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Obunyali CO, Pillay K, Meisel B, Ndou EN, Mashingaidze K, Sserumaga JP, Asea G, Mwimali M, Tende R, Beyene Y, Mugo S, Okogbenin E, Oikeh SO. Efficacy of Event MON 87460 in drought-tolerant maize hybrids under optimal and managed drought-stress in eastern and southern africa. J Genet Eng Biotechnol 2024; 22:100352. [PMID: 38494265 PMCID: PMC10941202 DOI: 10.1016/j.jgeb.2024.100352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/14/2024] [Accepted: 01/15/2024] [Indexed: 03/19/2024]
Abstract
BACKGROUND Frequent drought events due to climate change have become a major threat to maize (Zea mays L.) production and food security in Africa. Genetic engineering is one of the ways of improving drought tolerance through gene introgression to reduce the impact of drought stress in maize production. This study aimed to evaluate the efficacy of Event MON 87460 (CspB; DroughtGard®) gene in more than 120 conventional drought-tolerant maize hybrids in Kenya, South Africa, and Uganda for 3-6 years under managed drought-stress and optimal conditions and establish any additional yield contribution or yield penalties of the gene in traited hybrids relative to their non-traited isohybrids. Germplasm used in the study were either MON 87460 traited un-adapted (2008-2010), adapted traited DroughtTEGO® (2011-2013) or a mix of both under confined field trials. RESULTS Results showed significant yield differences (p < 0.001) among MON 87460 traited and non-traited hybrids across well-watered and managed drought-stress treatments. The gene had positive and significant effect on yield by 36-62% in three hybrids (CML312/CML445; WMA8101/CML445; and CML312/S0125Z) relative to non-traited hybrids under drought, and without significant yield penalty under optimum-moisture conditions in Lutzville, South Africa. Five traited hybrids (WMA2003/WMB4401; CML442/WMB4401; CML489/WMB4401; CML511/CML445; and CML395/WMB4401) had 7-13% significantly higher yield than the non-traited isohybrids out of 34 adapted DroughtTEGO® hybrids with same background genetics in the three countries for ≥ 3 years. The positive effect of MON 87460 was mostly observed under high drought-stress relative to low, moderate, or severe stress levels. CONCLUSION This study showed that MON 87460 transgenic drought tolerant maize hybrids could effectively tolerate drought and shield farmers against severe yield loss due to drought stress. The study signified that development and adoption of transgenic drought tolerant maize hybrids can cushion against farm yield losses due to drought stress as part of an integrated approach in adaptation to climate change effects.
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Affiliation(s)
- Caleb O Obunyali
- African Agricultural Technology Foundation (AATF), P.O Box 30709, 00100 Nairobi Kenya.
| | - Kiru Pillay
- Bayer Crop Science. 27 Wrench Rd, Isando, Johannesburg 1600, South Africa.
| | - Barbara Meisel
- Bayer Crop Science. 27 Wrench Rd, Isando, Johannesburg 1600, South Africa.
| | - Eric N Ndou
- Agricultural Research Council (ARC)-Grain Crops Institute Private Bag X1251, Potchefstroom 2520, South Africa; Present address: Bayer Crop Science. 27 Wrench Rd, Isando, Johannesburg, 1600, South Africa.
| | - Kingstone Mashingaidze
- Agricultural Research Council (ARC)-Grain Crops Institute Private Bag X1251, Potchefstroom 2520, South Africa.
| | - Julius Pyton Sserumaga
- National Agricultural Research Organization, National Livestock Resources Research Institute (NaLIRRI), P.O. Box 5704, Kampala, Uganda.
| | - Godfrey Asea
- National Agricultural Research Organization, National Crops Resources Research Institute, P.O Box 7084, Kampala, Uganda.
| | - Murenga Mwimali
- Kenya Agricultural and Livestock Research Organization (KALRO) Agricultural Mechanization Research Institute, P.O. Box 340-90100 Machakos, Kenya.
| | - Regina Tende
- Kenya Agricultural and Livestock Research Organization (KALRO) Agricultural Mechanization Research Institute, P.O. Box 340-90100 Machakos, Kenya.
| | - Yoseph Beyene
- International Maize and Wheat Improvement Center (CIMMYT), P. O. Box 1041, Village Market, 00621, Nairobi, Kenya.
| | - Stephen Mugo
- International Maize and Wheat Improvement Center (CIMMYT), P. O. Box 1041, Village Market, 00621, Nairobi, Kenya; Present Address: Center for Resilient Agriculture for Africa (CRA-Africa), PO Box 286-00206 Kiserian, Kenya.
| | - Emmanuel Okogbenin
- African Agricultural Technology Foundation (AATF), P.O Box 30709, 00100 Nairobi Kenya.
| | - Sylvester O Oikeh
- African Agricultural Technology Foundation (AATF), P.O Box 30709, 00100 Nairobi Kenya.
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Sahito JH, Zhang H, Gishkori ZGN, Ma C, Wang Z, Ding D, Zhang X, Tang J. Advancements and Prospects of Genome-Wide Association Studies (GWAS) in Maize. Int J Mol Sci 2024; 25:1918. [PMID: 38339196 PMCID: PMC10855973 DOI: 10.3390/ijms25031918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/30/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024] Open
Abstract
Genome-wide association studies (GWAS) have emerged as a powerful tool for unraveling intricate genotype-phenotype association across various species. Maize (Zea mays L.), renowned for its extensive genetic diversity and rapid linkage disequilibrium (LD), stands as an exemplary candidate for GWAS. In maize, GWAS has made significant advancements by pinpointing numerous genetic loci and potential genes associated with complex traits, including responses to both abiotic and biotic stress. These discoveries hold the promise of enhancing adaptability and yield through effective breeding strategies. Nevertheless, the impact of environmental stress on crop growth and yield is evident in various agronomic traits. Therefore, understanding the complex genetic basis of these traits becomes paramount. This review delves into current and future prospectives aimed at yield, quality, and environmental stress resilience in maize and also addresses the challenges encountered during genomic selection and molecular breeding, all facilitated by the utilization of GWAS. Furthermore, the integration of omics, including genomics, transcriptomics, proteomics, metabolomics, epigenomics, and phenomics has enriched our understanding of intricate traits in maize, thereby enhancing environmental stress tolerance and boosting maize production. Collectively, these insights not only advance our understanding of the genetic mechanism regulating complex traits but also propel the utilization of marker-assisted selection in maize molecular breeding programs, where GWAS plays a pivotal role. Therefore, GWAS provides robust support for delving into the genetic mechanism underlying complex traits in maize and enhancing breeding strategies.
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Affiliation(s)
- Javed Hussain Sahito
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Hao Zhang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Zeeshan Ghulam Nabi Gishkori
- Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Chenhui Ma
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhihao Wang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Dong Ding
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Xuehai Zhang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Jihua Tang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
- The Shennong Laboratory, Zhengzhou 450002, China
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Impact of climate perturbations on seeds and seed quality for global agriculture. Biochem J 2023; 480:177-196. [PMID: 36749123 DOI: 10.1042/bcj20220246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/05/2023] [Accepted: 01/16/2023] [Indexed: 02/08/2023]
Abstract
In agriculture, seeds are the most basic and vital input on which croplands productivity depends. These implies a good starting material, good production lines and good storage options. High-quality seed lots must be free of pests and pathogens and contain a required degree of genetic purity. Seeds need also to be stored in good condition between harvest and later sowing, to insure later on the field a good plant density and higher crop yield. In general, these parameters are already widely accepted and considered in many countries where advanced technologies evaluate them. However, the more and more frequently devastating climate changes observed around the world has put seed quality under threat, and current seeds may not be adapted to hazardous and unpredictable conditions. Climate-related factors such as temperature and water availability directly affect seed development and later germination. For these reasons, investigating seed quality in response to climate changes is a step to propose new crop varieties and practices that will bring solutions for our future.
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Osnato M. BREEDIT: Fast breeding tools to match the fast pace of climate change. THE PLANT CELL 2023; 35:4-5. [PMID: 36433789 PMCID: PMC9806623 DOI: 10.1093/plcell/koac328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Affiliation(s)
- Michela Osnato
- Assistant Features Editor, The Plant Cell, American Society of Plant Biologists, USA
- Institut de Ciencia i Tecnologia Ambientals, Universitat Autónoma de Barcelona (ICTA-UAB), 08193 Cerdanyola del Valle′s, Barcelona, Spain
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Lorenzo CD, Debray K, Herwegh D, Develtere W, Impens L, Schaumont D, Vandeputte W, Aesaert S, Coussens G, De Boe Y, Demuynck K, Van Hautegem T, Pauwels L, Jacobs TB, Ruttink T, Nelissen H, Inzé D. BREEDIT: a multiplex genome editing strategy to improve complex quantitative traits in maize. THE PLANT CELL 2023; 35:218-238. [PMID: 36066192 PMCID: PMC9806654 DOI: 10.1093/plcell/koac243] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 07/30/2022] [Indexed: 05/04/2023]
Abstract
Ensuring food security for an ever-growing global population while adapting to climate change is the main challenge for agriculture in the 21st century. Although new technologies are being applied to tackle this problem, we are approaching a plateau in crop improvement using conventional breeding. Recent advances in CRISPR/Cas9-mediated gene engineering have paved the way to accelerate plant breeding to meet this increasing demand. However, many traits are governed by multiple small-effect genes operating in complex interactive networks. Here, we present the gene discovery pipeline BREEDIT, which combines multiplex genome editing of whole gene families with crossing schemes to improve complex traits such as yield and drought tolerance. We induced gene knockouts in 48 growth-related genes into maize (Zea mays) using CRISPR/Cas9 and generated a collection of over 1,000 gene-edited plants. The edited populations displayed (on average) 5%-10% increases in leaf length and up to 20% increases in leaf width compared with the controls. For each gene family, edits in subsets of genes could be associated with enhanced traits, allowing us to reduce the gene space to be considered for trait improvement. BREEDIT could be rapidly applied to generate a diverse collection of mutants to identify promising gene modifications for later use in breeding programs.
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Affiliation(s)
| | | | - Denia Herwegh
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Ward Develtere
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Lennert Impens
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Dries Schaumont
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), B-9820 Merelbeke, Belgium
| | - Wout Vandeputte
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Stijn Aesaert
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Griet Coussens
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Yara De Boe
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Kirin Demuynck
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Tom Van Hautegem
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Laurens Pauwels
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Thomas B Jacobs
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Tom Ruttink
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), B-9820 Merelbeke, Belgium
| | - Hilde Nelissen
- Center for Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
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Sheoran S, Kaur Y, Kumar S, Shukla S, Rakshit S, Kumar R. Recent Advances for Drought Stress Tolerance in Maize ( Zea mays L.): Present Status and Future Prospects. FRONTIERS IN PLANT SCIENCE 2022; 13:872566. [PMID: 35707615 PMCID: PMC9189405 DOI: 10.3389/fpls.2022.872566] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/26/2022] [Indexed: 05/04/2023]
Abstract
Drought stress has severely hampered maize production, affecting the livelihood and economics of millions of people worldwide. In the future, as a result of climate change, unpredictable weather events will become more frequent hence the implementation of adaptive strategies will be inevitable. Through utilizing different genetic and breeding approaches, efforts are in progress to develop the drought tolerance in maize. The recent approaches of genomics-assisted breeding, transcriptomics, proteomics, transgenics, and genome editing have fast-tracked enhancement for drought stress tolerance under laboratory and field conditions. Drought stress tolerance in maize could be considerably improved by combining omics technologies with novel breeding methods and high-throughput phenotyping (HTP). This review focuses on maize responses against drought, as well as novel breeding and system biology approaches applied to better understand drought tolerance mechanisms and the development of drought-tolerant maize cultivars. Researchers must disentangle the molecular and physiological bases of drought tolerance features in order to increase maize yield. Therefore, the integrated investments in field-based HTP, system biology, and sophisticated breeding methodologies are expected to help increase and stabilize maize production in the face of climate change.
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