Meng Y, Zhang W, Wang Z, Yuan F, Guo S, Lin H, Niu L. Co-expression of
GR79 EPSPS and
GAT generates high glyphosate-resistant alfalfa with low glyphosate residues.
ABIOTECH 2023;
4:352-358. [PMID:
38106433 PMCID:
PMC10721576 DOI:
10.1007/s42994-023-00119-3]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/07/2023] [Indexed: 12/19/2023]
Abstract
Weed competition seriously threatens the yield of alfalfa, the most important forage legume worldwide, thus generating herbicide-resistant alfalfa varieties is becoming a necessary cost-effective strategy to assist farmers for weed control. Here, we report the co-expression of plant codon-optimized forms of GR79 EPSPS (pGR79 EPSPS) and N-acetyltransferase (pGAT) genes, in alfalfa, via Agrobacterium-mediated transformation. We established that the pGR79 EPSPS-pGAT co-expression alfalfa lines were able to tolerate up to tenfold higher commercial usage of glyphosate and produced approximately ten times lower glyphosate residues than the conventional cultivar. Our findings generate an elite herbicide-resistant germplasm for alfalfa breeding and provide a promising strategy for developing high-glyphosate-resistant and low-glyphosate-residue forages.
Supplementary Information
The online version contains supplementary material available at 10.1007/s42994-023-00119-3.
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