If you can find some one that has access to the USDA Grin Data base or if you can, they have a lot of varieties and descriptions and some photos. Also I believe a member here as grown a brown variety and if I remember right there is a white variety that is floating around.
I've tried to grow them several times and really like them, but Missouri is not compatible for them to produce anything but a small handful of pods in late September and we get our killing frost in the middle to late October. So I end up trying to over winter them, but since I moved I no longer have room to over winter any but my few wild peppers, speaking of which C. cardenasii and C. eximium are the only relatives of the rocoto/manzano that will cross with it. Both eximium and cardenasii will cross with a C. baccatum.
I don't know if anyone has tried back crossing and then trying to out cross using C. baccatum to add variation then back crossing again to make a new variety.
As much as I would like to try to breed a new pepper variety by doing all this myself at my age it would be too long a process to devote that much time and space, but a younger person might just be able to work it all out.
I've tried to grow them several times and really like them, but Missouri is not compatible for them to produce anything but a small handful of pods in late September and we get our killing frost in the middle to late October. So I end up trying to over winter them, but since I moved I no longer have room to over winter any but my few wild peppers, speaking of which C. cardenasii and C. eximium are the only relatives of the rocoto/manzano that will cross with it. Both eximium and cardenasii will cross with a C. baccatum.
I don't know if anyone has tried back crossing and then trying to out cross using C. baccatum to add variation then back crossing again to make a new variety.
As much as I would like to try to breed a new pepper variety by doing all this myself at my age it would be too long a process to devote that much time and space, but a younger person might just be able to work it all out.