An efficient field screening procedure for identifying transposants for constructing an Ac/Ds-based...

Area of Science:

• Plant genetics
• Molecular biology
• Agricultural science

Background:

• Developing efficient methods for generating large-scale insertional mutagenesis populations is crucial for crop improvement.
• The Ac/Ds transposon system offers a powerful tool for genetic studies in plants.
• Previous Ac/Ds systems required improvements for large-scale field application and seedling-stage screening.

Purpose of the Study:

• To develop and test an improved Ac/Ds tagging system for efficient, large-scale insertional mutagenesis in rice.
• To enable convenient field screening and seedling-stage selection of transposants.
• To validate the reliability of the developed screening procedure.

Main Methods:

• Rice transformation with a plasmid containing a Basta-resistance gene (bar).
• Utilizing the Ac/Ds transposition system where Ds excision leads to bar gene activation.
• Large-scale field planting of F2 populations and selection of Basta-resistant plants.
• PCR analysis to confirm transposition events in selected plants.

Main Results:

• Successful generation of a large-scale insertional mutagenesis population in rice.
• Identification of numerous transposants from over 134,000 F2 plants.
• Confirmation of the reliability of the field screening procedure through PCR analysis of over 2,800 selected transposants.

Conclusions:

• The developed Ac/Ds tagging system is efficient for large-scale insertional mutagenesis in rice.
• The system allows for convenient field screening and seedling-stage selection of transposants.
• This methodology significantly enhances the ability to generate and screen mutant populations for crop research.