Sustainable Rice Yield in Water-Short Drought-Prone Environments: Conventional and Molecular Approaches

Swamy, B. P. Mallikarjuna; Kumar, Arvind

doi:10.5772/30696

Cited by 8 publications

(2 citation statements)

References 58 publications

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“…The rice cultivars with high drought tolerance are the most promising source of genes that can be used in the development of drought tolerant or resistant varieties with appreciable nutritional value and yield. Drought tolerance research on rice are being extensively carried out at the International Rice Research Institute (IRRI), Philippines over decades, using traditional drought-tolerant donors and modern high-yielding varieties for mapping population development in controlled and drought conditions, and to identify major QTLs associated with grain yield under drought stress (qDTYs) (Swamy and Kumar, 2012). For instance, qDTY 1.1 (Vikram et al, 2011), qDTY 9.1 (Swamy et al, 2013), qDTY 12.1 (Bernier et al, 2007), qDTY 2.1 (Venuprasad et al, 2009), are some of the major and highly effective QTLs for grain yield under drought conditions in rice.…”

Section: Efforts In Molecular Breeding and Droughttolerant Ricementioning

confidence: 99%

Improving drought tolerance in rice: Ensuring food security through multi‐dimensional approaches

Khan

Palakolanu

Chopra

et al. 2020

Physiologia Plantarum

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Drought has been highly prevalent around the world especially in Sub-Saharan Africa and South-East Asian countries. Consistent climatic instabilities and unpredictable rainfall patterns are further worsening the situation. Rice is a C 3 staple cereal and an important food crop for the majority of the world's population and drought stress is one of the major growth retarding threats for rice that slashes down grain quality and yield. Drought deteriorates rice productivity and induces various acclimation responses that aids in stress mitigation. However, the complexity of traits associated with drought tolerance has made the understanding of drought stress-induced responses in rice a challenging process. An integrative understanding based on physiological adaptations, omics, transgenic and molecular breeding approaches successively backed up to developing drought stress-tolerant rice. The review represents a step forward to develop drought-resilient rice plants by exploiting the knowledge that collaborates with omics-based developments with integrative efforts to ensure the compilation of all the possible strategies undertaken to develop drought stresstolerant rice. | INTRODUCTIONClimatic fluctuations in recent decades have been escalating the frequency and extremity of calamities in many parts of the world. More than 83% of the detrimental effects caused by drought occur in the agricultural sector that leads to crop loss and limited productivity, affecting food supplies and livelihood of people and has emerged as the most serious famines inducing factor across the globe (FAO, 2018). Rice is one of the major cereals and its consumption comprises over 27% of total cereal utilisation with an output of 738.2 million tons globally (FAO, 2016). Rice is a paddy field crop with more water requirement for growth and thus drought stress is considered as the major inimical that hinders rice growth, productivity and yield (Mumtaz et al., 2020).Drought stress detrimentally affects rice production by deteriorating everything from seed germination to the reproductive stages

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Section: Efforts In Molecular Breeding and Droughttolerant Ricementioning

confidence: 99%

Improving drought tolerance in rice: Ensuring food security through multi‐dimensional approaches

Khan

Palakolanu

Chopra

et al. 2020

Physiologia Plantarum

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“…"Hence, the selection of varieties under water stress conditions through rapid and uniform germination is crucial during germination and early seedling establishment" [12]. "Therefore, germination and seedling growth traits and their response to water stress can be useful for the selection of drought-tolerance varieties" [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Upland Rice Response to Water Stress Using Polyethylene Glycol (PEG -6000) at Germination and Early Seedling Stage

Pope,

Opile,

Ngode

et al. 2024

AJRCS

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Water stress is one of the most important crop growth limiting factors which leads to low crop productivity and yield instability. Water stress affects crop growth and development, especially during the germination and seedling period. The experiment was conducted in the growth chamber at the seed physiology laboratory of the Department of Seed, Crop and Horticultural Sciences, University of Eldoret to evaluate sixteen upland rice varieties to water stress tolerance at germination and early seedling growth stage. These varieties were tested against four levels of water stress imposed by Polyethylene glycol 6000 (PEG - 6000) at 0%, 5%,10% and 15% concentration. The lay out of the experiment was complete randomized design (CRD) with three replications. Osmotic stress induced by PEG levels significantly (P<.001) reduced plant growth parameters. The result showed that the germination percentage, germination index, Relative seedling height (%), seedling dry weight, Seedling fresh weight, Seedling length, seedling vigor index and mean germination time of all tested rice varieties were found decreasing trends with increasing the levels of PEG from 0 to 15% concentration levels. Among all the sixteen varieties, NERICA rice varieties followed by MWUR, White rice, Kpatawee, and Komboka had an outstanding performed in terms of germination percentage, germination index, seedling height, seedling dry weight, root length and relative dry weight under water induced stress by using PEG concentration levels compared to other varieties. Therefore, these varieties could be useful in breeding programs and can be cultivated in arid and semi-arid environment or where water shortage is a regular constraint.

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Growing more with less: Breeding and developing drought resilient soybean to improve food security

Dubey

Kumar

Abd_Allah

et al. 2019

Ecological Indicators

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Sustainable Rice Yield in Water-Short Drought-Prone Environments: Conventional and Molecular Approaches

Cited by 8 publications

References 58 publications

Improving drought tolerance in rice: Ensuring food security through multi‐dimensional approaches

Improving drought tolerance in rice: Ensuring food security through multi‐dimensional approaches

Evaluation of Upland Rice Response to Water Stress Using Polyethylene Glycol (PEG -6000) at Germination and Early Seedling Stage

Growing more with less: Breeding and developing drought resilient soybean to improve food security

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