A Recessive Pollination Control System for Wheat Based on Intein-Mediated Protein Splicing

Area of Science:

• Plant Biotechnology
• Molecular Biology
• Genetics

Background:

• Traditional hybrid seed production in wheat is challenging.
• Developing efficient transgene expression systems is crucial for crop improvement.
• Split-intein technology offers a novel approach for protein reconstitution.

Purpose of the Study:

• To develop and optimize a split-intein based transgene expression system in wheat.
• To utilize this system for inducing male sterility for hybrid wheat production.
• To explore the role of introns and linkers in enhancing transgene expression.

Main Methods:

• Fusion of barnase gene fragments with intein sequences from Synechocystis sp.
• Transformation of wheat plants with the engineered gene constructs.
• Utilizing autocatalytic intein-mediated trans-splicing for barnase enzyme assembly.
• Investigating the effects of introns and polypeptide linkers on expression levels.

Main Results:

• Successful reconstitution of a functional barnase enzyme in wheat via split-intein trans-splicing.
• Demonstration of male sterility in transgenic wheat plants.
• Identification of optimal expression vector designs for the split-barnase system.
• Evidence that introns and linkers influence transgene expression efficiency.

Conclusions:

• The split-intein system provides a viable tool for generating male sterility in wheat.
• This technology facilitates the production of hybrid wheat seeds.
• The developed expression system and toolbox can aid in future wheat breeding strategies.