Breeding high-yielding drought-tolerant rice: genetic variations and conventional and molecular approaches

Kumar, Arvind; Dixit, Shalabh; Ram, T.; Yadaw, Ram Baran; Mishra, K. K.; Mandal, Nimai Prasad

doi:10.1093/jxb/eru363

Cited by 342 publications

(339 citation statements)

References 39 publications

(71 reference statements)

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“…Selective breeding still plays a major role in the production of new varieties but the emergence of modern plant biotechnology has led to a more targeted approach to increasing crop yields. Traits of agricultural importance successfully introduced to plants using recombinant DNA technology include herbicide resistance (Comai et al 1985), drought resistance (Kumar et al 2014), pest resistance (Bates et al 2005), pathogen resistance (Brunner et al 2011;Horvath et al 2012;Jones et al 2014), abiotic stress resistance (Jaglo-Ottosen et al 1998), enhanced photosynthetic capacity (Ku et al 2001), im-proved nitrogen use efficiency (Yanagisawa et al 2004), and added nutritional value (Ye et al 2000). However, although plants hold a unique promise for bioproduction at the gigatonne scale, efforts in genetic engineering of plants are lagging compared with microbial systems (Antunes et al 2009(Antunes et al , 2011Liu et al 2011Liu et al , 2013Koschmann et al 2012;Wend et al 2013;Zurcher et al 2013;Fethe et al 2014;Mül-ler et al 2014).…”

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confidence: 99%

Synthetic Botany

Boehm

Pollak

Purswani³

et al. 2017

Cold Spring Harb Perspect Biol

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Plants are attractive platforms for synthetic biology and metabolic engineering. Plants' modular and plastic body plans, capacity for photosynthesis, extensive secondary metabolism, and agronomic systems for large-scale production make them ideal targets for genetic reprogramming. However, efforts in this area have been constrained by slow growth, long life cycles, the requirement for specialized facilities, a paucity of efficient tools for genetic manipulation, and the complexity of multicellularity. There is a need for better experimental and theoretical frameworks to understand the way genetic networks, cellular populations, and tissue-wide physical processes interact at different scales. We highlight new approaches to the DNA-based manipulation of plants and the use of advanced quantitative imaging techniques in simple plant models such as Marchantia polymorpha. These offer the prospects of improved understanding of plant dynamics and new approaches to rational engineering of plant traits.

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confidence: 99%

Synthetic Botany

Boehm

Pollak

Purswani³

et al. 2017

Cold Spring Harb Perspect Biol

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“…Such comparative analysis should target key morphological, physiological, anatomical, and agronomic traits throughout the crop growth cycle, as water deficit stress occurs at both early (vegetative stage) and late (reproductive stage) seasons in rice (Pandey et al, 2007). Extensive research efforts are currently ongoing to reduce the impact of water deficit stress during the reproductive stage in rice (Venuprasad et al, 2008;Verulkar et al, 2010;Vikram et al, 2011;Kumar et al, 2014) and in wheat (Olivares-Villegas et al, 2007;Lopes and Reynolds, 2010;Pinto et al, 2010). Therefore, our study focused on stress during the vegetative stage to identify key checkpoints that determine whole-plant responses of representative rice cultivars adapted to lowland, upland/aerobic, or water deficit conditions and of wheat cultivars with moderate to high water deficit tolerance.…”

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Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

et al. 2015

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District of Columbia 20005 (P.S.B.)Water scarcity and the increasing severity of water deficit stress are major challenges to sustaining irrigated rice (Oryza sativa) production. Despite the technologies developed to reduce the water requirement, rice growth is seriously constrained under water deficit stress compared with other dryland cereals such as wheat (Triticum aestivum). We exposed rice cultivars with contrasting responses to water deficit stress and wheat cultivars well adapted to water-limited conditions to the same moisture stress during vegetative growth to unravel the whole-plant (shoot and root morphology) and organ/tissue (root anatomy) responses. Wheat cultivars followed a water-conserving strategy by reducing specific leaf area and developing thicker roots and moderate tillering. In contrast, rice 'IR64' and 'Apo' adopted a rapid water acquisition strategy through thinner roots under water deficit stress. Root diameter, stele and xylem diameter, and xylem number were more responsive and varied with different positions along the nodal root under water deficit stress in wheat, whereas they were relatively conserved in rice cultivars. Increased metaxylem diameter and lower metaxylem number near the root tips and exactly the opposite phenomena at the rootshoot junction facilitated the efficient use of available soil moisture in wheat. Tolerant rice 'Nagina 22' had an advantage in root morphological and anatomical attributes over cultivars IR64 and Apo but lacked plasticity, unlike wheat cultivars exposed to water deficit stress. The key traits determining the adaptation of wheat to dryland conditions have been summarized and discussed.Among cereals, rice (Oryza sativa) and wheat (Triticum aestivum) are the most important staple food crops, and they belong to the family Poaceae. These two cereals share a common ancestor and diverged about 65 million years ago (Sorrells et al., 2003). Rice eventually developed strong adaptation potential for fully flooded conditions across tropical to temperate environments, while wheat became well adapted to aerobic conditions mostly restricted to temperate environments. Rice, with a semiaquatic behavior, consumes about 30% of the total fresh water available for agricultural crops worldwide, which equates to a 2-to 3-fold higher consumption than other cereals such as wheat and maize (Zea mays; Peng et al., 2006). Despite a significantly lower water requirement, the potential yield of wheat in a favorable environment (9 tons ha 21 ) is comparable with the yield of fully flooded rice (9 tons ha 21 ) in the dry season at the International Rice Research Institute (IRRI; Fischer and Edmeades, 2010). Hence, rice records very low water productivity compared with wheat and other dryland cereals. Because of growing concerns about water scarcity and the increased frequency and magnitude of water deficit stress events under current and future climates, increasing or even sustaining rice yield under fully flooded conditions is highly challenging. To minimize the total water requ...

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“…Although many QTLs for grain yield under drought stress was reported by Kumar et al, (2014) whereas, this is the first report using Assam rice cultivars in elite genetic background.…”

Section: Qtl Analysismentioning

confidence: 83%

Mapping of QTLs for Grain Yield and its Component Traits under Drought Stress in Elite Rice Variety of Assam

Verma¹,

Chetia²,

Dey³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Breeding high-yielding drought-tolerant rice: genetic variations and conventional and molecular approaches

Abstract: SummaryThis study discusses improvement of popular rice varieties under drought through the identification and marker-assisted introgression of drought yield QTLs without any adverse effect on yield under normal conditions.

Cited by 342 publications

References 39 publications

Synthetic Botany

Synthetic Botany

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

Mapping of QTLs for Grain Yield and its Component Traits under Drought Stress in Elite Rice Variety of Assam

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