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Journal of Integrative Agriculture  2016, Vol. 15 Issue (06): 1304-1312    DOI: 10.1016/S2095-3119(15)61220-5
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The EPSPS Pro106Ser substitution solely accounts for glyphosate resistance in a goosegrass (Eleusine indica) population from Tennessee, United States
Janel L Huffman1, Chance W Riggins1, Lawrence E Steckel2, Patrick J Tranel1
1 Department of Crop Sciences, University of Illinois, Urbana, IL 61801, USA
2 Department of Plant Sciences, University of Tennessee, Jackson, TN 38301, USA
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Abstract    Previous studies have documented the occurrence of glyphosate-resistant (GR) goosegrass (Eleusine indica (L.) Gaertn.) and, in at least some cases, resistance is due to an altered target site. Research was performed to determine if an altered target site was responsible for GR in a Tennessee, United States goosegrass population (TennGR). DNA sequencing revealed a mutation in TennGR plants conferring the Pro106Ser 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) substitution previously identified in other GR populations. F2 populations were derived from TennGR plants crossed with plants from a glyphosate-susceptible population (TennGS) and analyzed for their response to glyphosate and genotyped at the EPSPS locus. Plants from the F2 populations segregated 1:2:1 sensitive:intermediate:resistant in response to a selective dose of glyphosate, and these responses co-segregated with the EPSPS genotypes (PP106, PS106, and SS106). To separately investigate the effect of the Pro106Ser substitution on GR, glyphosate dose-response curves and 50% effective dose (ED50) values were compared among the three genotypes and the two parental populations. The SS106 genotype was 3.4-fold resistant relative to the PP106 genotype, identical to the resistance level obtained when comparing the resistant and susceptible parental populations. We conclude that the mutation conferring a Pro106Ser EPSPS mutation is solely responsible for GR in the TennGR goosegrass population.
Keywords:  herbicide resistance        monogenic trait        glyphosate        PCR amplification of specific alleles (PASA)        EPSPS        target-site mutation  
Received: 10 August 2015   Accepted:
Corresponding Authors:  Patrick J Tranel, Tel: +1-217-3331531, E-mail:    
About author:  Janel L Huffman, E-mail:

Cite this article: 

Janel L Huffman, Chance W Riggins, Lawrence E Steckel, Patrick J Tranel. 2016. The EPSPS Pro106Ser substitution solely accounts for glyphosate resistance in a goosegrass (Eleusine indica) population from Tennessee, United States. Journal of Integrative Agriculture, 15(06): 1304-1312.

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