Apparently there is an International Potato Center...and they've spent the last year testing whether potatoes can grow on Mars.
""We have been looking at the very dry soils found in the southern Peruvian desert. These are the most Mars-like soils found on Earth." Chris McKay of NASA ARC. "This [research] could have a direct technological benefit on Earth and a direct biological benefit on Earth," says Chris McKay of NASA ARC." - Phys.org