Jan and mini-Jan, a model system for potato functional genomics

Area of Science:

• Plant Science
• Genomics
• Agricultural Science

Background:

• Potato (Solanum tuberosum) is a globally significant food crop.
• Functional genomics in potato is hindered by the absence of a suitable experimental model.
• Existing potato research models lack the necessary traits for efficient genetic studies.

Purpose of the Study:

• To develop and characterize a novel diploid potato line for advanced functional genomics.
• To create miniaturized potato lines for high-throughput research.
• To provide a robust model system for gene editing and genetic studies in potato.

Main Methods:

• Developed a highly homozygous diploid potato line ('Jan') through seven generations of self-pollination.
• Generated a chromosome-scale genome assembly for 'Jan' and identified syntelogs.
• Utilized CRISPR/Cas9 gene editing to create dwarf and compact 'mini-Jan' lines targeting growth-related genes.

Main Results:

• 'Jan' exhibits high homozygosity, vigor, fertility, and excellent tuber traits, regeneration, and transformation efficiencies.
• The 'Jan' genome assembly provides a valuable resource for comparative genomics.
• 'Mini-Jan' lines display reduced stature while maintaining fertility, suitable for space-constrained research.

Conclusions:

• 'Jan' and 'mini-Jan' lines represent a significant advancement for potato functional genomics and gene editing.
• These model systems will accelerate research into potato genetics and crop improvement.
• The developed lines facilitate high-throughput functional studies in controlled environments.