Molecular approaches for wheat improvement under drought and heat stress

Jain, Neelu; Singh, G. P.; Singh, Premlata; Ramya, P.; Krishna, Hari; Ramya, K. T.; Todkar, Leena; Amasiddha, B.; Krishna, K. R.; Vijay, Priyanka; Jadon, Vasudha; Dutta, Soma; Rai, Neha; Sinha, Nivedita; Prabhu, K. V.

doi:10.5958/0975-6906.2014.00893.1

Cited by 23 publications

(15 citation statements)

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“…Hence, QTL mapping is an important prerequisite for locating the QTLs responsible for the observed phenotypic variation in physiological traits and yield components under moisture stress 4 . The difficulty in phenotyping physiological traits in a large population can be overcome by adopting of normalized difference vegetative index (NDVI), canopy temperature (CT), relative water content (RWC) and chlorophyll content measured by SPAD chlorophyll meter as they are robust and have high potential in screening the genotypes under moisture stress condition 6 . Despite the availability of these advanced tools for phenotyping of physiological traits, so far, only a few studies have been able to report validated QTLs for physiological traits 7 – 9 .…”

Section: Introductionmentioning

confidence: 99%

Mapping genomic regions of moisture deficit stress tolerance using backcross inbred lines in wheat (Triticum aestivum L.)

Puttamadanayaka

Harikrishna

Balaramaiah

et al. 2020

Sci Rep

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Identification of markers associated with major physiological and yield component traits under moisture deficit stress conditions in preferred donor lines paves the way for marker-assisted selection (MAS). In the present study, a set of 183 backcross inbred lines (BILs) derived from the cross HD2733/2*C306 were genotyped using 35K Axiom genotyping array and SSR markers. The multi-trait, multi-location field phenotyping of BILs was done at three locations covering two major wheat growing zones of India, north-western plains zone (NWPZ) and central zone (CZ) under varying moisture regimes. A linkage map was constructed using 705 SNPs and 86 SSR polymorphic markers. A total of 43 genomic regions and QTL × QTL epistatic interactions were identified for 14 physiological and yield component traits, including NDVI, chlorophyll content, CT, CL, PH, GWPS, TGW and GY. Chromosomes 2A, 5D, 5A and 4B harbors greater number of QTLs for these traits. Seven Stable QTLs were identified across environment for DH (QDh.iari_6D), GWPS (QGWPS.iari_5B), PH (QPh.iari_4B-2, QPh.iari_4B-3) and NDVI (QNdvi1.iari_5D, QNdvi3.iari_5A). Nine genomic regions identified carrying major QTLs for CL, NDVI, RWC, FLA, PH, TGW and biomass explaining 10.32–28.35% of the phenotypic variance. The co-segregation of QTLs of physiological traits with yield component traits indicate the pleiotropic effects and their usefulness in the breeding programme. Our findings will be useful in dissecting genetic nature and marker-assisted selection for moisture deficit stress tolerance in wheat.

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Section: Introductionmentioning

confidence: 99%

Mapping genomic regions of moisture deficit stress tolerance using backcross inbred lines in wheat (Triticum aestivum L.)

Puttamadanayaka

Harikrishna

Balaramaiah

et al. 2020

Sci Rep

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“…The progenies derived from these intermatings were superior in performance to their parents as well as the check cultivar HD3043; the promising lines are being subjected to station yield trials. This program is an example of the success of MARS in wheat improvement for drought tolerance [78].…”

Section: Marker-assisted Recurrent Selection (Mars)mentioning

confidence: 99%

“…This program involved ICAR-IARI, New Delhi, India, Chinese Academy of Agricultural Sciences (CAAS), China, and partners from Australia [80]. Under the GCP programme, at ICAR-IARI, New Delhi, attempts were also made to combine QTLs for stress adaptive traits, such as early vigor, SPAD values at vegetative and reproductive stages, NDVI, chlorophyll fluorescence, and flag leaf area, following MARS [78]. Progenies segregating for QTLs for the above traits in the two F 4 base populations were subjected to foreground selection to identify those progenies, which carried desirable combinations of QTLs and excelled in yield performance during multi-location trials.…”

Section: Marker-assisted Recurrent Selection (Mars)mentioning

confidence: 99%

“…However, MABC has only been rarely attempted for the improvement of drought tolerance in wheat on a large scale. For example, under the Generation Challenge Programme funded by CIMMYT, Mexico, and the National Initiative on Climate Resilient Agriculture Project supported by ICAR, India, efforts were made to introgress QTLs for several drought-related traits (canopy temperature, chlorophyll content, stay green habit, NDVI values, days to anthesis, grain yield, and its related traits) into two elite Indian wheat cultivars (HD2733 and GW322) through MABC [78] (for details of QTLs, see Kirigwi et al [46], Pinto et al [24], Kumar et al [53], and Kadam et al [69]). After foreground and background selection (90% recurrent parent), the BC 1 F 2 -and BC 2 F 2 -containing QTLs for drought-related traits and the 90% genome of the recurrent parent genotypes were advanced for seed multiplication.…”

Section: Marker-assisted Backcrossing (Mabc)mentioning

confidence: 99%

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QTL Analysis for Drought Tolerance in Wheat: Present Status and Future Possibilities

2017

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Abstract:In recent years, with climate change, drought stress has been witnessed in many parts of the world. In many irrigated regions also, shortage of water supply allows only limited irrigation. These conditions have an adverse effect on the productivity of many crops including cereals such as wheat. Therefore, genetics of drought/water stress tolerance in different crops has become a priority area of research. This research mainly involves use of quantitative trait locus (QTL) analysis (involving both interval mapping and association mapping) for traits that are related to water-use efficiency. In this article, we briefly review the available literature on QTL analyses in wheat for traits, which respond to drought/water stress. The outlook for future research in this area and the possible approaches for utilizing the available information on genetics of drought tolerance for wheat breeding are also discussed.

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“…When heat-stress tolerance, which has a quantitative hereditary characteristic, is the focus, then MARS seems to be one of the most efficient methods for plant breeding. After using MARS, Jain et al (2014) have described improvements in drought and heat tolerance in wheat, while International Maize and Wheat Improvement Center (http://www. cimmyt.org) have started utilizing this approach in maize, and Spindel et al (2015) have made strong advancements via MARS in rice.…”

Section: Breeding Strategy For Introducing Tolerance To High Temperatmentioning

confidence: 99%

Effective Strategies for Enhancing Tolerance to High-Temperature Stress in Rice during the Reproductive and Ripening Stages

Tayade

Nguyen

et al. 2018

Plant Breed. Biotech.

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Temperatures that extend beyond normal levels of tolerance cause severe stress to plants, especially during the reproductive and grain filling/ripening stages. Heat stress leads to serious yield losses in many crop plants, including rice (Oryza sativa). In view of the current scenario of global climate change, frequent fluctuations and a significant increase in average temperatures will pose challenges to protecting those yields. Therefore, elucidating the molecular mechanisms that make crop plants more tolerant of heat, particularly in organs at the reproductive stage, is of utmost importance. Precise molecular information will be helpful for the manipulation and exploration of relevant genes for use in crop improvement programs. In this review, we highlight recent progress in research on the molecular responses to high temperatures in pollen and seed and provide a perspective on the development of heat tolerance in rice cultivars. The responsible mechanism is a very complex phenomenon that involves several biochemical and physiological changes, molecular responses, and a series of signal transductions. Improving our understanding requires detailed knowledge at various omics levels. Recent technological advancements have accelerated genomics, transcriptomics, and proteomics studies in rice, a model crop plant. Here, we discuss those technological and omics approaches being taken to investigate the heat tolerance mechanism, particularly in rice. In addition, we address the tools being used to identify key genes and QTLs that can then be utilized for molecular breeding and biotechnology.

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Molecular approaches for wheat improvement under drought and heat stress

Cited by 23 publications

References 0 publications

Mapping genomic regions of moisture deficit stress tolerance using backcross inbred lines in wheat (Triticum aestivum L.)

Mapping genomic regions of moisture deficit stress tolerance using backcross inbred lines in wheat (Triticum aestivum L.)

QTL Analysis for Drought Tolerance in Wheat: Present Status and Future Possibilities

Effective Strategies for Enhancing Tolerance to High-Temperature Stress in Rice during the Reproductive and Ripening Stages

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