Phenotypic and genotypic analysis of drought-resistance traits for development of rice cultivars adapted to rainfed environments

Kamoshita, Akihiko; Babu, R. Chandra; Boopathi, N. Manikanda; Fukai, S.

doi:10.1016/j.fcr.2008.06.010

Cited by 287 publications

(201 citation statements)

References 143 publications

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“…The development of cultivars tolerant to water stress can be a solution. However, the development of drought-tolerant cultivars has been slow for upland rice and this reflects the lack of a specific method for screening the large number of genotypes required in breeding for drought (Kamoshita et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Evapotranspiration and grain yield of upland rice as affected by water deficit

Guimarães

Stone

Silva

2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TTo achieve an accurate phenotyping for drought tolerance, it is important to control water stress levels and timing. This study aimed to determine water use by upland rice plants during periods of irrigation withholding and its relationship with grain yield in order to increase the efficiency of this phenotyping. Two experiments were carried out in a randomized block design in which six water treatments (irrigation withholding for periods of 2, 4, 6, 8, 10 and 12 days) were compared, with four replicates. In the first experiment, treatments were applied at the R3 stage (panicle exsertion) and, in the second, at the R5 stage (beginning of grain filling). The amount of water evapotranspired was determined by the difference between the soil water storage at the beginning and at the end of irrigation withholding periods, from the surface to 80-cm depth. Evapotranspiration of upland rice from R3 stage was higher compared to that observed from R5 stage, when subjected to similar irrigation withholding periods in both growth stages. Rice grain yield is more sensitive to irrigation withholding imposed from R5 stage than from R3 stage.Evapotranspiração e produtividade do arroz de terras altas afetadas pela deficiência hídrica R E S U M O Para se obter fenotipagem acurada para tolerância à deficiência hídrica, é importante controlar o nível de estresse hídrico e a época de sua aplicação. Este trabalho objetivou determinar o uso de água pelas plantas de arroz de terras altas durante períodos de supressão da irrigação e sua relação com a produtividade de grãos, para aumentar a eficácia desta fenotipagem. Foram conduzidos dois experimentos no delineamento de blocos ao acaso e comparados seis tratamentos hídricos (supressão da irrigação por períodos de 2, 4, 6, 8, 10 e 12 dias) com quatro repetições. No primeiro experimento os tratamentos foram aplicados no estádio R3 (emissão das panículas) e no segundo, no estádio R5 (início do enchimento de grãos). A água evapotranspirada foi determinada pela diferença entre o armazenamento de água no solo no início e no fim dos períodos de supressão da irrigação, da superfície até 80 cm de profundidade. A evapotranspiração do arroz no estádio R3 foi mais alta comparada com a observada no estádio R5, quando submetida a período similar de supressão da irrigação em ambos os estádios. A produtividade do arroz foi mais sensível à supressão da irrigação imposta a partir do estádio R5 do que do estádio R3.

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Section: Introductionmentioning

confidence: 99%

Evapotranspiration and grain yield of upland rice as affected by water deficit

Guimarães

Stone

Silva

2016

Rev. bras. eng. agríc. ambient.

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“…Progress in mapping QTLs for secondary traits associated with drought resistance has been extensively reviewed Kamoshita et al, 2008), but MAS for such QTLs has not been successfully used to improve yield under drought stress in rice. Two recent reports indicated that QTLs with large effects on yield under drought stress may not be rare.…”

Section: Critical Research Issuesmentioning

confidence: 99%

Drought Resistance Improvement in Rice: An Integrated Genetic and Resource Management Strategy

Serraj

McNally

Slamet‐Loedin

et al. 2011

Plant Production Science

214

119

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Drought is the major constraint to rice production in rainfed areas across Asia and subSaharan Africa. In the context of current and predicted water scarcity, increasing irrigation is generally not a viable option for alleviating drought problems in rainfed rice-growing systems. It is therefore critical that genetic management strategies for drought focus on maximum extraction of available soil moisture and its effi cient use in crop establishment and growth to maximize biomass and yield. Extensive genetic variation for drought resistance exists in rice germplasm. However, the current challenge is to decipher the complexities of drought resistance in rice and exploit all available genetic resources to produce rice varieties combining drought adaptation with high yield potential, quality, and resistance to biotic stresses. The strategy described here aims at developing a pipeline for elite breeding lines and hybrids that can be integrated with efficient management practices and delivered to rice farmers. This involves the development of high-throughput, highprecision phenotyping systems to allow genes for yield components under stress to be effi ciently mapped and their effects assessed on a range of drought-related traits, and then moving the most promising genes into widely grown rice mega-varieties, while scaling up gene detection and delivery for use in marker-aided breeding.

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“…Similarly, numerous traits including primary, secondary, and integrative drought-resistance traits exist, whose significance needs to be identified through precise phenotyping and be validated for intervention towards crop improvement for attainment of drought tolerance. 3,5,8 The molecular scrutiny of some of these traits is highly recommended. Hence the deployment of Figure 1.…”

Section: How To Unravel the Complexity Of Drought Stressmentioning

confidence: 99%

“…The adaptive strategies revolve around certain key attributory physiological traits. 5 Analysis of adaptive mechanisms of plants will contribute to the knowledge, the requirement for targeted crop improvement toward drought resistance. The complex responses to drought, from perception to ultimate physiological changes, need to be considered at a global systems biology level to examine the multiple interactive components.…”

Section: How To Unravel the Complexity Of Drought Stressmentioning

confidence: 99%

“…[6][7] Since drought tolerance is a complex trait, for targeted crop improvement, an understanding of the traits linked to plant water relations and cell tolerance to drought assumes significance and integrative traits are being used in high throughput phenotyping. 5,8 A few critical traits related to water relations such as water mining and water conservation determining water use efficiency (WUE) and cellular tolerance (CT) to desiccation are considered to be decisive for drought adaptation. The efficiency of the system to combat stress effects relies on how best the water relations are maintained either by mining more available soil water or by conserving water or both, along with various CT mechanisms.…”

Section: How To Unravel the Complexity Of Drought Stressmentioning

confidence: 99%

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Emerging tools, concepts and ideas to track the modulator genes underlying plant drought adaptive traits: An overview

Nataraja

2016

Plant Signaling & Behavior

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Crop vulnerability to multiple abiotic stresses is increasing at an alarming rate in the current global climate change scenario, especially drought. Crop improvement for adaptive adjustments to accomplish stress tolerance requires a comprehensive understanding of the key contributory processes. This requires the identification and careful analysis of the critical morpho-physiological plant attributes and their genetic control. In this review we try to discuss the crucial traits underlying drought tolerance and the various modes followed to understand their molecular level regulation. Plant stress biology is progressing into new dimensions and a conscious attempt has been made to traverse through the various approaches and checkpoints that would be relevant to tackle drought stress limitations for sustainable crop production.

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Phenotypic and genotypic analysis of drought-resistance traits for development of rice cultivars adapted to rainfed environments

Cited by 287 publications

References 143 publications

Evapotranspiration and grain yield of upland rice as affected by water deficit

Evapotranspiration and grain yield of upland rice as affected by water deficit

Drought Resistance Improvement in Rice: An Integrated Genetic and Resource Management Strategy

Emerging tools, concepts and ideas to track the modulator genes underlying plant drought adaptive traits: An overview

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