| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Soja. |
|
Data corrente: |
28/10/2003 |
|
Data da última atualização: |
24/04/2018 |
|
Autoria: |
JUNG, R.; TOLEDO, J. F. F. de; ARIAS, C. A. A. |
|
Afiliação: |
RENATA JUNG, UEL; JOSÉ FRANCISCO FERRAZ DE TOLEDO, CNPSo; CARLOS ALBERTO ARRABAL ARIAS, CNPSO. |
|
Título: |
Inheritance of soybean resistance to brown spot (Septoria glycines) in early greenhouse assessments. |
|
Ano de publicação: |
2002 |
|
Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, Londrina, v. 2, n. 1, p. 71-76, mar. 2002. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Brown spot disease occurs at the end of the soybean (Glycine max (L.) Merrill) cycle in all cropping regions in Brazil. Under severe conditions, end-of-cycle leaf diseases can reduce crop yield by over 20%. Although the development of resistant cultivars is the most efficient and economical way of disease control, little is known about the genetic mechanism controlling soybean resistance to brown spot. The objective of this study was to investigate the inheritance of resistance to this disease at an early stage (V3/V4) of plant development. The genotypes used were the FT-2 and Davis cultivars, considered resistant and susceptible, respectively, and the F2:3 generation derived from their cross. The experiment was carried out in a greenhouse in a completely randomized design, including 20 plants from each parent and five plants from each 116 F2:3 progenies. The soybean plants were inoculated at the V3/V4 stage and assessed for infection level on the 1st, 2nd and 3 rd leaves at 12, 19 and 26 days after inoculation. The greater susceptibility of Davis compared to FT-2 was confirmed. The F2:3 generation presented reaction to brown spot infection intermediate to the parents. F2:3 based broad sense heritability was predominantly of average magnitude indicating that in spite of the complexity of the trait, with high environmental influence, it is possible to obtain responses to early selection for brown spot resistance under greenhouse conditions when progenies are assessed. |
|
Palavras-Chave: |
Environment interaction; Melhoramento genético. |
|
Thesagro: |
Glycine Max; Melhoramento; Resistência Genética; Soja. |
|
Thesaurus Nal: |
genetic resistance; genotype; plant breeding. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/175936/1/c8128f42-4aa0-573c.pdf
|
|
Marc: |
LEADER 02248naa a2200253 a 4500
001 1465782
005 2018-04-24
008 2002 bl uuuu u00u1 u #d
100 1 $aJUNG, R.
245 $aInheritance of soybean resistance to brown spot (Septoria glycines) in early greenhouse assessments.
260 $c2002
520 $aBrown spot disease occurs at the end of the soybean (Glycine max (L.) Merrill) cycle in all cropping regions in Brazil. Under severe conditions, end-of-cycle leaf diseases can reduce crop yield by over 20%. Although the development of resistant cultivars is the most efficient and economical way of disease control, little is known about the genetic mechanism controlling soybean resistance to brown spot. The objective of this study was to investigate the inheritance of resistance to this disease at an early stage (V3/V4) of plant development. The genotypes used were the FT-2 and Davis cultivars, considered resistant and susceptible, respectively, and the F2:3 generation derived from their cross. The experiment was carried out in a greenhouse in a completely randomized design, including 20 plants from each parent and five plants from each 116 F2:3 progenies. The soybean plants were inoculated at the V3/V4 stage and assessed for infection level on the 1st, 2nd and 3 rd leaves at 12, 19 and 26 days after inoculation. The greater susceptibility of Davis compared to FT-2 was confirmed. The F2:3 generation presented reaction to brown spot infection intermediate to the parents. F2:3 based broad sense heritability was predominantly of average magnitude indicating that in spite of the complexity of the trait, with high environmental influence, it is possible to obtain responses to early selection for brown spot resistance under greenhouse conditions when progenies are assessed.
650 $agenetic resistance
650 $agenotype
650 $aplant breeding
650 $aGlycine Max
650 $aMelhoramento
650 $aResistência Genética
650 $aSoja
653 $aEnvironment interaction
653 $aMelhoramento genético
700 1 $aTOLEDO, J. F. F. de
700 1 $aARIAS, C. A. A.
773 $tCrop Breeding and Applied Biotechnology, Londrina$gv. 2, n. 1, p. 71-76, mar. 2002.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Soja (CNPSO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
|
Data corrente: |
06/12/2023 |
|
Data da última atualização: |
06/12/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 3 |
|
Autoria: |
MENDES, J. DE J.; CARRER, M. J.; VINHOLIS, M. de M. B.; SOUZA FILHO, H. M. DE. |
|
Afiliação: |
JULIANA DE JESUS MENDES, Federal University of São Carlos; MARCELO JOSÉ CARRER, Federal University of São Carlos; MARCELA DE MELLO BRANDAO VINHOLIS, CPPSE; HILDO MEIRELLES DE SOUZA FILHO, Federal University of São Carlos. |
|
Título: |
Adoption and impacts of messaging applications and participation in agricultural information-sharing groups: an empirical analysis with Brazilian farmers. |
|
Ano de publicação: |
2023 |
|
Fonte/Imprenta: |
Journal of Agribusiness in Developing and Emerging Economies, 2023. |
|
Páginas: |
18 p. |
|
DOI: |
https://doi.org/10.1108/JADEE-09-2022-0194 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Purpose This study aimed to identify the determinants of farmers' participation in agricultural information-sharing digital groups and their impacts on farm performance. Design/methodology/approach Primary data of the 2015/2016 crop year collected from 175 cattle farmers were analyzed using descriptive statistics and econometric models. Farmers who had smartphones and participated in social groups/applications, especially those created to exchange agricultural information, were considered adopters of the technology. Findings A Poisson hurdle model showed that farmers' decision to participate in agricultural information-sharing digital groups is determined by schooling, age (negative effect) and use of tools for planning production. The intensity of participation is affected by risk propensity, interaction with specialist advisors, use of tools for planning production and participation in cooperatives. The authors also found empirical evidence that farmers' participation in agricultural information-sharing digital groups positively affects farm income per hectare. Research limitations/implications The results of this study are important for accelerating the diffusion of low-cost digital technologies, which are powerful tools for improving farmers' sharing and access to valuable information in real time and in locations far from urban areas. Originality/value To the best of the authors’ knowledge, this is the first empirical analysis of the adoption and impacts of agricultural information-sharing digital groups/applications by Brazilian cattle farmers. The diffusion of simple digital technologies is important for reducing heterogeneity and increasing the efficiency of cattle production. MenosPurpose This study aimed to identify the determinants of farmers' participation in agricultural information-sharing digital groups and their impacts on farm performance. Design/methodology/approach Primary data of the 2015/2016 crop year collected from 175 cattle farmers were analyzed using descriptive statistics and econometric models. Farmers who had smartphones and participated in social groups/applications, especially those created to exchange agricultural information, were considered adopters of the technology. Findings A Poisson hurdle model showed that farmers' decision to participate in agricultural information-sharing digital groups is determined by schooling, age (negative effect) and use of tools for planning production. The intensity of participation is affected by risk propensity, interaction with specialist advisors, use of tools for planning production and participation in cooperatives. The authors also found empirical evidence that farmers' participation in agricultural information-sharing digital groups positively affects farm income per hectare. Research limitations/implications The results of this study are important for accelerating the diffusion of low-cost digital technologies, which are powerful tools for improving farmers' sharing and access to valuable information in real time and in locations far from urban areas. Originality/value To the best of the authors’ knowledge, this is the first empirical analysis of the adoption and impacts of agricultural... Mostrar Tudo |
|
Palavras-Chave: |
Agriculture 4 0; Digital technologies; Information access; Messaging applications. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 02521naa a2200229 a 4500
001 2159245
005 2023-12-06
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1108/JADEE-09-2022-0194$2DOI
100 1 $aMENDES, J. DE J.
245 $aAdoption and impacts of messaging applications and participation in agricultural information-sharing groups$ban empirical analysis with Brazilian farmers.$h[electronic resource]
260 $c2023
300 $a18 p.
520 $aPurpose This study aimed to identify the determinants of farmers' participation in agricultural information-sharing digital groups and their impacts on farm performance. Design/methodology/approach Primary data of the 2015/2016 crop year collected from 175 cattle farmers were analyzed using descriptive statistics and econometric models. Farmers who had smartphones and participated in social groups/applications, especially those created to exchange agricultural information, were considered adopters of the technology. Findings A Poisson hurdle model showed that farmers' decision to participate in agricultural information-sharing digital groups is determined by schooling, age (negative effect) and use of tools for planning production. The intensity of participation is affected by risk propensity, interaction with specialist advisors, use of tools for planning production and participation in cooperatives. The authors also found empirical evidence that farmers' participation in agricultural information-sharing digital groups positively affects farm income per hectare. Research limitations/implications The results of this study are important for accelerating the diffusion of low-cost digital technologies, which are powerful tools for improving farmers' sharing and access to valuable information in real time and in locations far from urban areas. Originality/value To the best of the authors’ knowledge, this is the first empirical analysis of the adoption and impacts of agricultural information-sharing digital groups/applications by Brazilian cattle farmers. The diffusion of simple digital technologies is important for reducing heterogeneity and increasing the efficiency of cattle production.
653 $aAgriculture 4 0
653 $aDigital technologies
653 $aInformation access
653 $aMessaging applications
700 1 $aCARRER, M. J.
700 1 $aVINHOLIS, M. de M. B.
700 1 $aSOUZA FILHO, H. M. DE
773 $tJournal of Agribusiness in Developing and Emerging Economies, 2023.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
