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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
08/09/2016 |
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Data da última atualização: |
27/04/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
D'ÁVILA, L. S.; LEHNER, M. S.; FILIPPI, M. C. C.; SCHEUERMANN, K. K.; DEL PONTE, E. M. |
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Afiliação: |
LEILANE S. D'AVILA, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL, Porto Alegre-RS; MILLER S. LEHNER, UNIVERSIDADE FEDERAL DE VIÇOSA; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; KLAUS K. SCHEUERMANN, EPAGRI; EMERSON M. DEL PONTE, UNIVERSIDADE FEDERAL DE VIÇOSA. |
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Título: |
Genetic structure and mating type analysis of the Pyricularia oryzae population causing widespread epidemics in southern Brazil. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Tropical Plant Pathology, Brasília, DF, v. 41, n. 6, p. 297-305, Oct. 2016. |
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DOI: |
10.1007/s40858-016-0101-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Blast is a major disease of rice in Brazil, the largest rice-producing country outside Asia. This study aimed to assess the genetic structure and mating-type frequency in a contemporary Pyricularia oryzae population, which caused widespread epidemics during the 2012/13 season in the Brazilian lowland subtropical region. Symptomatic leaves and panicles were sampled at flooded rice fields in the states of Rio Grande do Sul (RS, 34 fields) and Santa Catarina (SC, 21 fields). The polymorphism at ten simple sequence repeats (SSR or microsatellite) loci and the presence of MAT1-1 or MAT1-2 idiomorphs were assessed in a population comprised of 187 isolates. Only the MAT1-2 idiomorph was found and 162 genotypes were identified by the SSR analysis. A discriminant analysis of principal components (DAPC) of SSR data resolved four genetic groups, which were strongly associated with the cultivar of origin of the isolates. There was high level of genotypic diversity and moderate level of gene diversity regardless whether isolates were grouped in subpopulations based on geographic region, cultivar host or cultivar within region. While regional subpopulations were weakly differentiated, high genetic differentiation was found among subpopulations comprised of isolates from different cultivars. The data suggest that the rice blast pathogen population in southern Brazil is comprised of clonal lineages that are adapting to specific cultivar hosts. Farmers should avoid the use of susceptible cultivars over large areas and breeders should focus at enlarging the genetic basis of new cultivars. MenosBlast is a major disease of rice in Brazil, the largest rice-producing country outside Asia. This study aimed to assess the genetic structure and mating-type frequency in a contemporary Pyricularia oryzae population, which caused widespread epidemics during the 2012/13 season in the Brazilian lowland subtropical region. Symptomatic leaves and panicles were sampled at flooded rice fields in the states of Rio Grande do Sul (RS, 34 fields) and Santa Catarina (SC, 21 fields). The polymorphism at ten simple sequence repeats (SSR or microsatellite) loci and the presence of MAT1-1 or MAT1-2 idiomorphs were assessed in a population comprised of 187 isolates. Only the MAT1-2 idiomorph was found and 162 genotypes were identified by the SSR analysis. A discriminant analysis of principal components (DAPC) of SSR data resolved four genetic groups, which were strongly associated with the cultivar of origin of the isolates. There was high level of genotypic diversity and moderate level of gene diversity regardless whether isolates were grouped in subpopulations based on geographic region, cultivar host or cultivar within region. While regional subpopulations were weakly differentiated, high genetic differentiation was found among subpopulations comprised of isolates from different cultivars. The data suggest that the rice blast pathogen population in southern Brazil is comprised of clonal lineages that are adapting to specific cultivar hosts. Farmers should avoid the use of susceptible cul... Mostrar Tudo |
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Palavras-Chave: |
Microsatelite. |
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Thesagro: |
Arroz; Brusone; Doença de planta; Fungo; Oryza sativa; Pyricularia oryzae. |
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Thesaurus Nal: |
Blast disease; Magnaporthe oryzae; Microsatellite repeats; Population structure. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02566naa a2200313 a 4500
001 2052551
005 2020-04-27
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s40858-016-0101-9$2DOI
100 1 $aD'ÁVILA, L. S.
245 $aGenetic structure and mating type analysis of the Pyricularia oryzae population causing widespread epidemics in southern Brazil.$h[electronic resource]
260 $c2016
520 $aBlast is a major disease of rice in Brazil, the largest rice-producing country outside Asia. This study aimed to assess the genetic structure and mating-type frequency in a contemporary Pyricularia oryzae population, which caused widespread epidemics during the 2012/13 season in the Brazilian lowland subtropical region. Symptomatic leaves and panicles were sampled at flooded rice fields in the states of Rio Grande do Sul (RS, 34 fields) and Santa Catarina (SC, 21 fields). The polymorphism at ten simple sequence repeats (SSR or microsatellite) loci and the presence of MAT1-1 or MAT1-2 idiomorphs were assessed in a population comprised of 187 isolates. Only the MAT1-2 idiomorph was found and 162 genotypes were identified by the SSR analysis. A discriminant analysis of principal components (DAPC) of SSR data resolved four genetic groups, which were strongly associated with the cultivar of origin of the isolates. There was high level of genotypic diversity and moderate level of gene diversity regardless whether isolates were grouped in subpopulations based on geographic region, cultivar host or cultivar within region. While regional subpopulations were weakly differentiated, high genetic differentiation was found among subpopulations comprised of isolates from different cultivars. The data suggest that the rice blast pathogen population in southern Brazil is comprised of clonal lineages that are adapting to specific cultivar hosts. Farmers should avoid the use of susceptible cultivars over large areas and breeders should focus at enlarging the genetic basis of new cultivars.
650 $aBlast disease
650 $aMagnaporthe oryzae
650 $aMicrosatellite repeats
650 $aPopulation structure
650 $aArroz
650 $aBrusone
650 $aDoença de planta
650 $aFungo
650 $aOryza sativa
650 $aPyricularia oryzae
653 $aMicrosatelite
700 1 $aLEHNER, M. S.
700 1 $aFILIPPI, M. C. C.
700 1 $aSCHEUERMANN, K. K.
700 1 $aDEL PONTE, E. M.
773 $tTropical Plant Pathology, Brasília, DF$gv. 41, n. 6, p. 297-305, Oct. 2016.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
15/06/2021 |
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Data da última atualização: |
10/03/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
YAZDANPANAH, M.; MOGHADAM, M. T.; ZOBEIDI, T.; TURETTA, A. P. D.; EUFEMIA, L.; SIEBER, S. |
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Afiliação: |
MASOUD YAZDANPANAH, UNIVERSITY OF KHUZESTAN; MARYAM TAJERI MOGHADAM, UNIVERSITY OF TABRIZ; TAHEREH ZOBEIDI, UNIVERSITY OF ZANJAN; ANA PAULA DIAS TURETTA, CNPS; LUCA EUFEMIA, LEIBNIZ CENTRE FOR AGRICULTURAL LANDSCAPE RESEARCH/HUMBOLDT UNIVERSITY OF BERLIN; STEFAN SIEBER, HUMBOLDT-UNIVERSITÄT ZU BERLIN/LEIBNIZ CENTRE FOR AGRICULTURAL LANDSCAPE RESEARCH. |
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Título: |
What factors contribute to conversion to organic farming? Consideration of the Health Belief Model in relation to the uptake of organic farming by Iranian farmers. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of Environmental Planning and Management, v. 65, n. 5, p. 907-929, 2022. |
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DOI: |
https://doi.org/10.1080/09640568.2021.1917348 |
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Idioma: |
Inglês |
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Conteúdo: |
Organic Farming (OF) is a response to challenges caused by conventional or intensive agriculture. Successful organic production depends on farmers choosing to grow organic products. The main goal of this study is to analyze and identify factors affecting farmers' willingness to implement OF in southwest Iran. For this, we borrowed the health belief model (HBM) from the health psychology domain. The study, a questionnaire-based cross-sectional survey in Behbahan County, Khuzestan province, in southwest Iran, comprises 320 farmers who were selected through a multistage random sampling technique. The structural equations modeling reveals that four variables - cue to action, perceived barriers, general beliefs, and perceived benefits - account for 54% of the variance in farmers' willingness toward OF. Furthermore, cue to action is the most important factor determining farmer willingness towards implementing OF. The results reveal that HBM has appropriate explanatory power and is an effective tool for investigating farmer willingness toward OF. It is suggested that government agencies use socio-psychological frameworks to develop organic agriculture. Additionally, as government agencies develop policies that increase OF, the consideration of how farmers perceive the benefits and barriers of implementing OF is critical, along with understanding their general beliefs and concerns about the use of chemical fertilizers and pesticides in conventional agriculture. Offering extension services is also key. MenosOrganic Farming (OF) is a response to challenges caused by conventional or intensive agriculture. Successful organic production depends on farmers choosing to grow organic products. The main goal of this study is to analyze and identify factors affecting farmers' willingness to implement OF in southwest Iran. For this, we borrowed the health belief model (HBM) from the health psychology domain. The study, a questionnaire-based cross-sectional survey in Behbahan County, Khuzestan province, in southwest Iran, comprises 320 farmers who were selected through a multistage random sampling technique. The structural equations modeling reveals that four variables - cue to action, perceived barriers, general beliefs, and perceived benefits - account for 54% of the variance in farmers' willingness toward OF. Furthermore, cue to action is the most important factor determining farmer willingness towards implementing OF. The results reveal that HBM has appropriate explanatory power and is an effective tool for investigating farmer willingness toward OF. It is suggested that government agencies use socio-psychological frameworks to develop organic agriculture. Additionally, as government agencies develop policies that increase OF, the consideration of how farmers perceive the benefits and barriers of implementing OF is critical, along with understanding their general beliefs and concerns about the use of chemical fertilizers and pesticides in conventional agriculture. Offering extension se... Mostrar Tudo |
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Palavras-Chave: |
Green production; Preventive behavior. |
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Thesagro: |
Agricultura Sustentável. |
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Thesaurus NAL: |
Risk perception; Sustainable agriculture. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02408naa a2200253 a 4500
001 2132318
005 2022-03-10
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1080/09640568.2021.1917348$2DOI
100 1 $aYAZDANPANAH, M.
245 $aWhat factors contribute to conversion to organic farming? Consideration of the Health Belief Model in relation to the uptake of organic farming by Iranian farmers.$h[electronic resource]
260 $c2022
520 $aOrganic Farming (OF) is a response to challenges caused by conventional or intensive agriculture. Successful organic production depends on farmers choosing to grow organic products. The main goal of this study is to analyze and identify factors affecting farmers' willingness to implement OF in southwest Iran. For this, we borrowed the health belief model (HBM) from the health psychology domain. The study, a questionnaire-based cross-sectional survey in Behbahan County, Khuzestan province, in southwest Iran, comprises 320 farmers who were selected through a multistage random sampling technique. The structural equations modeling reveals that four variables - cue to action, perceived barriers, general beliefs, and perceived benefits - account for 54% of the variance in farmers' willingness toward OF. Furthermore, cue to action is the most important factor determining farmer willingness towards implementing OF. The results reveal that HBM has appropriate explanatory power and is an effective tool for investigating farmer willingness toward OF. It is suggested that government agencies use socio-psychological frameworks to develop organic agriculture. Additionally, as government agencies develop policies that increase OF, the consideration of how farmers perceive the benefits and barriers of implementing OF is critical, along with understanding their general beliefs and concerns about the use of chemical fertilizers and pesticides in conventional agriculture. Offering extension services is also key.
650 $aRisk perception
650 $aSustainable agriculture
650 $aAgricultura Sustentável
653 $aGreen production
653 $aPreventive behavior
700 1 $aMOGHADAM, M. T.
700 1 $aZOBEIDI, T.
700 1 $aTURETTA, A. P. D.
700 1 $aEUFEMIA, L.
700 1 $aSIEBER, S.
773 $tJournal of Environmental Planning and Management$gv. 65, n. 5, p. 907-929, 2022.
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Registro original: |
Embrapa Solos (CNPS) |
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