Soil coring at multiple field environments can directly quantify variation in deep root traits to select wheat genotypes for breeding

Wasson, Anton; Rebetzke, G. J.; Kirkegaard, John A.; Christopher, Jack; Richards, R. A.; Watt, Michelle

doi:10.1093/jxb/eru250

Cited by 137 publications

(127 citation statements)

References 63 publications

(74 reference statements)

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“…Kell (2011) pointed to the unexploited potential of breeding for deeper rooted crops to substantially improve resource uptake efficiency in deep rooted cropping systems. Deeper root systems can be achieved either by cultivar selection (Wasson et al 2014), tillage system (Pietola 2005) or crop stand establishment (Sharratt and McWilliams 2005).…”

Section: Soil Subsystemmentioning

confidence: 99%

Management of crop water under drought: a review

Bodner

Nakhforoosh

Kaul

2015

Agron. Sustain. Dev.

431

234

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Drought is a predominant cause of low yields worldwide. There is an urgent need for more water efficient cropping systems facing large water consumption of irrigated agriculture and high unproductive losses via runoff and evaporation. Identification of yield-limiting constraints in the plant-soil-atmosphere continuum are the key to improved management of plant water stress. Crop ecology provides a systematic approach for this purpose integrating soil hydrology and plant physiology into the context of crop production. We review main climate, soil and plant properties and processes that determine yield in different water-limited environments. From this analysis, management measures for cropping systems under specific drought conditions are derived. Major findings from literature analysis are as follows. (1) Unproductive water losses such as evaporation and runoff increase from continental in-season rainfall climates to storage-dependent winter rainfall climates. Highest losses occur under tropical residual moisture regimes with short intense rainy season. (2) Sites with a climatic dry season require adaptation via phenology and water saving to ensure stable yields. Intermittent droughts can be buffered via the root system, which is still largely underutilised for better stress resistance. (3) At short-term better management options such as mulching and date of seeding allow to adjust cropping systems to site constraints. Adapted cultivars can improve the synchronisation between crop water demand and soil supply. At long term, soil hydraulic and plant physiological constraints can be overcome by changing tillage systems and breeding new varieties with higher stress resistance. (4) Interactions between plant and soil, particularly in the rhizosphere, are a way towards better crop water supply. Targeted management of such plant-soil interactions is still at infancy.We conclude that understanding site-specific stress hydrology is imperative to select the most efficient measures to mitigate stress. Major progress in future can be expected from crop ecology focussing on the management of complex plant (root)-soil interactions.

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Section: Soil Subsystemmentioning

confidence: 99%

Management of crop water under drought: a review

Bodner

Nakhforoosh

Kaul

2015

Agron. Sustain. Dev.

431

234

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“…hill plots), this method allows for phenotyping deep rooted crop varieties Wasson et al (2014) Rhizo-lysimetry (E. H. Graham Centre for Agricultural Innovation, Australia)…”

Section: Salient Features Referencementioning

confidence: 99%

Accelerating genetic gains in legumes for the development of prosperous smallholder agriculture: integrating genomics, phenotyping, systems modelling and agronomy

Varshney

Thudi

Pandey

et al. 2018

Journal of Experimental Botany

101

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Grain legumes form an important component of the human diet, provide feed for livestock, and replenish soil fertility through biological nitrogen fixation. Globally, the demand for food legumes is increasing as they complement cereals in protein requirements and possess a high percentage of digestible protein. Climate change has enhanced the frequency and intensity of drought stress, posing serious production constraints, especially in rainfed regions where most legumes are produced. Genetic improvement of legumes, like other crops, is mostly based on pedigree and performance-based selection over the past half century. To achieve faster genetic gains in legumes in rainfed conditions, this review proposes the integration of modern genomics approaches, high throughput phenomics, and simulation modelling in support of crop improvement that leads to improved varieties that perform with appropriate agronomy. Selection intensity, generation interval, and improved operational efficiencies in breeding are expected to further enhance the genetic gain in experimental plots. Improved seed access to farmers, combined with appropriate agronomic packages in farmers' fields, will deliver higher genetic gains. Enhanced genetic gains, including not only productivity but also nutritional and market traits, will increase the profitability of farming and the availability of affordable nutritious food especially in developing countries.

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“…3). High-throughput soil coring (Wasson et al, 2014), root crown excavation (Das et al, 2015), and minirhizotron analysis (Maeght et al, 2013) are common ways in which roots are studied in the field, but each provides limited information relative to the actual root structure. Thus, there remains a lack of a coherent view of root phenotypes and their genetic and environmental conditioning (Topp et al, 2016).…”

Section: Plant Root Phenotypingmentioning

confidence: 99%

The quest for understanding phenotypic variation via integrated approaches in the field environment

et al. 2016

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Soil coring at multiple field environments can directly quantify variation in deep root traits to select wheat genotypes for breeding

Abstract: SummaryVariation in deep root traits among wheat genotypes were identified in the field using high-throughput soil coring. Some weakly significant relationships were found between deep root traits and above-ground surrogates.

Cited by 137 publications

References 63 publications

Management of crop water under drought: a review

Management of crop water under drought: a review

Accelerating genetic gains in legumes for the development of prosperous smallholder agriculture: integrating genomics, phenotyping, systems modelling and agronomy

The quest for understanding phenotypic variation via integrated approaches in the field environment

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