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Tolerance of transformed cotton to glufosinate

Published online by Cambridge University Press:  20 January 2017

Lesli K. Blair-Kerth ,
Peter A. Dotray ,
J. Wayne Keeling ,
John R. Gannaway ,
Mel J. Oliver  and
Jerry E. Quisenberry
Lesli K. Blair-Kerth
Affiliation:
Department of Plant and Soil Science, Mailstop 2122, Texas Tech University, Lubbock, TX 79409-2122
J. Wayne Keeling
Affiliation:
Texas Agricultural Experiment Station, Lubbock, TX 79401-9757
John R. Gannaway
Affiliation:
Texas Agricultural Experiment Station, Lubbock, TX 79401-9757
Mel J. Oliver
Affiliation:
Plant Stress and Water Conservation Laboratory, USDA-ARS, Lubbock, TX 79415
Jerry E. Quisenberry
Affiliation:
Plant Stress and Water Conservation Laboratory, USDA-ARS, Lubbock, TX 79415
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Abstract

Field experiments from 1997 to 1999 examined cotton cv. ‘Coker 312’ that was genetically transformed to tolerate glufosinate. None of the glufosinate treatments caused visible injury to the glufosinate-tolerant cotton, but treatments were lethal to nontransformed or nonexpressing cotton. No glufosinate treatment adversely affected plant height at maturity, total number of nodes, bolls per plant, or boll positions. Glufosinate applications of 0.6 kg ha−1 made at eight stages of growth, ranging from cotyledon stage to 50% open boll, did not adversely affect yield or fiber quality as measured by micronaire or fiber length and strength. Sequential glufosinate applications up to four stages of growth from the zero- to one-leaf stage to the 14- to 15-leaf stage or individual glufosinate applications at 3.3 kg ha−1 made at the two- to three-leaf stage of growth also did not adversely affect yield or fiber quality. Overall yields in these studies were low relative to normal Texas Southern High Plains cotton yield because these studies were conducted using a Coker 312 parental line, which is generally a poor performer in this region. This research indicated that the transformation events for glufosinate tolerance in cotton were successful and the glufosinate-tolerance gene was expressed throughout the growing season. Transformation and field testing of other cotton varieties are needed to improve varietal performance on the Texas Southern High Plains.

Keywords

Glufosinatecotton, Gossypium hirsutum L. ‘Coker 312’Sequential applicationsstage of growthherbicide ratebialaphos resistance geneBAR gene
Type
Research Article
Information
Weed Science , Volume 49 , Issue 3 , June 2001 , pp. 375 - 380
Copyright
Copyright © Weed Science Society of America 

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