Multi‐trait stability index: A tool for simultaneous selection of soya bean genotypes in drought and saline stress

Zuffo, Alan Mário; Steiner, Fábio; Aguilera, Jorge González; Teodoro, Paulo Eduardo; Teodoro, Larissa Pereira Ribeiro; Busch, Aécio

doi:10.1111/jac.12409

Cited by 77 publications

(94 citation statements)

References 24 publications

(24 reference statements)

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“…This suitable method allowed to identify the efficient and meaningful “multi-trait classifiers” of the root systems [ 28 ] and the detection of the functional root traits and mechanisms, which operate independently or jointly. For example, the principal component analysis (PCA) permitted to identify the root ideotypes in drought stress for peanut landraces [ 55 ], sugar beet genotypes [ 56 ], bean landraces [ 57 ] and soybean genotypes [ 58 ]. Conversely, the sparse PLS-DA, a supervised technique, made efficient the trait selection and dimension reduction simultaneously by imposing sparsity to the solution [ 59 ], making it a novel approach to investigate high-dimensional and redundant root data.…”

Section: Discussionmentioning

confidence: 99%

Single and Combined Abiotic Stress in Maize Root Morphology

Vescio

Abenavoli

Sorgonà

2020

Plants

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Plants are continually exposed to multiple stresses, which co-occur in nature, and the net effects are frequently more nonadditive (i.e., synergistic or antagonistic), suggesting “unique” responses with respect to that of the individual stress. Further, plant stress responses are not uniform, showing a high spatial and temporal variability among and along the different organs. In this respect, the present work investigated the morphological responses of different root types (seminal, seminal lateral, primary and primary lateral) of maize plants exposed to single (drought and heat) and combined stress (drought + heat). Data were evaluated by a specific root image analysis system (WinRHIZO) and analyzed by uni- and multivariate statistical analyses. The results indicated that primary roots and their laterals were the types more sensitive to the single and combined stresses, while the seminal laterals specifically responded to the combined only. Further, antagonistic and synergistic effects were observed for the specific traits in the primary and their laterals and in the seminal lateral roots in response to the combined stress. These results suggested that the maize root system modified specific root types and traits to deal with different stressful environmental conditions, highlighting that the adaptation strategy to the combined stress may be different from that of the individual ones. The knowledge of “unique or shared” responses of plants to multiple stress can be utilized to develop varieties with broad-spectrum stress tolerance.

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Section: Discussionmentioning

confidence: 99%

Single and Combined Abiotic Stress in Maize Root Morphology

Vescio

Abenavoli

Sorgonà

2020

Plants

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“…As a result, this genotype may be cultivated under saturation limiting conditions, which contributes to the advance of farming areas to marginal lands (Mueller, Berger, Schittenhelm, Stever‐Schoo, & Dauber, 2020; Wright & Wimberly, 2013). Given the growing demand for food and energy, extending the farming areas to marginal lands and obtaining a higher crop yield in unfavourable environments in is essential to increase global food security (Zuffo et al., 2020).…”

Section: Resultsmentioning

confidence: 99%

Physiological response and earliness of soybean genotypes to soil base saturation conditions

Andrade

Patinni

Pantaleão

et al. 2020

J Agronomy Crop Science

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Low base saturation (V) is one of the major abiotic stresses in the Brazilian Cerrado. Given this scenario, it is important to evaluate different physiological responses of genotypes in environments with and without liming aiming at select both liming responsive and low‐saturation tolerant genotypes. The hypothesis of this study is that contrasting V conditions provide changes in physiological performance of soybean genotypes. Thus, our objective was to select soybean genotypes in environments with recommended and low V. Two field experiments were carried in randomized block design with three replicates and 10 F3 soybean genotypes (P1, P2, P3, P4, P5, P6, P7, P8, P9 and P10). In the first experiment, genotypes were evaluated without V correction (V = 30%), while in the second experiment, a liming was performed three months before to raise V to 60%. The traits evaluated were as follows: calcium and magnesium contents, days for maturation, transpiration, net photosynthesis, stomatal conductance and internal CO2 concentration. Our findings indicate that the physiological performance of soybean genotypes depends on the saturation condition. The P9 genotype obtained the best physiological performance under recommended V and can be used to obtain F3:4 lines physiologically responsive to soil correction. The P5 genotype obtained the best physiological performance at low V and can be used to obtain F3:4 lines aiming at a higher tolerance to low saturation. Considering that the Brazilian soils, especially in the Cerrado, are mostly poorly fertile, our study provide crucial information for soybean breeding programmes aiming at selecting genotypes tolerant to limiting environmental conditions.

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“…Before starting the experiment, an initial evaluation was made for determining the traits water content, thousand seed weight and germination percentage, as previously described in the Official Rules for Seed Analysis (Brasil, 2009). The main agronomic traits of the soya bean genotypes used in this study can be seen in Zuffo et al (2020).…”

Section: Plant Materials and Stress Treatmentsmentioning

confidence: 99%

How does water and salt stress affect the germination and initial growth of Brazilian soya bean cultivars?

Zuffo

Steiner

Sousa

et al. 2020

J Agronomy Crop Science

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The effects of water and salt stress on rate of germination and seedling growth were investigated under laboratory conditions in 46 soya bean genotypes from Central-West region of Brazil to verify how these stresses may limit crop establishment during the initial growth stage and also to identify the most tolerant genotypes to drought and salinity. Mild water and salt stresses were imposed by seed exposure to-0.20 MPa iso-osmotic solutions with polyethylene glycol-PEG 6000 (119.57 g/L) or NaCl (2.357 g/L) for 12 days at 25°C. The germination percentage, seedling length and seedling dry matter were measured, and then, salt or drought tolerance indexes were calculated.

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Multi‐trait stability index: A tool for simultaneous selection of soya bean genotypes in drought and saline stress

Cited by 77 publications

References 24 publications

Single and Combined Abiotic Stress in Maize Root Morphology

Single and Combined Abiotic Stress in Maize Root Morphology

Physiological response and earliness of soybean genotypes to soil base saturation conditions

How does water and salt stress affect the germination and initial growth of Brazilian soya bean cultivars?

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