|"I learned how all mortal ponies—as both you and I know them—originated from this very same race, only to evolve into different subsets after the alicorn arrival splintered their genealogy through equine magic."|
|- Utaan, "East, Unto Twilight, and Beyond"|
The Equine Seeding refers to the process which created all modern forms of equine life. Mortuana explains that all mortal equines are descended from ancient pegasi, split into subspecies deliberately with alicorn magic.