for the parasexual cycle, and it can be considered an additional trait for population studies. The aim of this study was to identify hyphal fusion (anastomosis) among P. grisola isolates and to evaluate the variability of isolates using analyses of anastomosis groups and RAPD markers. Hyphal anastomosis was observed in all isolates. Three isolates showed 85.0% compatibility and were compatible with 17 isolates. This is the first report of the occurrence of anastomosis between P. griseola isolates. Sixteen anastomosis groups were observed and only one group was formed by five isolates (Pg-01, Pg-02, Pg-07, Pg-08, and Pg-12). There was a large number of anastomosis groups and absence of clustering among isolates for hyphal fusion, demonstrating the existence of genetic variability for loci involved in the control of this trait. High genotypic variability by RAPD markers was detected, but there was no relationship between genotype and anastomosis group. More studies are necessary to elucidate further the process of asexual recombination in this phytopathogen. 650 $aParasexual cycle 650 $aPhaeoisariopsis griseola 650 $aMancha angular 650 $aMarcador molecular 653 $aAngular leaf spot 653 $aCiclo parassexual 653 $aCommon bean 653 $aFeijoeiro comum 653 $aRAPD markers 700 1 $aSOUZA, E. A. 700 1 $aFREIRE, C. N. S. 700 1 $aISHIKAWA, F. H. 773 $tGenetics and Molecular Research, Ribeirão Preto$gv. 14, n. 3, p. 7436-7445, July 2015.
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