Editing Cultivar (section)

=== Genetically modified ===

{{Main|Genetic engineering}}

Genetically modified plants with characteristics resulting from the deliberate implantation of genetic material from a different [[germplasm]] may form a cultivar. However, the [[International Code of Nomenclature for Cultivated Plants]] notes, "In practice such an assemblage is often marketed from one or more lines or multilines that have been genetically modified. These lines or multilines often remain in a constant state of development which makes the naming of such an assemblage as a cultivar a futile exercise."<ref>Cultivated Plant Code, Articles 2.19 {{Harvnb|Brickell|2009|pp=8–9}}</ref> However, retired transgenic varieties such as the [[fish tomato]], which are no longer being developed, do not run into this obstacle and can be given a cultivar name.

Cultivars may be selected because of a change in the [[ploidy]] level of a plant which may produce more desirable characteristics.<ref>{{Cite book |last=Lebot |first=Vincent |url=https://books.google.com/books?id=UInHDwAAQBAJ&pg=PA239 |title=Tropical Root and Tuber Crops, 2nd Edition |date=2019-12-02 |publisher=CABI |isbn=978-1-78924-336-9 |language=en}}</ref>