Norme internationale
ISO/TS 21569-7:2022
Méthodes horizontales d'analyse moléculaire de biomarqueurs — Méthodes d'analyse pour la détection des organismes génétiquement modifiés et des produits dérivés — Partie 7: Méthodes par PCR en temps réel pour la détection des séquences ADN dérivées du plasmide Ti de la bactérie Agrobacterium et du CaMV (virus de la mosaïque du chou-fleur)
Numéro de référence
ISO/TS 21569-7:2022
Edition 1
2022-12
Norme internationale
Prévisualiser
ISO/TS 21569-7:2022
84434
Indisponible en français
Publiée (Edition 1, 2022)

ISO/TS 21569-7:2022

ISO/TS 21569-7:2022
84434
Langue
Format
CHF 63
Convertir les francs suisses (CHF) dans une autre devise

Résumé

This document specifies a procedure for the detection of a DNA sequence of the open reading frame five (ORF V) from cauliflower mosaic virus (CaMV) and a procedure for the detection of the DNA sequence of the nopaline synthase (nos) gene from tumour-inducing (Ti) plasmids of phytopathogenic Rhizobium radiobacter (formerly named Agrobacterium tumefaciens). The procedures can be used in the context of screening for genetically modified crop/plants and their derived products to further clarify a positive PCR result for a specific promoter or terminator of CaMV (P-35S, T-35S), or both, and the nos gene (P-nos, T-nos), respectively.

The methods specified in this document will detect and identify naturally occurring CaMV or Rhizobium radiobacter (Ti plasmid) DNA, or both, if present in the sample in the absence of a genetically modified plant event containing the specified target sequences.

Both methods are based on the real-time polymerase chain reaction (PCR) and are applicable for the analysis of DNA extracted from foodstuffs and other products such as feedstuffs and seeds/grains. The application of the methods requires the extraction of an adequate amount of amplifiable DNA from the relevant matrix.

With appropriate calibration material, the CaMV ORF V or nos copy number, or both, can be estimated and compared, respectively, with the estimated copy number for the promoter (P-35S, P-nos) or the terminator (T-35S, T-nos) sequences, or both. Thereby, conclusions are possible about the presence of an unknown genetically modified organism (GMO) in addition to any detected CaMV DNA or Rhizobium radiobacter Ti plasmid DNA, or both, in a test sample.

Informations générales

  •  : Publiée
     : 2022-12
    : Norme internationale publiée [60.60]
  •  : 1
  • ISO/TC 34/SC 16
    67.050 
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