scholarly journals Evaluation of Resistance Soybean (Glycine max) Germplasm Accession to Rust Disease (Phakopsora pachyrhizi)

2018 ◽  
Vol 197 ◽  
pp. 012033
Author(s):  
Sumartini ◽  
Suhartina
Keyword(s):  
Glycine Max ◽  
Phakopsora Pachyrhizi ◽  
Rust Disease

scholarly journals Characterization of three soybean landraces resistant to Asian soybean rust disease

2020 ◽  
Vol 40 (6) ◽  
Author(s):  
Luciano Nobuhiro Aoyagi ◽  
Yukie Muraki ◽  
Naoki Yamanaka
Keyword(s):  
Susceptible Variety ◽  
Soybean Rust ◽  
Resistance Locus ◽  
Chromosome 6 ◽  
Phakopsora Pachyrhizi ◽  
Rust Disease ◽  
Asian Soybean Rust ◽  
The World ◽  
Trait Locus

Abstract Phakopsora pachyrhizi is an obligatory biotrophic fungus that causes Asian soybean rust (ASR) disease. ASR control primarily involves chemical control and the use of resistant soybean cultivars carrying an Rpp (resistance to P. pachyrhizi) gene. This study aimed to characterize the ASR resistance of three soybean Asian landraces. By screening the world core collection (WC) of soybean, which consists of 80 varieties, three landraces were identified in Southeast Asia as resistant to ASR. Genetic mapping using the F2 population derived from a cross with an ASR-susceptible variety, BRS 184, indicated that KS 1034 (WC2) has ASR resistance conferred by a single dominant resistance gene, mapped on chromosome 18, in the same region where Rpp1 was mapped previously. The BRS 184 × WC61 (COL/THAI/1986/THAI-80) F2 population, on the other hand, showed an ASR resistance locus mapped by quantitative trait locus analysis on chromosome 6, in the region where the resistance conferred by PI 416764 Rpp3 resides, with a logarithm of the odds score peak at the same position as the marker, Satt079, while the BRS 184 × WC51 (HM 39) population showed the resistance to ASR allocated between Satt079 and Sat_263 markers, also in the region where Rpp3 was mapped previously. Both WC51 and WC61 have the same infection profile as FT-2 and PI 462312 when tested against the same ASR isolate panel. These three WCs can be used in MAS programs for introgression of Rpp1 and Rpp3 and the development of ASR-resistant cultivars in the breeding program.

Transcriptome analysis of a compatible response by Glycine max to Phakopsora pachyrhizi infection

Plant Science ◽  
2010 ◽  
Vol 179 (3) ◽  
pp. 183-193 ◽  
Author(s):  
Arianne Tremblay ◽  
Parsa Hosseini ◽  
Nadim W. Alkharouf ◽  
Shuxian Li ◽  
Benjamin F. Matthews
Keyword(s):  
Glycine Max ◽  
Transcriptome Analysis ◽  
Phakopsora Pachyrhizi

scholarly journals Gene Expression in Leaves of Susceptible Glycine max during Infection with Phakopsora pachyrhizi Using Next Generation Sequencing

Sequencing ◽  
2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Arianne Tremblay ◽  
Parsa Hosseini ◽  
Nadim W. Alkharouf ◽  
Shuxian Li ◽  
Benjamin F. Matthews
Keyword(s):  
Soybean Rust ◽  
Cdna Libraries ◽  
Phakopsora Pachyrhizi ◽  
Rust Disease ◽  
Illumina Platform ◽  
Molecular Events ◽  
Genes Encoding ◽  
Exotic Pathogen ◽  
Soybean Leaves ◽  
Host Genes

Soybean rust is caused by the obligate biotrophic fungus Phakopsora pachyrhizi, an exotic pathogen causing important yield losses in soybean production. We used an mRNA-Seq strategy to analyze the expression pattern of soybean genes and better understand molecular events occurring in soybean following the infection. cDNA libraries were constructed from RNA isolated from whole infected soybean leaves 10 days after inoculation with P. pachyrhizi and sequenced using an Illumina platform to identify soybean genes that are affected by pathogen growth. We obtained 15 million sequences corresponding to soybean genes. Forty-two percent of the genes were downregulated including genes encoding proteins involved in amino acid metabolism, carbohydrate metabolism, and transport facilitation; 31% were upregulated including genes encoding proteins involved in lipid metabolism, glycan biosynthesis, and signal transduction. Candidate host genes identified in this study will be manipulated to assay their potential to control soybean rust disease.

scholarly journals Intensidade da ferrugem asiática (Phakopsora pachyrhizi H. Sydow & P. Sydow) da soja [Glycine max (L.) Merr.] nas cultivares Conquista, Savana e Suprema sob diferentes temperaturas e períodos de molhamento foliar

2007 ◽  
Vol 33 (3) ◽  
pp. 239-244 ◽  
Author(s):  
Marcelo Carvalho Alves ◽  
Edson Ampélio Pozza ◽  
Josimar Batista Ferreira ◽  
Dejânia Viera de Araújo ◽  
João de Cássia do Bomfim Costa ◽  
...  
Keyword(s):  
Glycine Max ◽  
Phakopsora Pachyrhizi ◽  
Glycine Max L

A Ferrugem Asiática (Phakopsora pachyrhizi H. Sydow & P. Sydow), relatada em diversas regiões do globo terrestre de climas tropicais e subtropicais, causa redução significativa na produtividade da soja [Glycine max (L.) Merr.]. Fatores bióticos como interação patógeno-hospedeiro e abióticos influenciam o progresso da doença. Objetivou-se neste trabalho estudar os efeitos da temperatura e de períodos de molhamento foliar no progresso da Ferrugem Asiática nas cultivares Conquista, Savana e Suprema. O experimento foi conduzido no Departamento de Fitopatologia da Universidade Federal de Lavras, em junho de 2004, em câmaras de crescimento vegetal nas temperaturas de 15, 20, 25 e 30 °C e períodos de molhamento foliar de 0, 6, 12, 18 e 24 horas. A inoculação foi realizada pulverizando-se as plantas com suspensão de 10(4) uredósporos de P. pachyrhizi.mL-1 de água. Dados da incidência e da severidade foram utilizados para avaliar o progresso da doença e integrados por meio da área abaixo da curva de progresso da incidência (AACPI) e da severidade (AACPS). Modelos de regressão não-linear foram ajustados para a AACPI e AACPS. Foi calculado o volume abaixo da superfície de resposta para incidência (VASRI) e severidade (VASRS) em relação à temperatura e molhamentos foliares com o objetivo de detectar diferenças entre cultivares. Molhamentos foliares acima de 15 horas e temperaturas próximas a 20 ºC, nas 3 cultivares avaliadas, determinaram maior intensidade da Ferrugem Asiática. Temperaturas próximas a 30 e 15 ºC ocasionaram menor intensidade da doença. Períodos de molhamento foliar abaixo de 6 horas reduziram a intensidade da doença. Todas as cultivares testadas foram suscetíveis à doença, entretanto, a cultivar Conquista apresentou maior VASRI e VASRS da Ferrugem Asiática comparada às cultivares Savana e Suprema, as quais não diferiram estatisticamente. Houve diferença entre as cultivares para AACPI em cada temperatura e molhamento foliar.

Mapping and confirmation of two genes conferring resistance to soybean rust ( Phakopsora pachyrhizi ) in the soybean line UG‐5 ( Glycine max )

2020 ◽  
Vol 139 (5) ◽  
pp. 932-942
Author(s):  
Chandra Paul ◽  
Glen L. Hartman ◽  
Brian W. Diers ◽  
David R. Walker
Keyword(s):  
Glycine Max ◽  
Soybean Rust ◽  
Phakopsora Pachyrhizi ◽  
Soybean Line

scholarly journals Effect of Silicon Absorption on Soybean Resistance to Phakopsora pachyrhizi in Different Cultivars

Plant Disease ◽  
2012 ◽  
Vol 96 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Geneviève Arsenault-Labrecque ◽  
James G. Menzies ◽  
Richard R. Bélanger
Keyword(s):  
Glycine Max ◽  
Soybean Rust ◽  
Phakopsora Pachyrhizi ◽  
Chemical Analyses ◽  
Disease Symptoms ◽  
Soybean Cultivars ◽  
Soybean Resistance ◽  
Soybean Plants ◽  
Si Content ◽  
Innate Ability

Silicon (Si) is recognized for its prophylactic role in alleviating diseases when absorbed by plants and has been proposed as a possible solution against soybean rust, caused by Phakopsora pachyrhizi. However, little is known about its potential effects on soybean (Glycine max) because the plant's ability to absorb Si is poorly defined. In this work, our objectives were to evaluate and quantify the absorption of Si in leaves of different soybean cultivars and to determine if such absorption was able to enhance resistance to soybean rust. In a first set of experiments with cv. Williams 82, hydroponic plants were supplied or not with Si and inoculated with urediniospores of P. pachyrhizi. Chemical analyses revealed no significant differences in the plants' Si content regardless of the treatment, which translated into no effect on rust incidence. However, in a second set of experiments with different cultivars, plants of Korean cultivar Hikmok sorip absorbed nearly four times more Si than those of Williams 82. At the same time, plants from this cultivar exhibited a near absence of disease symptoms when supplied with Si. This resistance appeared to be the result of hypersensitive (HR) reactions that were triggered when plants were fed with Si. These results support the concept that a plant's innate ability to absorb Si will dictate the benefits conferred by a treatment with Si and provide evidence that Si can protect soybean plants against soybean rust through mediated resistance.

scholarly journals Eficacia de fungicidas para el control de manchas foliares en soja en el distrito de Minga Guazú, Paraguay

Agrotecnia ◽  
2021 ◽  
pp. 31
Author(s):  
Guillermo A. Enciso-Maldonado ◽  
Marco Maidana-Ojeda ◽  
Pablo R. Machuca Aquino ◽  
Marta A. Fernández Gamarra ◽  
José A. Schlicmann-Tank
Keyword(s):  
Glycine Max ◽  
Phakopsora Pachyrhizi ◽  
Glycine Max L

Las enfermedades son una de las mayores limitantes fitosanitarias en el cultivo de soja [Glycine max (L.) Merr.], entre ellas las enfermedades de final de ciclo (EFC) son las protagonistas en ausencia de la roya asiática de la soja (Phakopsora pachyrhizi). Este trabajo presenta los resultados de evaluaciones a campo de la eficacia de diferentes fungicidas en el control de las EFC en el cultivo de soja. El ensayo se realizó en Minga Guazú, Alto Paraná, Paraguay. Se utilizó la variedad NA 5909 RR. Los ingredientes activos evaluados fueron Bixafen + Protioconazole + Trifloxistrobin (T2), Picoxystrobin + Protioconazole (T3), Picoxystrobin + Cyproconazole (T4), Fluxapyroxad + Epoxiconazole + Pyraclostrobin (T5), (Benzovindiflupyr + Azoxistrobina) + Difenoconazole + Ciproconazole (T6), Mancozeb (T7) y Carbendazim (T8). Las aspersiones se realizaron según la ocurrencia de los estadios fenológicos R1, R3 y R5. Las principales variables evaluadas fueron la severidad, eficacia de control (EC) y rendimiento en kg ha1 . La menor severidad se observó con el T5, mientras que T8 no fue efectivo para reducir la severidad; los tratamientos T5, T6 y T2 fueron los más eficaces para controlar las EFC, diferenciándose significativamente de los demás tratamientos. Los tratamientos T2, T3, T4, T5, T6 y T7 obtuvieron los mejores rendimientos y fueron estadísticamente similares. El T8 mostró el menor rendimiento y peso de mil semillas. En conclusión, la mayoría de los fungicidas presentaron un buen control sobre las EFC, así también sobre el rendimiento de la soja.

scholarly journals REACCIÓN DE GERMOPLASMA DE SOYA A Phakopsora pachyrhizi EN CAMPO

2014 ◽  
Vol 37 (3) ◽  
pp. 225 ◽  
Author(s):  
María de los Ángeles Peña-del-Río ◽  
Nicolás Maldonado-Moreno ◽  
Arturo Díaz-Franco
Keyword(s):  
Glycine Max ◽  
Phakopsora Pachyrhizi ◽  
Glycine Max L

La roya asiática (Phakopsora pachyrhizi) de la soya (Glycine max (L.) Merr.), hizo su aparición en 2005 en México. Las variedades comerciales comúnmente sembradas han mostrado susceptibilidad al patógeno, por lo que el presente estudio tuvo el objetivo buscar fuentes de resistencia genética a la enfermedad, a través de la reacción de 197 genotipos de soya evaluados en campo. Se establecieron dos fechas de siembra (24 de febrero y 24 de abril, 2007) y las inoculaciones se hicieron a inicio de la floración. La severidad se evaluó en la etapa R6, mediante una escala de 1(0 %) a 3 (> 30 %). Se identificaron 23 genotipos de soya resistentes a P. pachyrhizi, en ambas fechas de siembra, los cuales no exhibieron lesiones foliares.

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