Improving yield potential of tropical rice: Achieved levels and perspectives through improved ideotypes

Dingkuhn, Michaël; Laza, M.; Kumar, Uttam; Mendez, Kharla S.; Collard, B. C. Y.; Jagadish, Krishna S.V.; Singh, Rakesh Kumar; Padolina, Thelma; Malabayabas, Myrna; Torres, Edgar; Rebolledo, María Camila; Manneh, Baboucarr; Sow, Abdoulaye

doi:10.1016/j.fcr.2015.05.025

Cited by 78 publications

(69 citation statements)

References 49 publications

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“…Crop growth rate of rice as influenced by nitrogen level over the growing periods. [29]. In this context, application of higher rates of nitrogen can minimize curtail leaf area loss and endure high canopy photosynthetic rates to maintain better crop growth.…”

Section: Growthmentioning

confidence: 99%

Growth, Yield and Nitrogen Use Efficiency of New Rice Variety under Variable Nitrogen Rates

Haque¹,

Haque²

2016

AJPS

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Section: Growthmentioning

confidence: 99%

Growth, Yield and Nitrogen Use Efficiency of New Rice Variety under Variable Nitrogen Rates

Haque¹,

Haque²

2016

AJPS

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“…We performed a global sensitivity analysis involving parameters dealing with canopy architecture and photosynthetic efficiency, resistance/tolerance to biotic and abiotic stressors and grain quality in five contrasting rice production areas, under current weather and climate change scenarios to identify future rice ideotypes. These parameters are related to traits currently regarded as priority for breeding (Dingkuhn et al., ; Peng, Khush, Virk, Tang, & Zou, ), but a comparative evaluation of their relative importance under different conditions was not available. The analysis was performed only on parameters with a close link to traits breeders are working on.…”

Section: Discussionmentioning

confidence: 99%

Surfing parameter hyperspaces under climate change scenarios to design future rice ideotypes

Paleari

Movedi

Cappelli

et al. 2017

Global Change Biology

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Growing food crops to meet global demand and the search for more sustainable cropping systems are increasing the need for new cultivars in key production areas. This study presents the identification of rice traits putatively producing the largest yield benefits in five areas that markedly differ in terms of environmental conditions in the Philippines, India, China, Japan and Italy. The ecophysiological model WARM and sensitivity analysis techniques were used to evaluate phenotypic traits involved with light interception, photosynthetic efficiency, tolerance to abiotic stressors, resistance to fungal pathogens and grain quality. The analysis involved only model parameters that have a close relationship with phenotypic traits breeders are working on, to increase the in vivo feasibility of selected ideotypes. Current climate and future projections were considered, in the light of the resources required by breeding programs and of the role of weather variables in the identification of promising traits. Results suggest that breeding for traits involved with disease resistance, and tolerance to cold- and heat-induced spikelet sterility could provide benefits similar to those obtained from the improvement of traits involved with canopy structure and photosynthetic efficiency. In contrast, potential benefits deriving from improved grain quality traits are restricted by weather variability and markedly affected by G × E interactions. For this reason, district-specific ideotypes were identified using a new index accounting for both their productivity and feasibility.

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“…Although more research will be required for a complete understanding of which traits are desirable for a specific environment and drought pattern, existing research suggests that improved root characteristics, shorter cycles (i.e., drought escape), osmotic adjustment as well as quicker and larger assimilate translocation from stems to panicles would likely be desirable traits to improve drought responses (Dingkuhn et al, 2015;Fukai & Cooper, 1995). Although more research will be required for a complete understanding of which traits are desirable for a specific environment and drought pattern, existing research suggests that improved root characteristics, shorter cycles (i.e., drought escape), osmotic adjustment as well as quicker and larger assimilate translocation from stems to panicles would likely be desirable traits to improve drought responses (Dingkuhn et al, 2015;Fukai & Cooper, 1995).…”

Section: Breeding Implications Of Changes In Environment Groups Andmentioning

confidence: 99%

“…While there may be several potential avenues to increase rice yield, crop breeding is arguably one of the most promising strategies toward such aim (Dingkuhn et al, 2015;Ramirez-Villegas, Watson, & Challinor, 2015). Higher rice productivity has been attained in irrigated environments by improving yield potential while reducing crop duration, whereas less success has been achieved in drought-prone environments such as upland and rainfed cropping systems (Kamoshita, Babu, Boopathi, & Fukai, 2008;.…”

mentioning

confidence: 99%

Breeding implications of drought stress under future climate for upland rice in Brazil

Ramírez-Villegas

Heinemann

Castro

et al. 2018

Global Change Biology

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Rice is the most important food crop in the developing world. For rice production systems to address the challenges of increasing demand and climate change, potential and on-farm yield increases must be increased. Breeding is one of the main strategies toward such aim. Here, we hypothesize that climatic and atmospheric changes for the upland rice growing period in central Brazil are likely to alter environment groupings and drought stress patterns by 2050, leading to changing breeding targets during the 21st century. As a result of changes in drought stress frequency and intensity, we found reductions in productivity in the range of 200-600 kg/ha (up to 20%) and reductions in yield stability throughout virtually the entire upland rice growing area (except for the southeast). In the face of these changes, our crop simulation analysis suggests that the current strategy of the breeding program, which aims at achieving wide adaptation, should be adjusted. Based on the results for current and future climates, a weighted selection strategy for the three environmental groups that characterize the region is suggested. For the highly favorable environment (HFE, 36%-41% growing area, depending on RCP), selection should be done under both stress-free and terminal stress conditions; for the favorable environment (FE, 27%-40%), selection should aim at testing under reproductive and terminal stress, and for the least favorable environment (LFE, 23%-27%), selection should be conducted for response to reproductive stress only and for the joint occurrence of reproductive and terminal stress. Even though there are differences in timing, it is noteworthy that stress levels are similar across environments, with 40%-60% of crop water demand unsatisfied. Efficient crop improvement targeted toward adaptive traits for drought tolerance will enhance upland rice crop system resilience under climate change.

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Improving yield potential of tropical rice: Achieved levels and perspectives through improved ideotypes

Cited by 78 publications

References 49 publications

Growth, Yield and Nitrogen Use Efficiency of New Rice Variety under Variable Nitrogen Rates

Growth, Yield and Nitrogen Use Efficiency of New Rice Variety under Variable Nitrogen Rates

Surfing parameter hyperspaces under climate change scenarios to design future rice ideotypes

Breeding implications of drought stress under future climate for upland rice in Brazil

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