Stay-green: a potentiality in plant breeding

Luche, Henrique de Souza; Silva, José Antônio Gonzalez da; Maia, Luciano Carlos da; Oliveira, Antônio Costa de

doi:10.1590/0103-8478cr20140662

Cited by 20 publications

(19 citation statements)

References 33 publications

(26 reference statements)

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“…Larger A Max helps in increasing intercepted solar radiation and photosynthesis, considered as important traits for high yield potential 18,32 . The S G is another important trait which helps increasing grain yield under both water-limited and irrigated condition by delaying leaf senescence and increasing plant capacity to maintain active photosynthetic tissues longer during grain filling 44,45 . Larger number of grains per ear, greater average grain weight and high yield were reported for different crop cultivars, including wheat, with the improved stay green trait 46,47 .…”

Section: Resultsmentioning

confidence: 99%

Assessing yield gap in high productive countries by designing wheat ideotypes

Senapati

Semenov

2019

Sci Rep

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Designing crop ideotypes in silico is a powerful tool to explore the crop yield potential and yield gap. We defined yield gap as the difference between yield potential of a crop ideotype optimized under local environment and yield of an existing cultivar under optimal management. Wheat ideotypes were designed for the current climate using the Sirius model for both water-limited and irrigated conditions in two high wheat-productive countries viz. the United Kingdom (UK) and New Zealand (NZ) with the objective of estimating yield gap. The mean ideotype yields of 15.0–19.0 t ha −1 were achieved in water-limited conditions in the UK and NZ, whereas 15.6–19.5 t ha −1 under irrigated conditions. Substantial yield gaps were found in both water-limited, 28–31% (4–6 t ha −1 ), and irrigated conditions, 30–32% (5–6 t ha −1 ) in the UK and NZ. Both yield potential (25–27%) and yield gap (32–38%) were greater in NZ than the UK. Ideotype design is generic and could apply globally for estimating yield gap. Despite wheat breeding efforts, the considerable yield gap still potentially exists in high productive countries such as the UK and NZ. To accelerate breeding, wheat ideotypes can provide the key traits for wheat improvement and closing the yield gap.

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Section: Resultsmentioning

confidence: 99%

Assessing yield gap in high productive countries by designing wheat ideotypes

Senapati

Semenov

2019

Sci Rep

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“…Claire . Greater LAI leads to greater intercepted radiation and photosynthesis, whereas improved S G is an important trait for delaying leaf secession, maintaining the green leaf tissue longer after anthesis for photosynthesis, and increasing biomass, HI and grain yield under both water-limited and potential conditions ( Christopher et al, 2016 ; Foulkes et al, 2007 ; Luche et al, 2015 ; Richards, 2006 ; Semenov and Stratonovitch, 2013 ). Improved grain filling duration is another important trait for raising yield potentials of both ideotypes.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, reduced A Max could help to avoid drought stress by reducing transpiration and root water uptake. Delaying leaf senescence after anthesis is a possible strategy to increase grain yield by extending the duration of leaf senescence and maintaining the green leaf area longer: the so-called ‘stay green’ trait ( S G ) ( Christopher et al, 2016 ; Luche et al, 2015 ; Silva et al, 2001 ).…”

Section: Methodsmentioning

confidence: 99%

Raising genetic yield potential in high productive countries: Designing wheat ideotypes under climate change

Senapati

Brown

Semenov

2019

Agricultural and Forest Meteorology

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Graphical abstract Study sites and simulated grain yield of local winter wheat cv . Claire in the baseline- ( CL Base ) and 2050-climate ( HadGEM2 , RCP8.5 ) ( CL 2050 ), and wheat ideotypes designed for raising genetic yield potentials under 2050-climate in water-limited ( IW 2050 ) and potential ( IP 2050 ) conditions. The box plots show the 5-, 25-, 50-, 75- and 95-percentiles including mean. UK: ED - Edinburgh, LE- Leeds, RR-Rothamsted; NZ: GO-Gore, LI-Lincoln, PU-Pukekohe.

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“…Recently, the stay green (SG) trait has been identified as an important component in the genetic improvement of several crops to promote stress tolerance and yield improvement [9]. In maize, this is associated with delayed canopy senescence compared to standard genotypes, which implies a longer period of photosynthetic activity and a longer N retention in the leaves during grain filling, but also lower kernel N concentrations, which might result in lower grain yield [10].…”

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confidence: 99%

Towards Remote Estimation of Radiation Use Efficiency in Maize Using UAV-Based Low-Cost Camera Imagery

Tewes

Schellberg

2018

Agronomy

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Radiation Use Efficiency (RUE) defines the productivity with which absorbed photosynthetically active radiation (APAR) is converted to plant biomass. Readily used in crop growth models to predict dry matter accumulation, RUE is commonly determined by elaborate static sensor measurements in the field. Different definitions are used, based on total absorbed PAR (RUE total ) or PAR absorbed by the photosynthetically active leaf tissue only (RUE green ). Previous studies have shown that the fraction of PAR absorbed (fAPAR), which supports the assessment of RUE, can be reliably estimated via remote sensing (RS), but unfortunately at spatial resolutions too coarse for experimental agriculture. UAV-based RS offers the possibility to cover plant reflectance at very high spatial and temporal resolution, possibly covering several experimental plots in little time. We investigated if (a) UAV-based low-cost camera imagery allowed estimating RUEs in different experimental plots where maize was cultivated in the growing season of 2016, (b) those values were different from the ones previously reported in literature and (c) there was a difference between RUE total and RUE green . We determined fractional cover and canopy reflectance based on the RS imagery. Our study found that RUE total ranges between 4.05 and 4.59, and RUE green between 4.11 and 4.65. These values are higher than those published in other research articles, but not outside the range of plausibility. The difference between RUE total and RUE green was minimal, possibly due to prolonged canopy greenness induced by the stay-green trait of the cultivar grown. The procedure presented here makes time-consuming APAR measurements for determining RUE especially in large experiments superfluous.

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Stay-green: a potentiality in plant breeding

Abstract: Looking at the new demands of the global agricultural

Cited by 20 publications

References 33 publications

Assessing yield gap in high productive countries by designing wheat ideotypes

Assessing yield gap in high productive countries by designing wheat ideotypes

Raising genetic yield potential in high productive countries: Designing wheat ideotypes under climate change

Towards Remote Estimation of Radiation Use Efficiency in Maize Using UAV-Based Low-Cost Camera Imagery

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