Oat is an important crop with many health benefits and diverse applications. Researchers from the Technical University of Munich (TUM), Helmholtz Munich, and the Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK) have decoded the pan-genome of 33 oat lines—mapping their full genetic diversity. This comprehensive overview provides leverage for breeding more resilient, higher-yielding plants, as oats, too, face mounting pressures from a changing climate.