Monitoring transgene expression levels in different genotypes of field grown maize (Zea mays L.)

A. Bakó, G. Gell, Á Zámbó, T. Spitkó, I. Pók, J. Pintér, E. Balázs

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Transgenes in commercially available genetically modified plants are generally controlled by strong constitutive promoters to ensure a high level of expression at all stages of cultivation. Constitutive promoters however are influenced by a wide range of factors, and expression profiles of the transgenes in multiple genetic backgrounds have not yet been extensively studied. In this study a powerful expression profiling methodology for transgenic maize (Zea mays L.) is demonstrated on a large scale, analysing thousands of data points from three genotypes of herbicide and insect pest tolerant transgenic maize. Martonvásár inbred lines were crossed with LH244 maize line containing the MON 88017 events, and leaf tissue from the sixth backcross generation was sampled at four relevant phenological phases. Relative expression levels were determined using 18S rRNA as a reference and detailed statistical analysis performed. Expression levels of both transgenes are varied throughout plant development, and the interaction between the genetic background and phenophase are significant (p <0.05). Expression is present at a significant level throughout all the phenological stages. We found that the genetic background has a significant (p. <0.01) effect on transgene expression levels in the case of the CP4epsps transgene, but not in the case of cry3Bb1, implying that the sensitivity of different constitutive promoter constructs to the effects of the genetic background is different.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
JournalSouth African Journal of Botany
Volume84
DOIs
Publication statusPublished - Jan 2013

Fingerprint

transgenes
Zea mays
genetic background
corn
monitoring
genotype
promoter regions
genetically modified organisms
insect pests
inbred lines
plant development
statistical analysis
herbicides
ribosomal RNA
leaves
methodology

Keywords

  • CP4 epsp
  • Cry3Bb1
  • Herbicide tolerance
  • Maize
  • Transgene expression profile

ASJC Scopus subject areas

  • Plant Science

Cite this

Monitoring transgene expression levels in different genotypes of field grown maize (Zea mays L.). / Bakó, A.; Gell, G.; Zámbó, Á; Spitkó, T.; Pók, I.; Pintér, J.; Balázs, E.

In: South African Journal of Botany, Vol. 84, 01.2013, p. 6-10.

Research output: Contribution to journalArticle

Bakó, A. ; Gell, G. ; Zámbó, Á ; Spitkó, T. ; Pók, I. ; Pintér, J. ; Balázs, E. / Monitoring transgene expression levels in different genotypes of field grown maize (Zea mays L.). In: South African Journal of Botany. 2013 ; Vol. 84. pp. 6-10.
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