Drought tolerance mechanisms for yield responses to pre-flowering drought stress of peanut genotypes with different drought tolerant levels

Jongrungklang, Nuntawoot; Toomsan, B.; Vorasoot, Nimitr; Jogloy, Sanun; Boote, Kenneth J.; Hoogenboom, Gerrit; Patanothai, A.

doi:10.1016/j.fcr.2012.12.017

Cited by 30 publications

(29 citation statements)

References 22 publications

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“…Greater root proliferation at deeper soil layers means greater support for the seed filling and greater grain yield formation with improved harvest indices under drought (Comas et al, 2013). Also, it has been shown that genotypes with higher preflowering root-length density in deeper soil layers possess enhanced drought tolerance with higher pod yield and harvest index under drought ( Jongrungklang et al, 2013). In chickpea and peanut (Arachis hypogaea L.), the development of a larger proportion of the root structure at depth has been shown to contribute to higher grain yield ( Jongrungklang et al, 2011;Zaman-Allah et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Assessing Genetic Variability for Root Traits and Identification of Trait‐Specific Germplasm in Chickpea Reference Set

et al. 2015

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Chickpea (Cicer arietinum L.) is a major grain legume cultivated largely on residual soil moisture in the arid and semiarid regions of the world. Terminal drought stress is one of the major causes of yield loss, and a deep root system has been recognized as one of the most important traits for enhancing drought adaptability. To diversify the current genetic base of root traits, the present study explored the variation for root traits in the reference set of chickpea (n = 300) germplasm. Genetic variability for root traits at 35 d after sowing was assessed using a polyvinyl chloride (PVC) cylinder culture system in two postrainy seasons. Largest genetic variability was observed for dry weights of shoot (broad‐sense heritability [h2] = 0.69–0.74) and root (h2 = 0.52–0.70). For root‐length density (h2 = 0.42–0.43) and root/total‐plant dry‐weight ratio (h2 = 0.32–0.54), h2 values were moderate but the variation was large, indicating scope for selection. The performance of the reference set accessions was identified for each of key traits. Accessions with the best root‐length densities along with root and shoot dry weights were found to originate from the Mediterranean region and western Asia emphasizing the importance of whole collection from these regions for superior root traits. This study identified 23 new accessions for widening the parental base in further drought tolerance breeding efforts and identified superior traits in already adapted genetic backgrounds.

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Section: Discussionmentioning

confidence: 99%

Assessing Genetic Variability for Root Traits and Identification of Trait‐Specific Germplasm in Chickpea Reference Set

et al. 2015

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“…Plants were initially maintained under ideal irrigation conditions as determined using soil water potential sensors. The plants were subjected to intermittent drought stress when more than 50 % of all plants were flowering (stage R5 according to the CIAT fenological scale, Fernández et al 1983) as previous work has shown that at this stage tolerant genotypes can be more easily distinguished (Jongrungklang et al 2013). At the same time another group of plants was maintained under irrigated conditions until the end of the growing cycle.…”

Section: Greenhouse Experimentsmentioning

confidence: 99%

Biochemical indicators of drought tolerance in the common bean (Phaseolus vulgaris L.)

et al. 2016

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The common bean (Phaseolus vulgaris L.) is an important crop that is often planted in areas that suffer from low water availability, leading to significant reductions in productivity. The breeding of genotypes better able to tolerate such conditions requires the efficient incorporation of resources present in germplasm banks. To this end, we investigated the responses of thirty bean genotypes to intermittent drought stress, with the aim of identifying biochemical markers for drought tolerance. The genotypes analyzed presented significant variability in both productivity and levels of soluble sugars, starch and amino acids under both irrigated and drought conditions. Moreover, we observed changes in the levels of these components under drought stress, providing information on the responses of the bean plants to this condition. Correlation analysis indicated a lack of relationship between components of the stem and productivity. On the other hand, levels of several components of the grain, including starch, total soluble sugars and amino acids were strongly positively correlated with productivity under drought and irrigated conditions, making these components potentially useful biochemical markers for the selection of genotypes for breeding programs. Principal components analysis also indicated the presence of a relationship between biochemical composition and productivity, but reinforced the fact that multiple mechanisms are responsible for explaining the differences in productivity between tolerant and susceptible genotypes.

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“…Jongrungklang et al. () reported that stomatal conductance and photosynthesis under drought stress contributed to drought tolerance. Peanut genotypes which maintained stomatal conductance under drought stress were indicated by higher transpiration.…”

Section: Discussionmentioning

confidence: 99%

“…The peanut genotypes were selected for this experiment because of their reported differential responses to early‐season and mid‐season droughts (Jongrungklang et al., , ). ICGV 98305 and ICGV 98324 are drought‐resistant lines from the International Crops Research Institute for the Semi‐Arid Tropics (ICRISAT).…”

Section: Methodsmentioning

confidence: 99%

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Root distribution patterns of peanut genotypes with different drought resistance levels under early‐season drought stress

Thangthong

Jogloy

Jongrungklang

et al. 2017

J Agronomy Crop Science

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Drought severely limits crop yield of peanut. Yet cultivars with enhanced root development enable the exploration of a greater volume of soil for water and nutrients, helping the plant survive. Root distribution patterns of three genotypes (ICGV 98305, ICGV 98324 and Tifton‐8) were compared when grown in well‐watered rhizoboxes and when grown in rhizoboxes where an early‐season drought was imposed using rain‐exclusion shelters. The treatments were arranged in a completely randomized design with three replications, and the experiment was conducted during two seasons at the Field Crop Research Station of Khon Kaen University, in Khon Kaen, Thailand. The root system of ICGV 98305, when grown under drought, had a significantly higher root length in the 30–110 cm deep soil layers and less roots in the 0–30 cm soil layers when under drought than when grown under well‐watered conditions. Roots of Tifton‐8 had the largest reductions in root length in upper soil layer and reduced in most soil layers. Tifton‐8 grown under drought was smaller than under well‐watered control for all root traits, showing negative response to drought. The peanut genotypes with high root traits in deeper soil layer under early‐season drought might contribute to drought avoidance mechanism.

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Drought tolerance mechanisms for yield responses to pre-flowering drought stress of peanut genotypes with different drought tolerant levels

Cited by 30 publications

References 22 publications

Assessing Genetic Variability for Root Traits and Identification of Trait‐Specific Germplasm in Chickpea Reference Set

Assessing Genetic Variability for Root Traits and Identification of Trait‐Specific Germplasm in Chickpea Reference Set

Biochemical indicators of drought tolerance in the common bean (Phaseolus vulgaris L.)

Root distribution patterns of peanut genotypes with different drought resistance levels under early‐season drought stress

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