Potato from potato seeds
I had bookmarked instructions from a lady on the Canadian East Coast (Prince Edward Island/PEI...potato country!) years ago, but unfortunately the site is no longer active & I never got her personal contact information, which I now regret. Anyway, she started her seed indoors in Feb (I think) to get the best start & transplanted it in spring.
You will not get the same variety of potato, but something different, especially if you have another variety around. But, you might get something better & more suited to your soil & climate of that year. You should get something more hardy. If you pick well for the potatoes that are most resistant to bugs and disease, over timeyou could create a wonderful local variety that could prove to be quite popular.
Planting potato seed will save you from introducing any new disease into your garden.
I think that it can take 2-3 years to get anything worth harvesting from them and can require digging it up for storage.
This lady used a dedicated blender (not food use) to extract the seeds from the ball of seeds (what is that thing called?) that looks like a tomato & is at the top of a plant. She would put water in with it & blend. She would extract the seeds. I think she would then put them into the fridge, in a moistened paper towel in a bag (watch for mold) to stratify them. In February, she would pull them out & plant them (most likely under lights). In spring, she would transplant into the garden. In fall, she dug the tiny potatoes up, cured them & carefully stored them. She planted them again the following spring.
This is all that I remember. Has anyone here done this successfully?