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Bhavya MSP, Manju RV, Viji MM, Roy S, Anith KN, Beena R. Impact of biofertilisers on iron homeostasis and grain quality in the rice variety Uma under Elevated CO 2. Front Plant Sci 2023; 14:1144905. [PMID: 37426980 PMCID: PMC10325570 DOI: 10.3389/fpls.2023.1144905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 05/17/2023] [Indexed: 07/11/2023]
Abstract
The diminishing nutritional quality of rice with increasing concentrations of atmospheric CO2 is currently a major global concern. The present study was designed with the objective of assessing the impact of biofertilisers on grain quality and iron homeostasis in rice under elevated CO2. A completely randomised design with four treatments ([KAU, POP (control), POP+Azolla, POP+PGPR, and POP+AMF]), each replicated three times under ambient and elevated CO2 conditions, was followed. The analysed data revealed that yield, grain quality, and iron uptake and translocation were modified in an unfavourable manner under elevated CO2, which was reflected in the lower quality and iron content of the grains. The response of iron homeostasis in the experimental plants to the application of biofertilisers, especially plant-growth-promoting rhizobacteria (PGPR), under elevated CO2 strongly suggests the possibility of utilising them for designing iron management strategies for achieving higher quality in rice.
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Affiliation(s)
- M. S. P. Bhavya
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, India
| | - R. V. Manju
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, India
| | - M. M. Viji
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, India
| | - S. Roy
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, India
| | - K. N. Anith
- Department of Agricultural Microbiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, India
| | - R. Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, India
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Jha UC, Nayyar H, Chattopadhyay A, Beena R, Lone AA, Naik YD, Thudi M, Prasad PVV, Gupta S, Dixit GP, Siddique KHM. Major viral diseases in grain legumes: designing disease resistant legumes from plant breeding and OMICS integration. Front Plant Sci 2023; 14:1183505. [PMID: 37229109 PMCID: PMC10204772 DOI: 10.3389/fpls.2023.1183505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 04/05/2023] [Indexed: 05/27/2023]
Abstract
Grain legumes play a crucial role in human nutrition and as a staple crop for low-income farmers in developing and underdeveloped nations, contributing to overall food security and agroecosystem services. Viral diseases are major biotic stresses that severely challenge global grain legume production. In this review, we discuss how exploring naturally resistant grain legume genotypes within germplasm, landraces, and crop wild relatives could be used as promising, economically viable, and eco-environmentally friendly solution to reduce yield losses. Studies based on Mendelian and classical genetics have enhanced our understanding of key genetic determinants that govern resistance to various viral diseases in grain legumes. Recent advances in molecular marker technology and genomic resources have enabled us to identify genomic regions controlling viral disease resistance in various grain legumes using techniques such as QTL mapping, genome-wide association studies, whole-genome resequencing, pangenome and 'omics' approaches. These comprehensive genomic resources have expedited the adoption of genomics-assisted breeding for developing virus-resistant grain legumes. Concurrently, progress in functional genomics, especially transcriptomics, has helped unravel underlying candidate gene(s) and their roles in viral disease resistance in legumes. This review also examines the progress in genetic engineering-based strategies, including RNA interference, and the potential of synthetic biology techniques, such as synthetic promoters and synthetic transcription factors, for creating viral-resistant grain legumes. It also elaborates on the prospects and limitations of cutting-edge breeding technologies and emerging biotechnological tools (e.g., genomic selection, rapid generation advances, and CRISPR/Cas9-based genome editing tool) in developing virus-disease-resistant grain legumes to ensure global food security.
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Affiliation(s)
- Uday Chand Jha
- Indian Institute of Pulses Research (IIPR), Indian Council of Agricultural Research (ICAR), Kanpur, Uttar Pradesh, India
| | - Harsh Nayyar
- Department of Botany, Panjab University, Chandigarh, India
| | - Anirudha Chattopadhyay
- Department of Plant Pathology, Pulse Research Station, S.D. Agricultural University SK Nagar, SK Nagar, Gujarat, India
| | - Radha Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University (KAU), Thiruvananthapuram, Kerala, India
| | - Ajaz A. Lone
- Dryland Agriculture Research Station, Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST)-Kashmir, Srinagar, India
| | - Yogesh Dashrath Naik
- Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Samatipur, Bihar, India
| | - Mahendar Thudi
- Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Samatipur, Bihar, India
- Shandong Academy of Agricultural Sciences, Jinan, Shandong, China
- Center for Crop Health, University of Southern Queensland, Toowoomba, QLD, Australia
| | | | - Sanjeev Gupta
- Indian Council of Agricultural Research, New Delhi, India
| | - Girish Prasad Dixit
- Indian Institute of Pulses Research (IIPR), Indian Council of Agricultural Research (ICAR), Kanpur, Uttar Pradesh, India
| | - Kadambot H. M. Siddique
- The University of Western Australia (UWA) Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
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Stephen K, Aparna K, Beena R, Sah RP, Jha UC, Behera S. Identification of simple sequence repeat markers linked to heat tolerance in rice using bulked segregant analysis in F 2 population of NERICA-L 44 × Uma. Front Plant Sci 2023; 14:1113838. [PMID: 37051081 PMCID: PMC10084929 DOI: 10.3389/fpls.2023.1113838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/06/2023] [Indexed: 06/19/2023]
Abstract
The damage caused by high temperature is one of the most important abiotic stress affecting rice production. Reproductive stage of rice is highly susceptible to high temperature. The present investigation was undertaken to identify polymorphic microsatellite markers (SSR) associated with heat tolerance. The rice cultivars NERICA- L 44 (heat tolerant) and Uma (heat susceptible) were crossed to generate F1 and F2 populations. The F2 population was subjected to heat stress at >38°C and the 144 F2 plants were evaluated for their tolerance. The results note that the mean of the F2 population was influenced by the tolerant parent with regards to the traits of plant height, membrane stability index, photosynthetic rate, stomatal conductance, evapotranspiration rate, pollen viability, spikelet fertility and 1000 grain weight. Ten each of the extremely susceptible and tolerant plants were selected based on the spikelet fertility percentage. Their DNA was pooled into tolerant and susceptible bulks and Bulked Segregant Analysis (BSA) was carried out using 100 SSR markers to check for polymorphism. The survey revealed a polymorphism of 18% between the parents. RM337, RM10793, RM242, RM5749, RM6100, RM490, RM470, RM473, RM222 and RM556 are some of the prominent markers that were found to be polymorphic between the parents and the bulks. We performed gene annotation and enrichment analysis of identified polymorphic markers. Result revealed that the sequence specific site of that chromosome mostly enriched with biological processes like metabolic pathway, molecular mechanism, and subcellular function. Among that RM337 was newly reported marker for heat tolerance. Expression analysis of two genes corresponds to RM337 revealed that LOP1 (LOC_Os08g01330) was linked to high temperature tolerance in rice. The results demonstrate that BSA using SSR markers is useful in identifying genomic regions that contribute to thermotolerance.
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Affiliation(s)
- K. Stephen
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, India
| | - K. Aparna
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, India
| | - R. Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, India
| | - R. P. Sah
- Crop Improvement Division, Indian Council of Agricultural Research (ICAR)-National Rice Research Institute, Cuttack, India
| | - Uday Chand Jha
- Crop Improvement Division, Indian Institute of Pulses Research, Kanpur, India
| | - Sasmita Behera
- Crop Improvement Division, Indian Council of Agricultural Research (ICAR)-National Rice Research Institute, Cuttack, India
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Stephen K, Beena R, Kiran AG, Shanija S, Saravanan R. Changes in physiological traits and expression of key genes involved in sugar signaling pathway in rice under high temperature stress. 3 Biotech 2022; 12:183. [PMID: 35875179 PMCID: PMC9300813 DOI: 10.1007/s13205-022-03242-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 06/21/2022] [Indexed: 11/29/2022] Open
Abstract
Efficient assimilate partitioning between the source and sink organs to achieve increased grain weight is coordinated by the sugar signaling mechanism. The expression of the genes involved in sugar signaling mainly hexokinases 2 (OsHXK2), Sucrose-nonfermentation1-related protein kinase1 (OsSnRK1), trehalose-6-phosphate synthase 1 (OsTPS1) and target of rapamycin (OsTOR) under high temperature stress was examined in tolerant (NL-44) and susceptible (Vandana) varieties of rice. The photosynthetic rate, stomatal conductance, water-use efficiency, photochemical efficiency (Fv/Fm), quantum yield (ϕPSII), pollen viability, spikelet fertility and 1000 grain weight were significantly higher in NL-44 compared to Vandana under stress. The difference in the gene expression levels in the vegetative and grain-filling phases as well as between the tolerant and susceptible varieties, revealed unique pathways of sugar signaling under heat stress. In the vegetative phase, the expression of OsTOR seems to be the difference between NL-44 and Vandana for their differed heat stress tolerance whereas, in the grain-filling phase, the difference between the varieties lay in the regulation of OsHXK2. The comparative changes in the expression levels between the genes under the varying conditions indicate the sugar status in the source and sink organs that are available for translocation or remobilization.
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Affiliation(s)
- K. Stephen
- Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - R. Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - A. G. Kiran
- Department of Plant Biotechnology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - S. Shanija
- Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - R. Saravanan
- ICAR-CTCRI, Thiruvananthapuram, Kerala 695017 India
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Beena R, Kirubakaran S, Nithya N, Manickavelu A, Sah RP, Abida PS, Sreekumar J, Jaslam PM, Rejeth R, Jayalekshmy VG, Roy S, Manju RV, Viji MM, Siddique KHM. Association mapping of drought tolerance and agronomic traits in rice (Oryza sativa L.) landraces. BMC Plant Biol 2021; 21:484. [PMID: 34686134 PMCID: PMC8539776 DOI: 10.1186/s12870-021-03272-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/29/2021] [Indexed: 05/26/2023]
Abstract
BACKGROUND Asian cultivars were predominantly represented in global rice panel selected for sequencing and to identify novel alleles for drought tolerance. Diverse genetic resources adapted to Indian subcontinent were not represented much in spite harboring useful alleles that could improve agronomic traits, stress resilience and productivity. These rice accessions are valuable genetic resource in developing rice varieties suited to different rice ecosystem that experiences varying drought stress level, and at different crop stages. A core collection of rice germplasm adapted to Southwestern Indian peninsular genotyped using SSR markers and characterized by contrasting water regimes to associate genomic regions for physiological, root traits and yield related traits. Genotyping-By-Sequencing of selected accessions within the diverse panel revealed haplotype variation in genic content within genomic regions mapped for physiological, morphological and root traits. RESULTS Diverse rice panel (99 accessions) were evaluated in field and measurements on plant physiological, root traits and yield related traits were made over five different seasons experiencing varying drought stress intensity at different crop stages. Traits like chlorophyll stability index, leaf rolling, days to 50% flowering, chlorophyll content, root volume and root biomass were identified as best predictors of grain yield under stress. Association mapping revealed genetic variation among accessions and revealed 14 genomic targets associated with different physiological, root and plant production traits. Certain accessions were found to have beneficial allele to improve traits, plant height, root length and spikelet fertility, that contribute to the grain yield under stress. Genomic characterization of eleven accessions revealed haplotype variation within key genomic targets on chromosomes 1, 4, 6 and 11 for potential use as molecular markers to combine drought avoidance and tolerance traits. Genes mined within the genomic QTL intervals identified were prioritized based on tissue specific expression level in publicly available rice transcriptome data. CONCLUSION The genetic and genomic resources identified will enable combining traits with agronomic value to optimize yield under stress and hasten trait introgression into elite cultivars. Alleles associated with plant height, specific leaf area, root length from PTB8 and spikelet fertility and grain weight from PTB26 can be harnessed in future rice breeding program.
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Affiliation(s)
- Radha Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
| | | | - Narayanan Nithya
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
| | - Alagu Manickavelu
- Department of Genomic Science, Central University of Kerala, Kasaragod, Kerala India
| | - Rameshwar Prasad Sah
- Indian Council of Agricultural Research (ICAR)-Central Rice Research Institute, currently named National Rice Research Institute (NRRI), Cuttack, Odisha India
| | - Puthenpeedikal Salim Abida
- Regional Agricultural Research Station, Pattambi, Kerala Agricultural University, Palakkad, Kerala India
| | - Janardanan Sreekumar
- Indian Council of Agricultural Research (ICAR)-Central Tuber Crops Research Institute, Sreekaryam, Thiruvananthapuram, Kerala India
| | | | - Rajendrakumar Rejeth
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
| | - Vijayalayam Gengamma Jayalekshmy
- Department of Plant Breeding and Genetics, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
| | - Stephen Roy
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
| | - Ramakrishnan Vimala Manju
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
| | - Mariasoosai Mary Viji
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala India
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Vijayakumar A, Shaji S, Beena R, Sarada S, Sajitha Rani T, Stephen R, Manju RV, Viji MM. High temperature induced changes in quality and yield parameters of tomato ( Solanum lycopersicum L.) and similarity coefficients among genotypes using SSR markers. Heliyon 2021; 7:e05988. [PMID: 33644434 PMCID: PMC7889828 DOI: 10.1016/j.heliyon.2021.e05988] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/02/2020] [Accepted: 01/12/2021] [Indexed: 12/13/2022] Open
Abstract
High temperature induced by climatic fluctuations are an important threat for plant growth, development and quality of agricultural produces. Adaptableness to environmental changes generally derives from a large set of genetic traits affecting physio-morphological, biochemical and agronomic parameters. Therefore, the identification of genotypes with higher yield and good quality parameters at high temperatures is becoming increasingly necessary for future breeding programs. Here, we analyzed the performance of different tomato genotypes grown under elevated temperatures in terms of yield and nutritional quality of the fruit. High temperature stress was induced from flower initiation to maturity stage by keeping the pots in a temperature controlled green house facility for 45 days. The quality and yield parameters were taken at the harvesting stage. Starch and soluble sugar concentration in the leaves of tomato genotypes showed significant reduction in its amount under heat stress. Titrable acidity (TA), total soluble solids (TSS) and ascorbic acid content of tomato fruits were highest under high temperature conditions compared to ambient condition but lycopene content decreased with rise in temperature. The yield attributes viz., number of fruits/plant, fruit set %, average fruit weight (g), yield per plant (g/plant) were significantly lower for Arka Saurabh, Arka Rakshak and Pusa Rohini when compared to other genotypes under study. Molecular characterization of selected 22 tomato genotypes were assessed using 25 simple sequence repeat (SSR) markers. Phylogenetic tree was constructed by the unweighted neighbour-joining method (UPGMA) using NTSYSpc cluster analysis software. The Jaccard's similarity matrix was constructed using the SIMQUAL method using UPGMA algorithm in NTSYSpc. Jaccard's similarity matrix among these tomato genotypes ranged from a minimum of 0.22 to a maximum of 1 with an average genetic similarity of 0.67. Hence this study has importance in identifying genotypes that could maintain good quality and higher yield under high temperature condition.
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Affiliation(s)
- Amrutha Vijayakumar
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - Shanija Shaji
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - R Beena
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - S Sarada
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - T Sajitha Rani
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - Roy Stephen
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - R V Manju
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
| | - M M Viji
- Department of Plant Physiology, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, India
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Rejeth R, Manikanta CLN, Beena R, Stephen R, Manju RV, Viji MM. Water stress mediated root trait dynamics and identification of microsatellite markers associated with root traits in rice ( Oryza sativa L.). Physiol Mol Biol Plants 2020; 26:1225-1236. [PMID: 32549685 PMCID: PMC7266872 DOI: 10.1007/s12298-020-00809-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/29/2020] [Accepted: 03/30/2020] [Indexed: 05/13/2023]
Abstract
To identify microsatellite markers associated with root traits for drought tolerance in rice (Oryza sativa L.) a study was conducted at Department of Plant Physiology, College of Agriculture, Trivandrum, Kerala Agricultural University. A set of thirty-five rice genotypes were exposed to water stress and evaluated for physio-morphological components as indices of water stress tolerance. Observations were made on leaf rolling score and root traits, especially the root length, root dry weight, root volume and root shoot ratio at booting stage. As of the data obtained, ten tolerant and ten susceptible varieties were selected for bulk line analysis to identify the DNA markers linked with target gene conferring drought tolerance. Out of 150 SSR primers screened, RM474 showed polymorphism between the tolerant and susceptible bulks. Individual genotypes of the bulks also showed the same product size of the respective tolerant and susceptible bulks.
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Affiliation(s)
- R. Rejeth
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - Ch. L. N. Manikanta
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - R. Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - Roy Stephen
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - R. V. Manju
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - M. M. Viji
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
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Rejeth R, Manikanta CLN, Beena R, Stephen R, Manju RV, Viji MM. Water stress mediated root trait dynamics and identification of microsatellite markers associated with root traits in rice ( Oryza sativa L.). Physiol Mol Biol Plants 2020; 26:1225-1236. [PMID: 32549685 DOI: 10.1007/s12298-020-00809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/29/2020] [Accepted: 03/30/2020] [Indexed: 05/26/2023]
Abstract
To identify microsatellite markers associated with root traits for drought tolerance in rice (Oryza sativa L.) a study was conducted at Department of Plant Physiology, College of Agriculture, Trivandrum, Kerala Agricultural University. A set of thirty-five rice genotypes were exposed to water stress and evaluated for physio-morphological components as indices of water stress tolerance. Observations were made on leaf rolling score and root traits, especially the root length, root dry weight, root volume and root shoot ratio at booting stage. As of the data obtained, ten tolerant and ten susceptible varieties were selected for bulk line analysis to identify the DNA markers linked with target gene conferring drought tolerance. Out of 150 SSR primers screened, RM474 showed polymorphism between the tolerant and susceptible bulks. Individual genotypes of the bulks also showed the same product size of the respective tolerant and susceptible bulks.
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Affiliation(s)
- R Rejeth
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - Ch L N Manikanta
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - R Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - Roy Stephen
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - R V Manju
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
| | - M M Viji
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala 695522 India
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Nysanth N, Meenakumari K, Syriac EK, Beena R. Screening of pink pigmented facultative methylotrophs for growth enhancement in paddy. Biocatalysis and Agricultural Biotechnology 2019. [DOI: 10.1016/j.bcab.2019.101055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Prince SJ, Beena R, Gomez SM, Senthivel S, Babu RC. Mapping Consistent Rice (Oryza sativa L.) Yield QTLs under Drought Stress in Target Rainfed Environments. Rice (N Y) 2015; 8:53. [PMID: 26206756 PMCID: PMC4513014 DOI: 10.1186/s12284-015-0053-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 05/22/2015] [Indexed: 05/26/2023]
Abstract
BACKGROUND Drought stress is a major limitation to rainfed rice production and yield stability. Identifying yield-associated quantitative trait loci (QTLs) that are consistent under drought stress predominant in target production environments, as well as across different genetic backgrounds, will help to develop high-yielding rice cultivars suitable for water-limited environments through marker-assisted breeding (MAB). Considerable progress has been made in mapping QTLs for drought resistance traits in rice; however, few have been successfully used in MAB. RESULTS Recombinant inbred lines of IR20 × Nootripathu, two indica cultivars adapted to rainfed target populations of environments (TPEs), were evaluated in one and two seasons under managed stress and in a rainfed target drought stress environment, respectively. In the managed stress environment, the severity of the stress meant that measurements could be made only on secondary traits and biomass. In the target environment, the lines experienced varying timings, durations, and intensities of drought stress. The rice recombinant inbred lines exhibited significant genotypic variation for physio-morphological, phenological, and plant production traits under drought. Nine and 24 QTLs for physio-morphological and plant production traits were identified in managed and natural drought stress conditions in the TPEs, respectively. Yield QTLs that were consistent in the target environment over seasons were identified on chromosomes 1, 4, and 6, which could stabilize the productivity in high-yielding rice lines in a water-limited rainfed ecosystem. These yield QTLs also govern highly heritable key secondary traits, such as leaf drying, canopy temperature, panicle harvest index and harvest index. CONCLUSION Three QTL regions on chromosome 1 (RM8085), chromosome 4 (I12S), and chromosome 6 (RM6836) harbor significant additive QTLs for various physiological and yield traits under drought stress. The similar chromosomal region on 4 and 6 were found to harbor QTLs for canopy temperature and leaf drying under drought stress conditions. Thus, the identified large effect yield QTLs could be introgressed to develop rice lines with stable yields under varying natural drought stress predominant in TPEs.
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Affiliation(s)
- Silvas J Prince
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University (TNAU), Coimbatore, 641 003 India
| | - R Beena
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University (TNAU), Coimbatore, 641 003 India
| | - S Michael Gomez
- International Center for Tropical Agriculture (CIAT), Colombia, 6713 Colombia
| | - S Senthivel
- Agricultural Research Station, Tamil Nadu Agricultural University (TNAU), Paramakudi, 623707 India
| | - R Chandra Babu
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University (TNAU), Coimbatore, 641 003 India
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