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      Identification of genomic regions of wheat associated with grain Fe and Zn content under drought and heat stress using genome-wide association study

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          Abstract

          Wheat is the staple food crop of global importance for its grain nutrient quality. Grain iron and zinc content of the wheat grain is an important quantitatively inherited trait that is influenced by the environmental factors such as drought and heat stress. Phenotypic evaluation of 295 advanced breeding lines from the wheat stress breeding program of IARI was carried out under timely sown irrigated (IR), restricted irrigated, and late-sown conditions at New Delhi during the cropping season of 2020–21, and grain iron (GFeC) and zinc (GZnC) contents were estimated from both control and treatments. A statistically significant increase in GFeC and GZnC was observed under stress conditions compared to that of the control. Genotyping was carried out with the SNPs from the 35K Axiom Breeder’s array, and marker–trait association was identified by GWAS analysis. Of the 23 MTAs identified, seven were linked with GFeC and sixteen were linked with GZnC. In silico analysis revealed a few important transcripts involved in various plant metabolism, growth, and development activities such as auxin response factor, root UVB sensitive proteins, potassium transporter, glycosyl transferase, COBRA, and F-box-like domain. The identified MTAs can be used for molecular breeding after validation and also for rapid development of micronutrient-rich varieties of wheat to mitigate hidden hunger.

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          Most cited references41

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          A method is presented for the rapid isolation of high molecular weight plant DNA (50,000 base pairs or more in length) which is free of contaminants which interfere with complete digestion by restriction endonucleases. The procedure yields total cellular DNA (i.e. nuclear, chloroplast, and mitochondrial DNA). The technique is ideal for the rapid isolation of small amounts of DNA from many different species and is also useful for large scale isolations.
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              Climate trends and global crop production since 1980.

              Efforts to anticipate how climate change will affect future food availability can benefit from understanding the impacts of changes to date. We found that in the cropping regions and growing seasons of most countries, with the important exception of the United States, temperature trends from 1980 to 2008 exceeded one standard deviation of historic year-to-year variability. Models that link yields of the four largest commodity crops to weather indicate that global maize and wheat production declined by 3.8 and 5.5%, respectively, relative to a counterfactual without climate trends. For soybeans and rice, winners and losers largely balanced out. Climate trends were large enough in some countries to offset a significant portion of the increases in average yields that arose from technology, carbon dioxide fertilization, and other factors.
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                Author and article information

                Contributors
                Journal
                Front Genet
                Front Genet
                Front. Genet.
                Frontiers in Genetics
                Frontiers Media S.A.
                1664-8021
                21 October 2022
                2022
                : 13
                : 1034947
                Affiliations
                [1] 1 Division of Genetics , ICAR-Indian Agricultural Research Institute , New Delhi, India
                [2] 2 ICAR- Indian Institute of Wheat and Barley Research , Karnal, India
                Author notes

                Edited by: Dwijesh Chandra Mishra, Indian Agricultural Statistics Research Institute (ICAR) India

                Reviewed by: Upendra Kumar, Chaudhary Charan Singh Haryana Agricultural University, India

                Hengyou Zhang, Northeast Institute of Geography and Agroecology (CAS), China

                *Correspondence: Hari Krishna, harikrishna.agri@ 123456gmail.com ; P. K. Singh, pksinghiari@ 123456gmail.com

                This article was submitted to Plant Genomics, a section of the journal Frontiers in Genetics

                Article
                1034947
                10.3389/fgene.2022.1034947
                9634069
                36338980
                57bafa61-cce4-4cb0-afa2-7f742af6e7d2
                Copyright © 2022 Devate, Krishna, Sunilkumar, Manjunath, Mishra, Jain, Singh and Singh.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                : 02 September 2022
                : 07 October 2022
                Funding
                Funded by: Bill and Melinda Gates Foundation , doi 10.13039/100000865;
                Award ID: OPP1215722
                Categories
                Genetics
                Original Research

                Genetics
                wheat,grain iron and zinc content,gwas,drought stress,heat stress
                Genetics
                wheat, grain iron and zinc content, gwas, drought stress, heat stress

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