Identification of Unwanted Plant Species (Weeds) among Seeds for Sale

Diagnosing prohibited noxious weed species that cannot be distinguished visually from other desired plant varieties

Unaltered Image by Dinesh Valke

Available for License

IP Status

US Utility Patent: US 9963750


Todd Gaines
Eric L. Patterson
Kallie Kessler
Margaret Flemming

Technology Overview

Several Amaranthus species are very common prohibited noxious weeds (e.g., palmeri and tuberculatus) that cannot be reliably visually identified from other Amaranthus species (e.g. retroflexus, hybridus, and spinosus).  Researchers at Colorado State University have developed a novel assay  by identifying polymorphisms which identify each of the nine Amaranthus species.  Specifically, this assay is used to detect at minimum one Palmer amaranth seed in 50 seeds, as well as identifying waterhemp at the same ratio. Further, this assay detects regions in Amaranthus species which contain sequence polymorphisms that enable the identification of each of nine Amaranthus species (A. palmeri, A. tuberculatus, A. albus, A. spinosus, A. blitoides, A. arenicola, A. hybridus, A. powellii, and A. retroflexus).

Licensing Director

Steve Foster

Reference No.: 17-051

  • Identification of Palmer amaranth at a 1 in 50 seed ratio (or better)
  • Uses reliable, robust industry standard genotyping methodology
  • Assay validated using blind samples

Last updated: May 2020