Genetic control of soybean (Glycine max) yield in the absence and presence of the Asian rust fungus (Phakopsora pachyrhizi)

Ribeiro, Aliny Simony; Toledo, J.F.; Arias, Carlos A.; Godoy, C. V.; Soares, R. M.; Moreira, J. U. V.; Pierozzi, Pedro Henrique Braga; Gonçalves‐Vidigal, Maria Celeste; Oliveira, Marcelo Fernandes de

doi:10.1590/s1415-47572008000100018

Cited by 12 publications

(6 citation statements)

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“…In self-pollinated crops such as soybeans, it is expected to find a predominance of additive effects for most traits in early generations (Spehar 1999;Mebrahtu and Devine 2008). Tolerance to rust is expected to have a polygenic inheritance and a predominance of additive effects (Ribeiro et al 2008), which is similar to those found in the present study. Dominant effects were important mainly for cycle-related traits, since few genes with major effect govern these traits, generally with dominant alleles for precocity (Suh et al 2000;Watanabe et al 2012).…”

Section: Discussionsupporting

confidence: 85%

Uni and multivariate approaches for diallel analysis in early generation trials for soybean tolerance to rust

et al. 2019

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Due to the high impact of Asian soybean rust (SBR) in Brazilian croplands, several studies have been conducted in order to maintain or increase the grain yield gain over years in the presence of the pathogen. The aim of this study was to define a breeding strategy applying uni and multivariate approaches for diallel analyzes in early generation trials and contrasting disease conditions. Thus, assessing genetic parameters to identify traits related to greater tolerance to soybean rust. Deploying a North Carolina design II scheme (4 elite commercial cultivars × 10 rusttolerant experimental lines), we obtained 40 F 2 crosses that were evaluated in a randomized complete block design with 4 replicates. The crosses were conducted in two environments, contrasting only for the fungicide management (with and without rust control), enabling the estimation of the rust impact on 11 traits, divided

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Section: Discussionsupporting

confidence: 85%

Uni and multivariate approaches for diallel analysis in early generation trials for soybean tolerance to rust

et al. 2019

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“…Soybean (Glycine max) is one of the most important crops in some countries, such as China (Chen et al 2006) and Brazil (Ribeiro et al 2008). Using somatic hybridization method, the stable somatic descendents S111-9 between salt-tolerant Glycine cyrtoloba and salt-sensitive G. max were selected.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic response of salt-tolerant and sensitive soybean varieties

Lu¹,

Cao²,

Feng³

et al. 2009

Photosynt.

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The physiological response of two soybean varieties to salt stress was examined. The results showed that salt stress induced a significantly (p<0.01) lower decrease of the net photosynthetic rate (P N ) in salt-tolerant S111-9 than in saltsensitive Glycine max. P N decrease was positively related to the decrease of stomatal conductance (g s ) and intercellular CO 2 concentration (C i ) in S111-9, while with g s in G. max. a threshold of relative water content (RWC) was found, above which a slight decrease in RWC lead to a sharp reduction in g s . The photochemical quenching (q P ), the efficiency of open PSII centers(Φ PSII )and the Rubisco activity (RA) significantly decreased with increasing salinity level in G. max. The maximum PSII quantum yield(F v /F m )decreased significantly under the highest NaCl in both varieties. The higher reduction of RA in G. max was attributed to Rubisco content, which was mainly regulated at LSU expression level rather than at rbcL transcript level. These findings led us to conclude that the salt-induced reduction in P N was mainly due g s and RA for S111-9 and G. max, respectively.

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“…crops. Early infection may cause premature defoliation, therefore affecting the number of intact pods, reducing pod numbers, yield and seed sizes (Kumudini et al, 2008;Ribeiro et al, 2008Ribeiro et al, , 2009. Significant yield loss up to 80% occurs in heavily infected crops especially in susceptible genotypes (Twizeyimana et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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

2018

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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.

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Genetic control of soybean (Glycine max) yield in the absence and presence of the Asian rust fungus (Phakopsora pachyrhizi)

Cited by 12 publications

References 5 publications

Uni and multivariate approaches for diallel analysis in early generation trials for soybean tolerance to rust

Uni and multivariate approaches for diallel analysis in early generation trials for soybean tolerance to rust

Photosynthetic response of salt-tolerant and sensitive soybean varieties

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

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