John Polk wrote:
Most hybrids are fertile. However, the spawned plant will most likely not be like the parent.
That's the big issue, but it is not huge problem for permaculture as it is for commercial vegetable growers. The monoculture farmers want row after row of uniform plants that respond to fertilizer the same way, that ripen at the same time, where the produce is identical in size/shape/color. In a personal or community food forest, who cares about those things?? For personal/local producers, it may be better to have things that can be harvested over a period of months instead of in a narrow window. The big commercial grower wants to pick it all, send it to market, and dismiss the migrant workers.
And if a person saves the best seed from a non-uniform population, over the years they can create a variety that is locally adapted and genetically stable.