|Blair-Kerth, Lesli - TEXAS TECH UNIV|
|Dotray, Peter - TEXAS TECH UNIV|
|Keeling, J - TAES, LUBBOCK, TX|
|Gannaway, John - TAES, LUBBOCK, TX|
Submitted to: Weed Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 1, 2002
Publication Date: N/A
Interpretive Summary: Many bioengineering projects to improve crop performance fail when the transgenic plants (plants that contain introduced genes) are evaluated under field conditions. This manuscript describes experiments to evaluate the field performance of a cotton line engineered to contain a bacterial gene that renders the plant resistant to the herbicide glufosinate. The line had proven effective in greenhouse and lab trials and, from the experiments reported in this manuscript, it also proves to perform well in a field trial. The plants retained effective herbicide resistance regardless of when, or at what stage, the plants were exposed to the herbicide. This now provides a useful herbicide resistant line of cotton for use in commercial breeding lines.
Technical Abstract: Field experiments from 1997 to 1999 examined plant growth parameters of Gossypium hirsutum L. (cotton) that was genetically transformed to exhibit tolerance to glufosinate. Regardless of growth stage at application, number of applications, or glufosinate application rate, no visual injury or adverse effects on G. hirsutum development, yield, or fiber quality were observed. This research indicated that the transformation events for glufosinate-tolerance in G. hirsutum cv. 'Coker 312' were successful and the gene expressing glufosinate-tolerance was expressed throughout the growing season.