Frequency and Pathogenicity of Fusarium solani Recovered from Soybeans with Sudden Death Syndrome

Rupe, J. C.

doi:10.1094/pd-73-0581

Cited by 151 publications

(97 citation statements)

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“…has been reported in North America (Rupe, 1989) and several South American countries (Nakajima et al, 1996;Wrather et al, 1997;O'Donnell et al, 2010). Prior to the recognition that four closely related Fusarium spp.…”

Section: Introductionmentioning

confidence: 99%

“…Even when cultivars are screened in artificially infested soil, disease incidence is unpredictable due to the sensitivity of symptomology to environmental factors Rupe et al, 1996;Farias Neto et al, 2008). Methods for assessing aggressiveness (i.e., amount of disease induced) in greenhouse studies include using soil infestation by growing the pathogen on sorghum grain (Hartman et al, 1997Huang & Hartman, 1998;Cho et al, 2001;Rupe et al, 2001;Mueller et al, 2002aMueller et al, , 2002bMueller et al, , 2003Aoki et al, 2005;Farias Neto et al, 2008;Franco et al, 2009), oat seeds (Scherm & Yang, 1996), sand-cornmeal Gray et al, 1999;Njiti et al, 2001), culture filtrates (Jin et al, 1996;Li et al, 1999), inoculation via a toothpick method Arruda et al, 2005), colonized agar plugs (Rupe, 1989), a detached leaf method (Franco et al, 2009) and conidial suspensions (Rupe et al, 1996;Njiti et al, 2001). Development of an accurate disease scoring method for screening resistance to these pathogens, in a rapid and uniform way in the greenhouse, is crucial for developing soybean cultivars with broadbased resistance to the SDS pathogens.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of inoculation methods for characterizing relative aggressiveness of two soybean sudden-death syndrome pathogens, Fusarium virguliforme and F. tucumaniae

Scandiani¹,

Ruberti²,

Giorda³

et al. 2011

Trop. plant pathol.

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Fusarium tucumaniae and F. virguliforme are the primary etiological agents of sudden-death syndrome (SDS) of soybean in Argentina and the United States, respectively. Five isolates of F. tucumaniae and four isolates of F. virguliforme were tested for relative aggressiveness to soybean, using a toothpick inoculation method and two versions of a soil infestation inoculation method. Partially resistant soybean cultivar RA629 and susceptible cultivar A6445RG were inoculated separately with each of the nine isolates. Two experiments for each inoculation method were performed. Analysis of variance identified a significant three-way interaction of soybean cultivar*experiment*SDS pathogen (P = 0.01) using the different methods. When the two soil infestation methods were used, F. virguliforme was more aggressive than F. tucumaniae; however, when using the toothpick method, isolates of F. virguliforme and F. tucumaniae were equally aggressive. Although all three methods discriminated levels of partial resistance of the genotypes to SDS, results of the present study indicated that soil inoculations with sorghum infested grain represent the best method for evaluating soybean cultivar resistance to SDS. The existence of interactions among the host, pathogen and environmental conditions highlights the need for additional studies to improve the reproducibility of tests for screening soybean germplasm for resistance to SDS.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of inoculation methods for characterizing relative aggressiveness of two soybean sudden-death syndrome pathogens, Fusarium virguliforme and F. tucumaniae

Scandiani¹,

Ruberti²,

Giorda³

et al. 2011

Trop. plant pathol.

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“…Vascular discoloration, necrosis of secondary roots and root rot may be observed on roots and stems. Severely infected plants can be easily pulled from the soil, and on their roots there is often a bluish fungal sporulation composed of macroconidia in sporodochia (Hirrel, 1983;Rupe, 1989;Roy, 1997b).…”

Section: Introductionmentioning

confidence: 99%

Morphological and molecular characterization of the sudden‐death syndrome pathogen of soybean in Brazil

et al. 2005

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Brazilian Fusarium isolates causing soybean sudden death syndrome (SDS) were characterized by comparing them with other Fusarium isolates associated with soybean root rot, as well as F. solani f.sp. glycines isolates associated with the disease in the USA, using molecular (mitochondrial and nuclear rDNA), morphological, cultural and pathogenic characteristics. On the basis of pathogenicity data, and restriction fragment length polymorphism and sequence analysis of the rDNA internal transcribed spacer (ITS) regions, isolates formed a group distinct from nonSDS F. solani isolates, as well as other Fusarium species. ITS sequence analysis also revealed that Brazilian isolates were distinct from the majority of SDS pathogens from the USA ( Fusarium virguliforme ) and conformed to Fusarium tucumaniae .

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“…phaseoli (Roy et al, 1989;Rupe, 1989;O'Donnell & Gray, 1995;Achenbach et al, 1996) and F. solani f. sp. glycines (Rupe, 1989;Roy, 1997) results in severe field losses of soybean in the U.S. (Wrather et al, 1995(Wrather et al, , 1997, Argentina, and Brazil (Rupe & Hartman, 1999).…”

Section: Introductionmentioning

confidence: 99%

Identification of quantitative trait loci for resistance against soybean sudden death syndrome caused by Fusarium tucumaniae

Yamanaka

Fuentes

Gilli

et al. 2006

Pesq. agropec. bras.

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-The objective of this work was to identify genomic regions that underlie resistance to Fusarium tucumaniae sp. nov., the causing agent of sudden death syndrome (SDS) in soybean in South America, using a population with a genetic background different from that previously reported for Fusarium virguliforme sp. nov. (F. solani f. sp. glycines), also responsible for SDS in soybean. Although major genes and quantitative trait loci (QTL) for SDS resistance have been identified, little is known about the same disease caused by Fusarium tucumaniae sp. nov., in South America. To identify genetic factors related to resistance to F. tucumaniae and DNA markers associated with them, a QTL analysis was performed using recombinant inbred lines. The map locations of the four loci, here identified, differed from those SDS resistance QTL previously described. It was screened a residual heterozygous line (RHL), which was heterozygous around the most effective QTL, RSDS1, and homozygous for the other genomic regions. The genetic effect of RSDS1 was confirmed using near-isogenic lines (NIL) derived from the RHL. The line which was homozygous for the Misuzudaizu genotype showed resistance levels comparable with that of the line homozygous for the Moshidou Gong 503 genotype.Index terms: Glycine max, disease index, residual heterozygous line, SDS. Identificação de locos controladores de características quantitativaspara resistência contra a síndrome da morte súbita da soja causada por Fusarium tucumaniaeResumo -O objetivo deste trabalho foi identificar as regiões genômicas responsáveis pela resistência ao Fusarium tucumaniae sp. nov., agente causador da síndrome da morte súbita (SDS) da soja na América do Sul, utilizandose uma população com background genético diferente daqueles relatados, anteriormente, para o Fusarium virguliforme sp. nov. (F. solani f. sp. glycines), também responsável por SDS em soja. Embora genes de efeito maior e locos de características quantitativas (QTL) para resistência a SDS tenham sido identificados, pouco se conhece sobre essa mesma doença causada por Fusarium tucumanie sp. nov., na América do Sul. Com a finalidade de identificar fatores genéticos relacionados com a resistência a F. tucumaniae e marcadores de DNA associados a esses fatores, foram conduzidas análises de QTL em linhagens puras recombinantes. A localização de quatro locos identificados diferem de QTL anteriormente descritos para resistência à SDS. Uma linha heterozigótica residual (RHL) foi analisada e mostrou-se heterozigótica próxima ao QTL mais efetivo, RSDS1, e homozigótica para outras regiões genômicas. O efeito genético de RSDS1 foi confirmado, usando-se linhas quase-isogênicas derivadas da RHL. Observou-se que a linha homozigótica para o genótipo Misuzudaizu mostrou resistência similar à da linha homozigótica para o genótipo Moshidou Gong 503.Termos para indexação: Glycine max, índice de doença, linha heterozigota residual, SDS.

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Frequency and Pathogenicity of Fusarium solani Recovered from Soybeans with Sudden Death Syndrome

Cited by 151 publications

References 0 publications

Comparison of inoculation methods for characterizing relative aggressiveness of two soybean sudden-death syndrome pathogens, Fusarium virguliforme and F. tucumaniae

Comparison of inoculation methods for characterizing relative aggressiveness of two soybean sudden-death syndrome pathogens, Fusarium virguliforme and F. tucumaniae

Morphological and molecular characterization of the sudden‐death syndrome pathogen of soybean in Brazil

Identification of quantitative trait loci for resistance against soybean sudden death syndrome caused by Fusarium tucumaniae

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