The term refers to corn (maize) kernels specifically selected and preserved for the purpose of planting in order to grow subsequent crops. These kernels are not intended for consumption or processing into other products; their sole function is to propagate future generations of the plant. An example of this would be a farmer who carefully chooses the best ears of corn from their harvest, dries them, and stores the kernels separately from the rest of their yield, knowing they will be used for the next planting season.
The importance of carefully chosen kernels lies in optimizing crop yield, disease resistance, and overall plant health. Historically, the practice of saving the highest quality kernels has been fundamental to agricultural progress, allowing for the gradual improvement of corn varieties over time through selection and breeding. This process ensures that desirable traits are passed on to the next generation, leading to more productive and resilient crops.