Hygromycin resistance as an efficient selectable marker for wheat stable transformation.

Area of Science:

• Plant Biotechnology
• Molecular Biology
• Agricultural Science

Background:

• Stable transformation is crucial for crop improvement.
• Effective selectable markers are essential for identifying transformed plant cells.
• Previous methods often faced efficiency limitations.

Purpose of the Study:

• To describe a highly efficient method for stable wheat transformation.
• To evaluate hygromycin resistance (hpt gene) as a selectable marker.
• To compare the efficiency of the hpt gene with the bar gene.

Main Methods:

• Transformation of immature wheat embryos using a microparticle accelerator.
• Selection of transformed cells using hygromycin resistance.
• Confirmation of transgenics via PCR, Southern hybridization, gene expression analysis, and progeny testing.

Main Results:

• Achieved an average transformation efficiency of 5.5% using the hpt gene.
• The hpt gene demonstrated significantly higher efficiency compared to the bar gene (2.6%).
• Successfully generated and confirmed stable transgenic wheat plants.

Conclusions:

• Hygromycin resistance (hpt gene) is a superior selectable marker for wheat transformation.
• The described method provides a robust and efficient approach for developing transgenic wheat.
• This advancement can accelerate the development of improved wheat varieties.