Harnessing wild relative diversity for engineering tomato resilience

Scientists have built a massive genetic map of the tomato family. They call this a super pangenome. A traditional genome maps out the DNA of a single organism. A pangenome stitches together the genetic codes of many different varieties and wild plant relatives to create a master reference guide. In this case, researchers combined dozens of complete tomato genetic maps to explore the full diversity of the plant.

By digging into this extensive genetic library, the research team found specific sections of DNA that help tomatoes survive in salty soils. They also discovered a specialized immune receptor. This biological switch gives the plants natural resistance to dangerous fungal infections. Along the way, the scientists learned more about the evolution of the centromere, which is the tightly packed center of a chromosome that helps cells divide properly.

While these genetic discoveries are incredibly promising, the research is still in its early stages. The scientists have identified these structural changes and molecular markers in the lab. However, they have not yet grown these engineered tomatoes in large commercial fields to test how well the new traits hold up in the real world.