Studies on the transfer techniques of three maize genes

Area of Science:

• Agricultural Science
• Molecular Biology
• Genetics

Background:

• Maize (Zea mays) is a vital global crop requiring efficient genetic modification techniques.
• Developing transgenic maize with pest resistance, like that conferred by Bt-toxin, is crucial for sustainable agriculture.

Purpose of the Study:

• To establish and compare the efficacy of different maize transformation methods.
• To confirm the successful integration of the Bt-toxin gene into the maize genome.

Main Methods:

• Maize transformation was achieved using microprojectile bombardment, ultrasonication, and ovary injection.
• The plasmid pB48.415, containing a truncated Bt-toxin gene and hygromycin phosphotransferase (hpt) gene, was utilized.
• Transgenic events were generated from immature embryos and embryogenic calli.

Main Results:

• Transgenic maize plants were successfully regenerated using all tested transformation methods.
• Dot blotting and Southern blotting confirmed the stable integration of the Bt gene into the maize genome.
• The hygromycin phosphotransferase gene served as a selectable marker.

Conclusions:

• Multiple efficient methods for maize transformation have been demonstrated.
• Genetic modification of maize with the Bt gene is feasible, paving the way for insect-resistant varieties.
• This research contributes to the development of advanced crop protection strategies.