Characterising root trait variability in chickpea (<i>Cicer arietinum</i>L.) germplasm

Chen, Yinglong; Ghanem, Michel Edmond; Siddique, Kadambot H. M.

doi:10.1093/jxb/erw368

Cited by 64 publications

(91 citation statements)

References 53 publications

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“…The large genotypic variation in root morphology observed in the 100 chickpea genotypes when grown under low‐P conditions in our study, is consistent with the results of Chen et al . (), who found large variation in rooting patterns among 270 chickpea genotypes grown in semi‐hydroponics system with optimum supply of all nutrients. Likewise, significant genotypic differences in root length and root hair length were found among 10 chickpea genotypes (Gahoonia et al ., ).…”

Section: Discussionmentioning

confidence: 99%

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The carboxylate‐releasing phosphorus‐mobilizing strategy can be proxied by foliar manganese concentration in a large set of chickpea germplasm under low phosphorus supply

et al. 2018

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Summary Root foraging and root physiology such as exudation of carboxylates into the rhizosphere are important strategies for plant phosphorus (P) acquisition. We used 100 chickpea (Cicer arietinum) genotypes with diverse genetic backgrounds to study the relative roles of root morphology and physiology in P acquisition. Plants were grown in pots in a low‐P sterilized river sand supplied with 10 μg P g−1 soil as FePO4, a poorly soluble form of P. There was a large genotypic variation in root morphology (total root length, root surface area, mean root diameter, specific root length and root hair length), and root physiology (rhizosheath pH, carboxylates and acid phosphatase activity). Shoot P content was correlated with total root length, root surface area and total carboxylates per plant, particularly malonate. A positive correlation was found between mature leaf manganese (Mn) concentration and carboxylate amount in rhizosheath relative to root DW. This is the first study to demonstrate that the mature leaf Mn concentration can be used as an easily measurable proxy for the assessment of belowground carboxylate‐releasing processes in a range of chickpea genotypes grown under low‐P, and therefore offers an important breeding trait, with potential application in other crops.

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Section: Discussionmentioning

confidence: 99%

“…Information on these genotypes, including country of origin, biological status (advanced cultivar, breeding material and landrace) and seed type (desi, kabuli or pea‐shaped) are described in Chen et al . () and Atieno et al . ().…”

Section: Methodsmentioning

confidence: 97%

The carboxylate‐releasing phosphorus‐mobilizing strategy can be proxied by foliar manganese concentration in a large set of chickpea germplasm under low phosphorus supply

et al. 2018

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“…It has been observed in several crop species that large diversity exists for root characteristics through the use of different root phenotyping methods (Nakamoto et al, 1991;Manschadi et al, 2006Manschadi et al, , 2008Chen et al, 2016). These authors came to the conclusions that the plasticity of root architecture increases adaptability, which in turn should improve productivity when the best fit is deployed for specific soils and moisture conditions.…”

Section: Field Variation For Grain Size Based On Differences In Root mentioning

confidence: 99%

Root System Architecture and Its Association with Yield under Different Water Regimes in Durum Wheat

et al. 2018

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Durum wheat (Triticum durum Desf.) is a major cereal crop grown globally, but its production is often hindered by droughts. Breeding for adapted root system architecture should provide a strategic solution for better capturing moisture. The aim of this research was to adapt low‐cost and high‐throughput methods for phenotyping root architecture and exploring the genetic variability among 25 durum genotypes. Two protocols were used: the “clear pot” for seminal root and the “pasta strainer” to evaluate mature roots. Analysis of variance revealed significant segregation for all measured traits with strong genetic control. Shallow and deep root classes were determined with different methods and then tested in yield trials at five locations with different water regimes. Simple trait measurements did not correlate to any of the traits consistently across field sites. Multitrait classification instead identified significant superiority of deep‐rooted genotypes with 16 to 35% larger grains in environments with limited moisture, but 9 to 24% inferior in the drip irrigated site. Combined multitrait classification identified a 28 to 42% advantage in grain yield for the class with deeper roots at two environments where moisture was limited. Further discrimination revealed that yield advantage of 37 to 38% under low moisture could be achieved by the deepest root types, but that it also caused a 20 to 40% yield penalty in moisture‐rich environments compared with the shallowest root types. In conclusion, the proposed methodologies enable low‐cost and quick characterization of root behavior in durum wheat with significant distinction of agronomic performance.

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“…This study revealed the important role of root metaxylem in water use efficiency and stomatal conductance during the reproductive stage of plant development and that root metaxylem number was associated with soybean lines that produced high yields under drought stress (Prince et al, ). Root trait phenotyping across a large germplasm collection is important to identify candidate genotypes with suitable root traits for breeding of new varieties through marker‐assisted selection programmes and QTL mapping (Chen et al, ).…”

Section: Legume Genetic Resources Under Environmental Stressesmentioning

confidence: 99%

Legume genetic resources and transcriptome dynamics under abiotic stress conditions

et al. 2018

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Grain legumes are an important source of nutrition and income for billions of consumers and farmers around the world. However, the low productivity of new legume varieties, due to the limited genetic diversity available for legume breeding programmes and poor policymaker support, combined with an increasingly unpredictable global climate is resulting in a large gap between current yields and the increasing demand for legumes as food. Hence, there is a need for novel approaches to develop new high-yielding legume cultivars that are able to cope with a range of environmental stressors. Next-generation technologies are providing the tools that could enable the more rapid and cost-effective genomic and transcriptomic studies for most major crops, allowing the identification of key functional and regulatory genes involved in abiotic stress resistance. In this review, we provide an overview of the recent achievements regarding abiotic stress resistance in a wide range of legume crops and highlight the transcriptomic and miRNA approaches that have been used. In addition, we critically evaluate the availability and importance of legume genetic resources with desirable abiotic stress resistance traits.

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Characterising root trait variability in chickpea (Cicer arietinumL.) germplasm

Abstract: HighlightLarge variation in root system architecture in chickpea germplasm was identified across 270 genotypes, providing information that can be used in developing genotypes with root traits for improved adaptation to specific environments.

Cited by 64 publications

References 53 publications

The carboxylate‐releasing phosphorus‐mobilizing strategy can be proxied by foliar manganese concentration in a large set of chickpea germplasm under low phosphorus supply

The carboxylate‐releasing phosphorus‐mobilizing strategy can be proxied by foliar manganese concentration in a large set of chickpea germplasm under low phosphorus supply

Root System Architecture and Its Association with Yield under Different Water Regimes in Durum Wheat

Legume genetic resources and transcriptome dynamics under abiotic stress conditions

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