Crop ferality: Implications for novel trait confinement

• Published in: Agriculture, ecosystems & environment Vol. 127; no. 1; pp. 1 - 6
• Main Authors: Bagavathiannan, M.V., Van Acker, R.C.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2008; Amsterdam; New York: Elsevier; Elsevier Science
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Co-existence; Crop ferality; crops; disease resistance; domestication; drought tolerance; evolution; feral crops; Fundamental and applied biological sciences. Psychology; Gene flow; General agroecology; General agroecology. Agricultural and farming systems. Agricultural development. Rural area planning. Landscaping; General agronomy. Plant production; Generalities. Agricultural and farming systems. Agricultural development; Genetic engineering applications; genetic resistance; Genetics and breeding of economic plants; GM crops; hybridization; literature reviews; novel traits; pest resistance; plant breeding; Plant breeding: fundamental aspects and methodology; salt tolerance; seed dormancy; Trait confinement; transgenic plants; volunteer crops; Gene flow; Co-existence; Trait confinement; Crop ferality; GM crops; Transgenic plant
• ISSN: 0167-8809; 1873-2305
• DOI: 10.1016/j.agee.2008.03.009

Ferality is observed in many crop species wherein individuals of the cultivated crop reproduce successfully and establish a self-perpetuating population in natural or semi-natural habitats. Feral populations can evolve to differ from their parent populations and lose traits associated with domestication including for example, a lack of seed dormancy. Hybridization between wild and cultivated forms of cropped species may facilitate ferality. If GM plants become feral, they can establish populations in natural and semi-natural environments and act as both a source and sink for novel traits. The presence of novel traits may facilitate the persistence of feral populations if the novel trait confers a selective advantage (e.g. drought tolerance, salinity tolerance, pest and disease resistance), but there is no evidence yet that transgenesis per se facilitates ferality. In some cases and in some jurisdictions, the introduction of GM crops will require assurances of effective segregation and novel trait confinement. The existence of feral crop populations can make novel trait confinement more difficult. Monitoring and management of feral populations will be required for effective novel trait confinement.