Breeding custom‐designed crops for improved drought adaptation

Varshney, Rajeev K.; Barmukh, Rutwik; Roorkiwal, Manish; Qi, Yiping; Kholová, Jana; Tuberosa, Roberto; Reynolds, Matthew; Tardieu, Francois F.; Siddique, Kadambot H.M.

doi:10.1002/ggn2.10052

Cited by 20 publications

(37 citation statements)

References 96 publications

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“…The majority of the agricultural production under rainfed farming depends on residual soil moisture during the growing season. Hence, drought can have a potential calamitous impact on crop yields (Varshney et al ., 2021a). There is a rising need to develop and adopt new crop varieties for improving crop yields in drought‐prone areas across the world, especially in South Asia and sub‐Saharan Africa (Atlin et al ., 2017; Varshney et al ., 2021b).…”

Section: Introductionmentioning

confidence: 99%

“…Although crop yield is a consequence of many plant functions and their interaction with the environment (Cooper et al ., 2021; Tardieu, 2012), it is the ultimate target of crop improvement (Kholova et al ., 2021). Crop yield under drought is constitutively determined by seed weight and the size of lateral organs, including leaf and root (Varshney et al ., 2021a). Thus far, very few QTLs responsible for seed weight and/or organ size have been cloned and characterized in chickpea (Basu et al ., 2019), although many have been identified in the last decade (Barmukh et al ., 2021; Roorkiwal et al ., 2018; Sivasakthi et al ., 2018; Varshney et al ., 2014).…”

Section: Introductionmentioning

confidence: 99%

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Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea

Barmukh

Roorkiwal

Garg

et al. 2022

Plant Biotechnology Journal

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Chickpea production is vulnerable to drought stress. Identifying the genetic components underlying drought adaptation is crucial for enhancing chickpea productivity. Here, we present the fine mapping and characterization of 'QTL-hotspot', a genomic region controlling chickpea growth with positive consequences on crop production under drought. We report that a nonsynonymous substitution in the transcription factor CaTIFY4b regulates seed weight and organ size in chickpea. Ectopic expression of CaTIFY4b in Medicago truncatula enhances root growth under water deficit. Our results suggest that allelic variation in 'QTL-hotspot' improves preanthesis water use, transpiration efficiency, root architecture and canopy development, enabling high-yield performance under terminal drought conditions. Gene expression analysis indicated that CaTIFY4b may regulate organ size under water deficit by modulating the expression of GRF-INTERACTING FACTOR1 (GIF1), a transcriptional co-activator of Growth-Regulating Factors. Taken together, our study offers new insights into the role of CaTIFY4b and on diverse physiological and molecular mechanisms underpinning chickpea growth and production under specific drought scenarios.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea

Barmukh

Roorkiwal

Garg

et al. 2022

Plant Biotechnology Journal

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“…Due to the lack of precise and high-throughput phenotyping for root-related traits, breeding for the advancement of drought tolerance appears to be a difficult task. In the present study, molecular mapping of root-related traits will be helpful for the introgression of the genomic regions associated with root traits into elite cultivars by using genomics-assisted breeding approaches (Varshney et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Usually, drought stress adversely affects the plants through a transient or terminal drought (Li et al, 2018;Varshney et al, 2021). In general, it is a terminal drought that can terminate or reduce the reproductive phase to drastically reduce the crop yield.…”

Section: Introductionmentioning

confidence: 99%

Genetic mapping of QTLs for drought tolerance in chickpea (Cicer arietinum L.)

et al. 2022

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Chickpea yield is severely affected by drought stress, which is a complex quantitative trait regulated by multiple small-effect genes. Identifying genomic regions associated with drought tolerance component traits may increase our understanding of drought tolerance mechanisms and assist in the development of drought-tolerant varieties. Here, a total of 187 F8 recombinant inbred lines (RILs) developed from an interspecific cross between drought-tolerant genotype GPF 2 (Cicer arietinum) and drought-sensitive accession ILWC 292 (C. reticulatum) were evaluated to identify quantitative trait loci (QTLs) associated with drought tolerance component traits. A total of 21 traits, including 12 morpho-physiological traits and nine root-related traits, were studied under rainfed and irrigated conditions. Composite interval mapping identified 31 QTLs at Ludhiana and 23 QTLs at Faridkot locations for morphological and physiological traits, and seven QTLs were identified for root-related traits. QTL analysis identified eight consensus QTLs for six traits and five QTL clusters containing QTLs for multiple traits on linkage groups CaLG04 and CaLG06. The identified major QTLs and genomic regions associated with drought tolerance component traits can be introgressed into elite cultivars using genomics-assisted breeding to enhance drought tolerance in chickpea.

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“…These mechanisms include DT, avoidance, escape, and recovery after drought ( Figure 3 ). Drought avoidance mechanisms include maintaining higher water content in tissue and normal functioning of physiological processes despite low water content in soil ( Luo, 2010 ; Varshney et al, 2021 ). The plant closes its stomata, limits vegetative growth, increases water and nutrient uptake and waxy accumulation.…”

Section: Drought Tolerance Mechanism In Ramiementioning

confidence: 99%

Improving Drought Stress Tolerance in Ramie (Boehmeria nivea L.) Using Molecular Techniques

Rasheed

Jie²,

Nawaz³

et al. 2022

Front. Plant Sci.

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Ramie is one of the most significant fiber crops and contributes to good quality fiber. Drought stress (DS) is one of the most devastating abiotic factors which is accountable for a substantial loss in crop growth and production and disturbing sustainable crop production. DS impairs growth, plant water relation, and nutrient uptake. Ramie has evolved a series of defense responses to cope with DS. There are numerous genes regulating the drought tolerance (DT) mechanism in ramie. The morphological and physiological mechanism of DT is well-studied; however, modified methods would be more effective. The use of novel genome editing tools like clustered regularly interspaced short palindromic repeats (CRISPR) is being used to edit the recessive genes in crops to modify their function. The transgenic approaches are used to develop several drought-tolerant varieties in ramie, and further identification of tolerant genes is needed for an effective breeding plan. Quantitative trait loci (QTLs) mapping, transcription factors (TFs) and speed breeding are highly studied techniques, and these would lead to the development of drought-resilient ramie cultivars. The use of hormones in enhancing crop growth and development under water scarcity circumstances is critical; however, using different concentrations and testing genotypes in changing environments would be helpful to sort the tolerant genotypes. Since plants use various ways to counter DS, investigating mechanisms of DT in plants will lead to improved DT in ramie. This critical review summarized the recent advancements on DT in ramie using novel molecular techniques. This information would help ramie breeders to conduct research studies and develop drought tolerant ramie cultivars.

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Breeding custom‐designed crops for improved drought adaptation

Cited by 20 publications

References 96 publications

Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea

Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea

Genetic mapping of QTLs for drought tolerance in chickpea (Cicer arietinum L.)

Improving Drought Stress Tolerance in Ramie (Boehmeria nivea L.) Using Molecular Techniques

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