Caracteres epidemiológicos e uso da análise de agrupamento para resistência parcial à ferrugem da soja

Santos, Juliana Araújo; Juliatti, Fernando Cézar; Santos, Verônica Araújo; Polizel, Analy Castilho; Juliatti, F. C.; Hamawaki, Osvaldo Toshiyuki

doi:10.1590/s0100-204x2007000300019

Cited by 23 publications

(19 citation statements)

References 2 publications

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“…PESSOA (1994), BASSETO et al (2007), NAVARINI et al (2007), SANTOS et al (2007, EMBRAPA (2008) LUDWIG et al (2010) and FINOTO et al (2011 stated that the importance of disease control in soybeans has been proven to prevent losses in the experimental conditions where the average of the control plots (without aerial fungicide application) was approximately 70% of the plot yields with chemical. Late season leaf diseases did not affect the crop to the point of significantly differ between treatments, with a confidence level greater than 95% for the final population, pods per plant and grains per pod variables.…”

Section: Resultsmentioning

confidence: 99%

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Fungicide application using a trailing boom in soybean fields

Neto

Fornari²,

Bauer

et al. 2013

Eng. Agríc.

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ABSTRACT:The objective of this study was to determine the effects in the yield of soybean crop utilizing a trailing boom sprayer for chemical control of late season diseases. The experimental design was randomized blocks with 04 treatments, which consisted of applying fungicides with a traditional sprayer, trailing boom, the traditional sprayer plus the trailing boom simultaneously and control (without fungicide aerial application) in 05 repetitions per treatment. The variables evaluated were: final plant population, pods per plant, grains per pod, weight of one thousand grains and yield. It was concluded that the control of foliar diseases with fungicides presented weight of one thousand grains and yield significantly higher than the average of plots without fungicide application. The trailing boom did not significantly affect the yield compared to the technology currently used.

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Section: Resultsmentioning

confidence: 99%

“…The incidence and severity of these vary according to each crop variety, crop rotation, weather conditions and pathogens inoculum source. Without proper control diseases have the potential to cause losses of up to 100% of production (SANTOS et al, 2007;EMBRAPA, 2008;LUDWIG et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Fungicide application using a trailing boom in soybean fields

Neto

Fornari²,

Bauer

et al. 2013

Eng. Agríc.

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“…The intensity of sporulation and periodic severity assessment are important parameters for the classification of genotypes into tolerant or susceptible to ASR. Results presented by Santos et al (2007), showed the presence of minor genes conferring tolerance to ASR in the Brazilian soybean germplasm. This information can be useful to plant breeders and plant pathologists, to group these genes together in different genotypes, with or without the use of molecular markers.…”

Section: Introductionmentioning

confidence: 94%

“…Koga et al (2008) used multivariated analysis, Costa et al (2008) used markers andSantos et al (2007) evaluated the genotypes partial resistance through epidemiologic and cluster analysis.…”

Section: Introductionmentioning

confidence: 99%

Characterization of soybean genotypes for Asian soybean rust reaction

Araujo

Vello²

2010

Crop Breed. Appl. Biotechnol.

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Our objective was to characterize soybean experimental lines for Asian soybean rust reaction. In the 2004/2005 growing season, three experiments were conducted with middle-cycle and three with late-cycle genotypes, designed in randomized blocks with four replications. Twelve experimental lines and two cultivars of each cycle were used. In each experiment the plant management differs as follows: three applications of carbendazim or three of flutriafol or without applications. The experimental lines with high yield, low notes to the symptoms and resistance to lodging, were selected and tested again in the 2005/2006 growing season. Genotypes with high severity and yield were considered tolerant to rust and the low severity and high yield ones as moderately resistant. Among the medium-cycle genotypes, there was moderate resistance to rust in one line and tolerance in five. Among the late-cycle genotypes, the six lines showed moderate resistance. The line USP 97-08135 is more tolerant to rust.

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“…Recentemente, no Brasil, diversos trabalhos têm sido realizados para se conhecer os mecanismos de resistência à ferrugem-asiática-da-soja, sejam estes qualitativos (Santos et al, 2007;Silva et al, 2007;Costa et al, 2008;Laperuta et al, 2008;Morceli et al, 2008) ou quantitativos (Koga et al, 2008;Ribeiro et al, 2009aRibeiro et al, , 2009bCruz et al, 2011). A associação de mecanismos qualitativos, por meio da piramidação de genes de resistência, e de mecanismos quantitativos, de resistência horizontal, deve ser utilizada como estratégia dos programas de melhoramento de soja, para que se possa obter resistência mais duradoura.…”

Section: Iniciadorunclassified

Variabilidade genética de Phakopsora pachyrhizi avaliada por meio de marcadores microssatélites

Tschurtschenthaler

Vieira

Nora³

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a variabilidade genética da ferrugem-asiática-da-soja no Brasil, com uso de marcadores microssatélites. Populações de esporos de Phakopsora pachyrhizi coletadas nas regiões Sul, Sudeste e Centro Oeste do país foram submetidas à análise de variabilidade genética, avaliada por meio de marcadores microssatélites específicos para o fungo. Foram coletadas, também, populações de fungo em diversas variedades de soja em uma mesma localidade, incluindo populações com lesão "reddish-brown" (RB). Entre essas populações, não houve variabilidade. Tecidos com lesões RB não apresentaram esporos do fungo e não amplificaram com os marcadores específicos para P. pachyrhizi. A variabilidade genética entre as populações coletadas nas três regiões variou de 0 a 0,36. Observou-se tendência de agrupamento das populações da região Sul e Centro Oeste do Brasil em grupos diferentes. A existência de variabilidade genética em populações de P. pachyrhizi é um indicativo de que a resistência genética vertical, conferida por genes únicos, é uma estratégia de risco para os programas de melhoramento genético que visam a resistência à ferrugem-asiática-da-soja no Brasil.Termos para indexação: Glycine max, diversidade genética, ferrugem-asiática-da-soja, resistência genética, resistência vertical, SSR. Genetic variability of Phakopsora pachyrhizi accessed by microsatellite markersAbstract -The objective of this work was to evaluate the genetic variability of Asian soybean rust in Brazil using microsatellite markers. Samples of Phakopsora pachyrhizi spores collected in the Southern, Southeastern, and Central West regions of Brazil were subjected to analysis of genetic variability, accessed with microsatellite markers specific for the fungus. Spores of the fungus were also collected in several soybean varieties in a same locality, including samples with reddish-brown (RB) lesions. Among these samples, there was no variability. Tissues with RB lesions did not contain spores of the fungus and did not amplify with the specific markers for P. pachyrhizi. Genetic variability among samples collected in the three regions ranged from 0 to 0.36. A tendency to cluster samples of the Southern and Central West regions of Brazil in different groups was observed. The existence of genetic variability in P. pachyrhizi spore populations indicates that vertical genetic resistance, provided by single genes, is a risky strategy for soybean breeding programs that aim resistance to Asian soybean rust.

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Caracteres epidemiológicos e uso da análise de agrupamento para resistência parcial à ferrugem da soja

Cited by 23 publications

References 2 publications

Fungicide application using a trailing boom in soybean fields

Fungicide application using a trailing boom in soybean fields

Characterization of soybean genotypes for Asian soybean rust reaction

Variabilidade genética de Phakopsora pachyrhizi avaliada por meio de marcadores microssatélites

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