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https://hdl.handle.net/2440/72691
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Type: | Journal article |
Title: | Interspecific hybridization transfers a previously unknown glyphosate resistance mechanism in Amaranthus species |
Author: | Gaines, T. Ward, S. Bukun, B. Preston, C. Leach, J. Westra, P. |
Citation: | Evolutionary Applications: evolutionary approaches to environmental, biomedical and socio-economic issues, 2012; 5(1):29-38 |
Publisher: | Wiley Blackwell Publishing Inc |
Issue Date: | 2012 |
ISSN: | 1752-4563 1752-4571 |
Statement of Responsibility: | Todd A. Gaines, Sarah M. Ward, Bekir Bukun, Christopher Preston, Jan E. Leach and Philip Westra |
Abstract: | A previously unknown glyphosate resistance mechanism, amplification of the 5-enolpyruvyl shikimate-3-phosphate synthase gene, was recently reported in Amaranthus palmeri. This evolved mechanism could introgress to other weedy Amaranthus species through interspecific hybridization, representing an avenue for acquisition of a novel adaptive trait. The objective of this study was to evaluate the potential for this glyphosate resistance trait to transfer via pollen from A. palmeri to five other weedy Amaranthus species (Amaranthus hybridus, Amaranthus powellii, Amaranthus retroflexus, Amaranthus spinosus, and Amaranthus tuberculatus). Field and greenhouse crosses were conducted using glyphosateresistant male A. palmeri as pollen donors and the other Amaranthus species as pollen recipients. Hybridization between A. palmeri and A. spinosus occurred with frequencies in the field studies ranging from <0.01% to 0.4%, and 1.4% in greenhouse crosses. A majority of the A. spinosus X A. palmeri hybrids grown to flowering were monoecious and produced viable seed. Hybridization occurred in the field study between A. palmeri and A. tuberculatus (<0.2%), and between A. palmeri and A. hybridus (<0.01%). This is the first documentation of hybridization between A. palmeri and both A. spinosus and A. hybridus. |
Keywords: | 5-enolpyruvyl shikimate-3-phosphate synthase evolution evolutionary adaptive change gene amplification gene flow genetic introgression glyphosate Palmer amaranth (Amaranthus palmeri S. Wats.) transgenic crops |
Rights: | © 2011 Blackwell Publishing Ltd. This is an open access article under the terms of the Creative Commons Attribution Non Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
DOI: | 10.1111/j.1752-4571.2011.00204.x |
Published version: | http://dx.doi.org/10.1111/j.1752-4571.2011.00204.x |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 5 |
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hdl_72691.pdf | Published version | 111.98 kB | Adobe PDF | View/Open |
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