A Public Program to Evaluate Commercial Soybean Cultivars for Pathogen and Pest Resistance

Chawla, Shilpi; Bowen, C. R.; Slaminko, T. L.; Hobbs, H. A.; Hartman, G. L.

doi:10.1094/pdis-05-12-0479-fe

Cited by 28 publications

(27 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This single isolate had been used extensively in a previous study of soybean reaction to S. sclerotiorum (Chawla et al, 2013). Bulk of sclerotia collected in the field, or reproduced on potato dextrose agar, PDA (Difco Laboratories, Detroit, MI, USA) medium, were air-dried, then collected and stored in capped tubes at 4°C.…”

Section: Methodsmentioning

confidence: 99%

Mycelial compatibility and aggressiveness of Sclerotinia sclerotiorum isolates from Brazil and the United States

Koga

Bowen

Godoy

et al. 2014

Pesq. agropec. bras.

View full text Add to dashboard Cite

-The objective of this work was to evaluate the genetic diversity among Sclerotinia sclerotiorum isolates from Brazil and the USA, assess their aggressiveness variability, and verify the existence of an isolate-cultivar interaction. Isolate variability was determined by mycelial compatibility grouping (MCG), and isolate aggressiveness by cut-stem inoculations of soybean cultivars. Two experiments for MCGs and two for aggressiveness were conducted with two sets of isolates. The first set included nine isolates from the same soybean field in Brazil and nine from the Midwest region of the USA. The second set included 16 isolates from several regions of Brazil and one from the USA. In the first set, 18 isolates formed 12 different MCGs. In the second set, 81% of the isolates from Brazil grouped into a single MCG. No common MCGs were observed among isolates from Brazil and the USA. The isolates showed aggressiveness differences in the first set, but not in the second. Although aggressiveness differed in the first set, soybean cultivars and isolates did not interact significantly. Cultivar rank remained the same, regardless of the genetic diversity, aggressiveness difference, and region or country of origin of the isolate. Results from screening of soybean cultivars, performed by the cut-stem method in the USA, can be used as reference for researchers in Brazil.Index terms: Glycine max, Sclerotinia stem rot, disease resistance, screening of cultivars, white mold. Termos para indexação: Glycine max, podridão-de-esclerotinia, resistência a doenças, seleção de cultivares, mofo-branco. Compatibilidade micelial e agressividade de isolados de Sclerotinia sclerotiorum do Brasil e dos Estados Unidos

show abstract

Section: Methodsmentioning

confidence: 99%

Mycelial compatibility and aggressiveness of Sclerotinia sclerotiorum isolates from Brazil and the United States

Koga

Bowen

Godoy

et al. 2014

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…The expansion of agricultural frontiers, together with an improvement of environmental conditions and genetic enhancement, have led to an increase in soybean production (Oliveira et al, 2012;Chawla et al, 2013). The worldwide production of soybean crops in 2013/14 was 283.54 million tons, with an average productivity of 2541 kg/ha.…”

Section: Introductionmentioning

confidence: 99%

Selection for wide adaptability and high phenotypic stability of Brazilian soybean genotypes

et al. 2016

View full text Add to dashboard Cite

ABSTRACT. Advances in genetic enhancement techniques have led to an increase in soybean production. Thus, soybean is currently one the most economically important cultured species worldwide. The objectives of the present study were to study the interaction of soybean genotypes per environment in terms of grain productivity and to evaluate their phenotypic adaptability and stability, with the final aim of selecting lineages with high productivity, wide adaptability, and high stability. Seven soybean genotypes, consisting of five lineages developed by the soybean genetic enhancement program of the Universidade Federal de Uberlândia (Brazil) and two controls, were evaluated during several annual cycles in seven different environments. A randomized complete block design (RCBD) with three replicates was adopted in each site. This study followed the methodology proposed by Eberhart and Russel and Lin and Binns, with modifications by Carneiro, and the AMMI (additive main effects and multiplicative interaction model) analysis. The average productivity of soybean cultivars in the trials was 2739.26 kg/ha. The L01V13 genotype and the UFUS Guarani cultivar had wide adaptation according to the methodology proposed by Eberhart and Russel and Lin and Binns, with modifications by Carneiro. When analyzed with the AMMI model, the UFUS Guarani cultivar showed high stability. In general, the methodologies studied are complementary and, when used together, increase the reliability of the classification, providing support for the use of specific soybean cultivars in different environments.

show abstract

“…Disease incidence was calculated as: % incidence = (number of plants showing SDS symptoms/ total plants) × 100. Due to the increased defoliation and plant death in the greenhouse compared with the field trials, a 1-7 scale was used to rate disease severity, where: 1 = leaves showing general yellowing and /or blotches; 2 = leaves with obvious, interveinal chlorosis; 3 = leaves with necrosis along a portion of the margin; 4 = necrosis along the entire leaf margin; 5 = interveinal necrosis and more than 50% of leaf tissue is necrotic; 6 = most of leaf area is necrotic and plants are defoliated with new growth; and 7 = dead and defoliated plants (Chawla et al 2013). DX was calculated as: DX = {% incidence × [(severity/7) × 100]}/100.…”

Section: Greenhouse Experimentsmentioning

confidence: 99%

Effect of fungicide seed treatments onFusarium virguliformeinfection of soybean and development of sudden death syndrome

Weems

Haudenshield

Bond

et al. 2015

Canadian Journal of Plant Pathology

View full text Add to dashboard Cite

Sudden death syndrome (SDS), caused by Fusarium virguliforme (Fv), is a major yield-limiting disease of soybean in North America. Infection of soybean seedling roots by Fv results in severe root damage; therefore, fungicide seed treatments could potentially reduce these early-season infections and reduce severity of foliar symptoms that typically occur later in the season. Multiple fungicide seed treatment combinations were evaluated for their effects on Fv infection, DNA concentrations in roots, soybean root development, and SDS development in the field, greenhouse and laboratory trials. Several seed treatments decreased root disease symptoms compared with the non-treated inoculated control in the laboratory assay, and the biological seed treatment, Bacillus pumilus, significantly decreased seedling development and increased SDS root disease compared with the non-treated inoculated control. In the greenhouse, Fv DNA concentrations in roots were reduced by a treatment combining mefenoxam + thiophanate-methyl + azoxystrobin + Bacillus pumilus + prothioconazole + fludioxonil compared with the non-treated control; however, the reduction in Fv DNA did not improve root growth or decrease SDS symptoms compared with the non-treated control. Field trials were conducted in Valmeyer, IL in 2008 and in Urbana, IL in 2008 and 2009. Seed treatments had no effect on the concentration of Fv DNA in soybean roots and had very little effect on root morphology. At the Valmeyer location, most seed treatments significantly decreased SDS symptoms compared with the control. In summary, no consistent, significant effects of the seed treatments evaluated in this study on SDS or Fv root infection were observed. Therefore, soybean growers should continue to utilize other practices for SDS management until new seed treatments with consistent efficacy in controlling SDS are available.Résumé: Le syndrome de la mort subite (SMS), causé par Fusarium virguliforme, est une importante maladie du soya qui en réduit les rendements en Amérique du Nord. L'infection causée par F. virguliforme et qui touche les racines des semis de soya entraîne de graves dommages; en conséquence, le traitement des semences avec un fongicide pourrait réduire ces infections de début de saison et atténuer la gravité des symptômes foliaires qui apparaissent généralement plus tard dans la saison. Des traitements faisant appel à des combinaisons de plusieurs fongicides ont été évalués pour en vérifier les effets sur l'infection causée par F. virguliforme, les concentrations d'ADN de F. virguliforme dans les racines, le développement des racines de soya ainsi que sur l'apparition du SMS au cours d'essais menés en champ, en serre et en laboratoire. Lors d'essais menés en laboratoire, plusieurs traitements ont atténué les symptômes relatifs à la maladie des racines, comparativement aux témoins inoculés et non traités. Par contre, le traitement biologique Bacillus pumilus a significativement réduit le développement des semis et accru le SMS, comparativement aux témoins inoculés ...

show abstract

A Public Program to Evaluate Commercial Soybean Cultivars for Pathogen and Pest Resistance

Cited by 28 publications

References 10 publications

Mycelial compatibility and aggressiveness of Sclerotinia sclerotiorum isolates from Brazil and the United States

Mycelial compatibility and aggressiveness of Sclerotinia sclerotiorum isolates from Brazil and the United States

Selection for wide adaptability and high phenotypic stability of Brazilian soybean genotypes

Effect of fungicide seed treatments onFusarium virguliformeinfection of soybean and development of sudden death syndrome

Contact Info

Product

Resources

About