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Modified Organism
DP-Ø9814Ø-6 - Optimum™ GAT™ maize
Record information and status
Record ID
Date of creation
2009-03-25 13:50 UTC (manoela.miranda@cbd.int)
Date of last update
2013-03-20 15:03 UTC (dina.abdelhakim@cbd.int)
Date of publication
2013-03-20 15:03 UTC (dina.abdelhakim@cbd.int)

Living Modified Organism identity
The image below identifies the LMO through its unique identifier, trade name and a link to this page of the BCH. Click on it to download a larger image on your computer. For help on how to use it go to the LMO quick-links page.

LMO name
Optimum™ GAT™ maize
Transformation event
Unique identifier
Pioneer Hi-Bred Northern Europe Sales Division GmbH
Apensener Str. 198
Buxtehude, Niedersachsen
Germany, 21604
Url:Pioineer Hi-Bred Northern Europe, Deutschland,Pioneer Hi-Bred International
The 98140 maize has been genetically modified (GM) to express the GAT4621 and ZM-HRA proteins. The GAT4621 protein is a glyphosate acetyltransferase (GAT), encoded by an optimized form of the gat gene from Bacillus licheniformis. When cultivated, expression of the GAT4621 protein in 98140 maize confers tolerance to the herbicide glyphosate. The ZM-HRA protein is an acetolactate synthase (ALS) encoded by the zm-hra gene, an optimized form of the endogenous als gene from Zea mays. When cultivated, expression of the ZM-HRA protein in 98140 maize confers tolerance to ALS-inhibiting herbicides, such as chlorimuron and thifensulfuron.
Recipient Organism or Parental Organisms
The term Recipient organism refers to an organism (either already modified or non-modified) that was subjected to genetic modification, whereas Parental organisms refers to those that were involved in cross breeding or cell fusion.
Zea mays - Maize, Corn, MAIZE
Characteristics of the transformation process
Techniques used for the modification
  • Agrobacterium-mediated DNA transfer
Genetic elements construct
Proteinase inhibitor II gene terminator
0.31 Kb
Acetohydroxyacid synthase gene
1.92 Kb
Acetohydroxyacid synthase gene promoter
0.66 Kb
Ubiquitin gene promoter
0.90 Kb
Ubiquitin 5' Untranslated Region
0.08 Kb
Ubiquitin Intron 1
1.01 Kb
Glyphosate-N-Acteyltransferase gene
0.44 Kb
Proteinase inhibitor II gene terminator
0.32 Kb
Further details
Notes regarding the genetic elements introduced or modified in this LMO
For transformation of 98140 maize, binary vector PHP24279 was used. The between the left and right border repeats, the inserted T-DNA consists of a 7440 bp sequence contains, in addition to the genetic elements listed above:

Three copies of the CaMV 35S enhancer region from cauliflower mosaic virus between the promoters of the two expression casettes which contribute to enhance expression of both the gat4621 and zm-hra genes.
LMO characteristics
Modified traits
Common use(s)
  • Food
  • Feed
Detection method(s)
Additional information
The results of the molecular characterization described in this application support the conclusion that 98140 maize contains a single and full-length copy of the T-DNA region from binary vector PHP24279.
Additional Information
Additional Information
Authorisation of import and processing of DP-Ø9814Ø-6 in the EU has been applied for.

Records referencing this document (34)
34record(s) found
Country's Decision or any other Communication8 records
Modified Organism3 records
Organization11 records
Risk Assessment12 records