Keeping hot peppers hot
I grow banana peppers which have been in the family for a very long time. We just reuse the seeds every year. They tend to vary a lot in heat. When I was younger my father always grew one patch of large sweet peppers, but we never planted them close together. I don't recall if he did anything select the hotter peppers for seeds.
In order to keep these peppers hot, is it as simple as using seeds from the hotter ones from year to year?
And could I do the opposite so that I can breed a sweet version of these? If so, would these have a greater tendency to "cool down" my hot ones than other sweet varieties would?