Modeling spatial and temporal variation of drought in rice production

Hijmans, Robert J.; Serraj, Rachid

doi:10.1142/9789814280013_0002

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…D ROUGHT is a recurrent phenomenon and an important constraint to rainfed rice production. In Asia, where 90% of the total area is under cultivation, 45% is subjected to drought in different intensities and the contribution from such drought‐affected areas to the total rice production is only 25% (Hijmans and Serraj, 2009). Shortfalls in yield in this vast drought‐prone area threaten food security, human health, and livelihood of millions.…”

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Direct Selection for Grain Yield under Moisture Stress in Oryza sativa cv. IR58025B × Oryza meridionalis Population

Gouda¹,

Varma²,

Saikumar³

et al. 2012

Crop Science

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Rice {Oryza sativa L.) is one of the important food crops drastically affected by drought. Considering the low heritability of grain yield under water stress, several secondary traits associated with drought tolerance have been used, but the success achieved in deriving cultivars with high yield potential under stress is less compared to irrigated conditions. Hence, objective of the experiment was to estimate heritability for grain yield under lowland stress and select for grain yield per se using wild species Oryza meridionalis Ng and also to identify physio-morphological traits responsible for withstanding water stress. A population derived from O. sativa cv. IR58025B X O. meridionalis (BC^Fg) was evaluated under control and stress conditions. Variability observed for yield and component traits indicated 0. meridionalis to be a good source of useful alíeles for drought tolerance. Broad-sense heritability {h^) of grain yield under stress, although only 33.1%, was comparable to control 59.4%, indicating direct selection for grain yield per se can be practiced. Twenty high-yielding selected lines and 40 random lines were evaluated under control and stress conditions to estimate selection response. Yield of selected lines outperformed random lines and checks under stress. Furthermore, 10 lines (5 high yielding and 5 low yielding) selected from the population were characterized for root morphological traits. Maximum root length (MRL) and root volume (RV) of selected high-yielding lines recorded maximum compared with checks and low-yielding lines indicating positive influence of drought avoidance root traits on grain yield under stress. Hence, O. meridionalis can be a good source of root traits contributing to stress tolerance and selection for grain yield under stress is an effective strategy in deriving drought tolerant lines in rice.

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confidence: 99%

Direct Selection for Grain Yield under Moisture Stress in Oryza sativa cv. IR58025B × Oryza meridionalis Population

Gouda¹,

Varma²,

Saikumar³

et al. 2012

Crop Science

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“…This is a kind of water stress called drought stress (Salehi-Lisar and Bakhshayeshan-Agdam, 2016). Waterrelated issues are not consistent throughout the years lead to the imbalance in quantity and distribution of rainfall (Hijmans and Serraj, 2009;Khan et al, 2018), however, they occur with expected frequency in a particular area (Serraj et al, 2015). About 42 million ha of rice-producing area faces the problem of drought stress (Yang et al, 2019) and there is a huge gap between the actual (4 t/ha) and potential (10 t/ha) due to the presence of various abiotic stresses (Oladosu et al, 2019).…”

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A critical review on the improvement of drought stress tolerance in rice (Oryza sativa L.)

Rasheed

Hassan

Aamer

et al. 2020

Not Bot Horti Agrobo

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Abiotic stresses are the primary threat to crop production across the globe. Drought stress is primary abiotic stress which is considerably limiting the global rice production and putting the food security at higher risks. Drought tolerance (DT) is a multigene trait which is influenced by various stages of development in rice plant. Tolerance as well as susceptibility of rice to drought stress is carried out by different drought-response genes and other components of stress. Plant researchers have used various methods such as, genetic manipulation and marker-assisted techniques for development of new rice cultivars with improved tolerance to drought stress. The aims of this review are to present recent advancements and illustrate current approaches to breed a robust drought-resistant rice genotypes by using classical breeding and advanced molecular techniques. We also shed light on all available information regarding the role of significant hormones in DT, QTL for drought-related traits, QTL for rice yield, global strategies for the improvement of DT in rice, DT genes, and selection supported by markers.

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“…Particularly for rainfed rice systems, which occupy large production areas in Asia and most of the production areas in Africa and Latin America (Hijmans & Serraj, 2008), concerns have been raised with regard to how rice production systems will be able to sustainably satisfy increasing demand in a context of stagnating potential and on-farm yield, increasing yield gaps and climate change-induced yield reductions Zhao et al, 2016). More specifically, the latest IPCC report showed that, in the absence of adaptation, tropical rice productivity is likely to decrease at a rate between 1.3% and 3.5% per degree of warming (Porter et al, 2014).…”

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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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Modeling spatial and temporal variation of drought in rice production

Cited by 11 publications

References 10 publications

Direct Selection for Grain Yield under Moisture Stress in Oryza sativa cv. IR58025B × Oryza meridionalis Population

Direct Selection for Grain Yield under Moisture Stress in Oryza sativa cv. IR58025B × Oryza meridionalis Population

A critical review on the improvement of drought stress tolerance in rice (Oryza sativa L.)

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

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