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Increase in EPSPS genomic relative copy number is positively correlated with increase in EPSPS cDNA expression levels in selected A. palmeri glyphosate-resistant (filled circles), -susceptible (open circles), and pseudo-F2 individuals [pseudo-F2 hand pollinated (open triangles), open pollinated (open squares)]. Genomic copy numbers and expression levels are relative to ALS and were determined by quantitative PCR as described in Materials and Methods.
