10. The use of CTM (cycloxydim tolerant maize) mutation in maize weeds control

J. Vanèetoviæ; M. Simiæ; S. Božinoviæ

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10. The use of CTM (cycloxydim tolerant maize) mutation in maize weeds control

In: Mutagenesis: exploring novel genes and pathways

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J. Vanèetoviæ

J. Vanèetoviæ
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M. Simiæ

M. Simiæ
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S. Božinoviæ

S. Božinoviæ
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Type:: Chapter

Pages:: 203–214

DOI:: https://doi.org/10.3920/978-90-8686-787-5_10

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The production of maize can only be successful with effective weed control. Over the past fifteen years, along with research of new selective herbicide molecules, a complementary approach has been developed: the selection of crop plant varieties tolerant to existing herbicidal substances. These varieties, known as herbicide tolerant, are the result of naturally occurring variability or the consequence of mutagenesis techniques. Cycloxydim is a systemic herbicide for post-emergence application in dicotyledonous crops to selectively control grass weeds. Cycloxydim tolerant maize (CTM) mutation was developed by researchers at the University of Minnesota in 1990. CTM plants were regenerated from tissue culture selected for callus growth in the presence of cycloxydim. The resulting plants showed to contain a mutation, expressed as a single, partially dominant gene that conferred tolerance to the herbicide. The right for its use was obtained by the BASF Company, which is an owner of a herbicide licence. The company’s preparation, Focus Ultra herbicide, contains 100 g/l of the active ingredient cycloxydim. Tolerance to cycloxydim can be achieved by the incorporation of one or two CTM alleles into a single cross maize hybrid, for the herbicide rates up to 4 l/ha, which is the maximum dose proposed by the producer. The CTM homozygote was tolerant up to the final observed rate of 10 l/ha, but this dosage is only of theoretical importance. Grain yield performance of the CTM hybrids is critical to the success of this technology. At the same time, grain yield performance and herbicide tolerance do not exclude each other and can co-exist. One out of nine ZP Ultra hybrids that were developed at the Maize Research Institute Zemun Polje have already reached a high production area in Serbia.

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Mutagenesis: exploring novel genes and pathways

E-Book ISBN:: 9789086867875

Publisher:: Wageningen Academic

Print Publication Date:: 17 Jun 2014

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

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10. The use of CTM (cycloxydim tolerant maize) mutation in maize weeds control

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Mutagenesis: exploring novel genes and pathways

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