Optimization of Agrobacterium-mediated transformation of commercial heirloom tomato cultivars to develop novel traits via CRISPR/Cas9 genome editing.
Oxendine J, Ibarra-Reyes E, Ma J, Li C, Baron S
Crispr
The heirloom tomatoes you grow from saved seed or find at the farmers market have never had the benefit of modern crop improvement — this research lays the groundwork for giving them disease resistance or better yields while keeping the flavors that make them worth growing.
Heirloom tomatoes taste amazing but are often fragile and hard to improve because the standard lab techniques for editing tomato genes only work well on a few bland, lab-friendly varieties. Researchers figured out how to make those editing tools work on six popular heirloom types by tweaking the growing conditions and using a special helper protein that nudges the plants to regenerate properly. They successfully created plants with changes to traits like how the plant grows and when it flowers — proof that the method works.
Key Findings
Six commercially relevant heirloom tomato cultivars were successfully tested for transformation and regeneration capacity, expanding beyond the four lab-standard varieties (M82, Ailsa Craig, Microtom, Sweet-100) that dominate existing protocols.
Use of the GRF4-GIF1 chimeric developmental regulator significantly improved recovery of transgenic plants by enhancing regeneration efficiency.
CRISPR/Cas9 genome editing was validated in multiple heirloom cultivars, successfully producing edited plants with targeted changes to plant architecture and flowering time genes.
chevron_right Technical Summary
Scientists developed a method to genetically edit heirloom tomato varieties — the flavorful, non-commercial types prized by gardeners and farmers markets — using CRISPR, opening the door to improving these beloved varieties without losing what makes them special.
Abstract Preview
Trait development for commercial heirloom tomatoes can be advanced by optimization of tissue culture and transformation via Agrobacterium and CRISPR/Cas9 mutagenesis. Genetic improvement using new ...
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