Editing Genetically modified maize (section)

== Products in development ==
In 2007, South African researchers announced the production of transgenic maize resistant to [[maize streak virus]] (MSV), although it has not been released as a product.<ref>{{cite journal | vauthors = Shepherd DN, Mangwende T, Martin DP, Bezuidenhout M, Kloppers FJ, Carolissen CH, Monjane AL, Rybicki EP, Thomson JA | display-authors = 6 | title = Maize streak virus-resistant transgenic maize: a first for Africa | journal = Plant Biotechnology Journal | volume = 5 | issue = 6 | pages = 759–67 | date = November 2007 | pmid = 17924935 | doi = 10.1111/j.1467-7652.2007.00279.x | citeseerx = 10.1.1.584.7352 }}</ref> While breeding cultivars for resistance to MSV isn't done in the public, the private sector, international research centers, and national programmes have done all of the breeding.<ref>{{cite journal |vauthors=Pratt R, Gordon S, Lipps P, Asea G, Bigirwa G, Pixley K |title=Use of IPM in the control of multiple diseases in maize: strategies for selection of host resistance |journal= African Crop Science Journal |volume=11 |issue=3 |pages=189–98 |date=June 2003 |doi=10.4314/acsj.v11i3.27570|url=http://www.bioline.org.br/pdf?cs03022 |doi-access=free |hdl=1807/47314 |hdl-access=free }}</ref> As of 2014, there have been a few MSV-tolerant cultivars released in Africa.  A private company ''Seedco'' has released 5 MSV cultivars.<ref>{{cite web |url=https://www.seedcogroup.com/zm/search/node/msv%20tolerance |title=Search Results:MSV tolerance |website=Seed Co-The African Seed Company |access-date=18 December 2021 |archive-date=30 June 2022 |archive-url=https://web.archive.org/web/20220630195149/https://www.seedcogroup.com/zm/search/node/msv%20tolerance |url-status=dead }}</ref>

Research has been done on adding a single ''E. coli'' gene to maize to enable it to be grown with an essential amino acid (methionine).<ref>{{cite journal | vauthors = Planta J, Xiang X, Leustek T, Messing J | title = Engineering sulfur storage in maize seed proteins without apparent yield loss | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 114 | issue = 43 | pages = 11386–11391 | date = October 2017 | pmid = 29073061 | pmc = 5664557 | doi = 10.1073/pnas.1714805114 | bibcode = 2017PNAS..11411386P | doi-access = free }}</ref><ref>{{cite web|url=https://news.rutgers.edu/genetically-boosting-nutritional-value-corn-could-benefit-millions/20171009|title=Genetically Boosting the Nutritional Value of Corn Could Benefit Millions - Rutgers Today|website=news.rutgers.edu|date=9 October 2017}}</ref>