The honkeys who have been filling gardening books full of vertically grown potatoes sure haven't been talking about particular types. When the internet became common, they put the same stuff on-line, yet nobody has ever seen a vertically grown bunch of potatoes. I am waiting as if the world.
It is simple, put a potato in as box and take pictures as it is harvested on a bright sunny day. Is that too much to ask? Like this.
http://www.durgan.org/URL/?QHBIN 21 August 2009 How a Potato Plant Grows
When I first became interested in growing quality potatoes, I couldn't even find anywhere how they grew. Why the hilling , etc?
TPS is to produce a new strain, which is a tedious process. Most TPS potatoes are crap. At least growing from seed tubers, (Clones) one can predict what will be produced.