Enhancing Abiotic Stress Tolerance in Cereals Through Breeding and Transgenic Interventions

Dwivedi, Sangam L.; Upadhyaya, Hari D.; Subudhi, Prasanta K.; Gehring, Chris; Bajic, Vladimir B.; Ortíz, Rodomiro

doi:10.1002/9780470535486.ch2

Cited by 21 publications

(20 citation statements)

References 340 publications

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“…Sorghum is more drought‐tolerant than any other cereal crop and 80% of sorghum production in the world is under dryland conditions (Assefa et al, 2010). Nevertheless, the crop suffers large grain yield and biomass losses caused by drought (Craufurd and Peacock, 1993; Assefa et al, 2010; Dwivedi et al, 2010; Tari et al, 2013). Post‐flowering drought stress is the most critical constraint, causing substantial losses to grain and stover yields in cereals, including sorghum, worldwide (Assefa et al, 2010; Dwivedi et al, 2010; Tari et al, 2013).…”

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confidence: 99%

Post‐Flowering Drought Tolerance Using Managed Stress Trials, Adjustment to Flowering, and Mini Core Collection in Sorghum

et al. 2017

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Sorghum [Sorghum bicolor (L.) Moench] crop in the semiarid tropics often suffers from post‐flowering drought stress, which causes substantial losses in grain yield and stover quality. This research was aimed at studying the yield response of sorghum mini core accessions to post‐flowering drought stress to identify drought‐tolerant sources for sorghum improvement. Mini core accessions were grouped based on days to 50% flowering (extra early, early, medium, late, and extra late) and evaluated in two post‐rainy seasons under managed drought stress and optimally irrigated conditions. Drought tolerance index (DTI), as a standard residual after removing the known contributory effects of flowering time and grain yield under optimum irrigation (yield potential) from the grain yield under drought, was used to segregate the genotypic responses to drought stress. The residual (or restricted) maximum likelihood analysis of data revealed significant genotypic variance (σ2g) for days to 50% flowering, grain yield, and DTI (except in the extra late flowering group), in both the seasons and significant genotype × environment interactions for DTI in extra early to late flowering groups. On the basis of DTI, seven accessions, i.e., ‘IS 14779’, ‘IS 23891’, ‘IS 31714’, ‘IS 4515’, ‘IS 5094’, ‘IS 9108’, and ‘IS 15466’, were identified as drought tolerant and five accessions were sensitive to drought in both of the post‐rainy seasons. The tolerant accessions belonging to durra, caudatum, or durra‐caudatum races were of diverse geographical origins, and most yielded at par with or greater than the extensively grown cultivar ‘IS 33844’. These accessions can be employed to investigate the physiological and molecular basis of drought adaptation and to breed for drought tolerance in sorghum.

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confidence: 99%

Post‐Flowering Drought Tolerance Using Managed Stress Trials, Adjustment to Flowering, and Mini Core Collection in Sorghum

et al. 2017

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“…IR28 and IR58 show osmotic stress tolerance but are sensitive to sodium stress, suggesting that different resistance mechanisms are involved in osmotic stress and salt stress. IRAT109 (Nemoto et al, 1998;Bañoc et al, 2000a;Luo, 2010), Azucena (Dwivedi et al, 2010), and Dular (De Datta et al, 1975;Kobata et al, 1996;Bañoc et al, 2000a) were reported to be drought-resistant cultivars in previous studies. Among the 59 cultivars used in this study, the S/C ratio of the dry weight of shoots and roots were ranked 35th and 19th in IRAT109, 24th and 33rd in Azucena, and 42nd and 33rd in Dular, respectively.…”

Section: Resultsmentioning

confidence: 94%

“…Additionally, IR28, Azucena, IR64, IRAT109, and Dular were added. IRAT109 (Bañoc et al, 2000b;Luo, 2010;Nemoto et al, 1998), Azucena (Dwivedi et al, 2010), and Dular (De Datta et al, 1975;Kobata et al, 1996;Bañoc et al, 2000a) are drought-resistant cultivars and IR64 is highly sensitive to drought stress (Lafitte et al, 2007). IR28 is a salt-sensitive cultivar (Igarashi et al, 1997;Dionisio-Sese and Tobita, 1998) (Table 1).…”

Section: Plant Culturementioning

confidence: 99%

Genotypic Variation in Osmotic Stress Tolerance Among Rice Cultivars and Its Association with L-Type Lateral Root Development

Toyofuku

Matsunami

Ogawa

2015

Plant Production Science

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“…Nutrient solution popularly known as Yoshida medium (Yoshida et al 1976 ) , supplemented with different concentrations of NaCl, is commonly used for salt tolerance screening in rice. A number of cultivars, landraces, and advanced breeding lines such as Pokkali, Nonabokra, SR26B, Damodar, Cheriviruppu, CSR11, Getu, FL378, FL 478, IR 51500-AC17, IR 51500-AC11-1, IR 4595-4-1-13, IR 51491-AC10 have been identifi ed as useful sources for salt tolerance in rice (Dwivedi et al 2010 ) . Using these lines as donors, few salt-tolerant lines have been released Ismail et al 2007 ) .…”

Section: Effect Of Salinity On Crop Plantsmentioning

confidence: 99%

Approaches to Increasing Salt Tolerance in Crop Plants

Karan

Subudhi

2011

Abiotic Stress Responses in Plants

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Soil salinity is widely recognized as a major threat to global food security. Salinity and other abiotic stresses, which are expected to be more frequent in future due to disturbances in global climate, pose a serious challenge for plant scientists to ensure food supply for the growing world population. Several approaches have been advocated to address the salinity problem, but the most logical solution to maintain crop productivity in salt-affected areas is to enhance salt tolerance of crop plants. Due to the genetic and physiological complexity associated with salt tolerance, efforts to breed salt-tolerant plants have met with limited success. Although progress has been made in deciphering the genetic basis of salt tolerance, sustained efforts are needed to systematically dissect and utilize the natural variability in the available germplasm for improving crop adaptation in saline environments using modern genomics tools. Wide range of variability for salt tolerance in wild relatives, cultivars of major fi eld crops, and halophytes offers bright prospect for discovery of superior salt-tolerant alleles for crop improvement. With an enhanced understanding of molecular mechanisms and the associated genes for component traits of salt tolerance, it would be possible to breed salt-tolerant plants using an integrated approach involving conventional breeding, physiological analysis, markerassisted selection, and transgenic technology.

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Enhancing Abiotic Stress Tolerance in Cereals Through Breeding and Transgenic Interventions

Cited by 21 publications

References 340 publications

Post‐Flowering Drought Tolerance Using Managed Stress Trials, Adjustment to Flowering, and Mini Core Collection in Sorghum

Post‐Flowering Drought Tolerance Using Managed Stress Trials, Adjustment to Flowering, and Mini Core Collection in Sorghum

Genotypic Variation in Osmotic Stress Tolerance Among Rice Cultivars and Its Association with L-Type Lateral Root Development

Approaches to Increasing Salt Tolerance in Crop Plants

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