Characterization of soybean genotypes for Asian soybean rust reaction

Araujo, Milena Moura de; Vello, Natal Antônio

doi:10.1590/s1984-70332010000300003

Cited by 11 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(2022) evaluated the same genotypes as those in the present work and observed that HSW contributed the most to genetic divergence. Genotypes with large seeds have shown tolerance to rust in similar studies (de Araujo & Vello, 2010); in addition, large seeds are desirable for consumption as edamame (Shanmugasundaram, 2010). However, Williams (2015) observed that higher seed mass (>20 g 100 seed –1 ) can be detrimental to soybean's establishment.…”

Section: Discussionmentioning

confidence: 78%

Impact of Asian soybean rust on vegetable soybean, considering two stages of development

et al. 2023

View full text Add to dashboard Cite

Diseases can cause negative impacts during all stages of development of soybean [Glycine max (L.) Merr.] Asian soybean rust (ASR) (caused by Phakopsora pachyrhizi) is the most destructive. The impact of ASR on vegetable soybean (consumed when the seeds are still immature) have not been studied rigorously. Thus, in a 2-yr study, we assessed 42 F 6 lines from crosses of soybean vegetable genotypes and three commercial cultivars ('BRS 257', 'BRS 267' and 'IAC 100') in two sites. During the R 6 and R 8 development stages, the genotypes were evaluated for 10 traits.The joint analysis showed that the interactions were significative for the most traits. The significance of the rust effect allowed us to identify the genotypes in which the losses were nonsignificant. We observed that ASR affected two stages of plant development. However, information about ASR losses quantified by the rust reaction rate (RRR) enabled the researchers to select lines that could be used in breeding programs aiming towards ASR tolerance. We found three lines that were superior to one of the cultivar checks. Furthermore, cluster analysis for RRR was useful in establishing the most promising groups of vegetable soybean genotypes for use in hybridization aiming to expand the genetic base for vegetable soybeans and integrate new genetic resources of vegetable soybean in the Brazilian genetic pool to ensure genetic gain.

show abstract

Section: Discussionmentioning

confidence: 78%

Impact of Asian soybean rust on vegetable soybean, considering two stages of development

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Sporulation occurred on all genotypes. Classification of the susceptibility of genotypes against rust disease was influenced by the intensity of uredospore sporulation and assessment of periodical severity (Araujo and Vello, 2010), as conducted in the present study. Apart from genotypes, other factors influenced the disease progress were environmental factors such as relative humidity of leaves (85-95%) and canopy temperature (21-24 o C) as investigated by Del Ponte and Esker (2008).…”

Section: Response Of Soybean Against Rust Diseasementioning

confidence: 97%

Changes of Phenolic Contents and Antioxidant Activity in Soybean Seeds Harvested from Phakopsora pachyrhizi Infected Crops

2018

View full text Add to dashboard Cite

Asian soybean rust caused by Phakopsora pachyrhizi is one of the most destructive foliar diseases on soybean. Severe infection of this disease causes early defoliation and reduces the yield. To determine the response of soybean genotypes to this disease and the changes of metabolites in seeds, a greenhouse study was conducted using eight Indonesian soybean cultivars, i.e. Malabar, Wilis, Ringgit, Pangrango, Argomulyo, Grobogan, Dena 1, and Dena 2. The experiment was arranged in a randomized completely block design and repeated three times. The soybean crops were inoculated with the pathogen and another set was not inoculated. Infection of P. pachyrhizi reduced fresh biomass, seed weight per plant, and weight of 100 seeds. However, total flavonoid contents in seeds increased from 12 to 50% in all infected genotypes. The increase of daidzein from 27 to 67% in seeds was observed, except for Malabar and Argomulyo . The increase of genistein was genotypic dependence. The increase of total phenolic contents as well as antioxidant activity was also depending on the genotypes. P. pachyrhizi could be one of the biotic elicitors to increase total flavonoid contents in soybean seeds. Dena 1 less suffered from the rust infection as represented by the least pustule number, less reduction in seed weight and weight of 100 seeds. Secondary metabolites particularly phenolics and isoflavones in seeds of this cultivar increased significantly after the rust infection. This cultivar could be considered as an alternative tolerant genotype where cultivated area is favorable for soybean rust infection.

show abstract

“…The use of ASR genetic resistant cultivars is one of the most effective long-term, convenient and cost-effective strategies for disease control (Araújo & Vello, 2010;Melo et al, 2015). It is based on modifications in the fungus reproductive capacity, particularly regarding sporulation, which affects the progress of the disease due to the reduction of produced spores (Godoy et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Chemical Control of Asian Soybean Rust as a Function of Cultivar, Row Spacing and Spray Bar Support Systems

Hoffmann¹,

Roehrig

Boller

et al. 2019

Eng. Agríc.

View full text Add to dashboard Cite

Product deposition and foliar surface cover are highly impacting factors on the efficiency of foliar fungicides applied to soybean cultivars, due to their low mobility, with side effects on Asian soybean rust (ASR) control. Spray bar support systems, such as the air curtain (Vortex ® ) and the use of nozzles along the bar (Dropleg ® ), stand out as an alternative to obtain a better distribution of fungicide throughout the plant. In this study, two spray bar support systems (Vortex ® and Dropleg ® ) were, therefore, evaluated and compared with the conventional spraying method based on the biological efficacy in ASR control. In order to do this, two harvests, with three spacing between rows and two cultivars were employed. Vortex ® and Dropleg ® spray bar support mechanisms do not effectively contribute to the optimization of Asian soybean rust control or to the grain crop yield, regardless of cultivar and row spacing. Decreasing the row spacing did not influence the level of control of Asian soybean rust, as the highest grain yield was obtained with the smallest spacing. The cultivar with genetic resistance to Asian rust showed lower levels of this disease, thus, greater control against the use of fungicides.

show abstract

Characterization of soybean genotypes for Asian soybean rust reaction

Cited by 11 publications

References 19 publications

Impact of Asian soybean rust on vegetable soybean, considering two stages of development

Impact of Asian soybean rust on vegetable soybean, considering two stages of development

Changes of Phenolic Contents and Antioxidant Activity in Soybean Seeds Harvested from Phakopsora pachyrhizi Infected Crops

Chemical Control of Asian Soybean Rust as a Function of Cultivar, Row Spacing and Spray Bar Support Systems

Contact Info

Product

Resources

About