It’s fairly obvious that the hybrid breeding of diploid potatoes is no simple process, but it’s actually fairly simple to explain. Potatoes usually have four different copies of their chromosomes, meaning that it’s very difficult to determine which of the qualities get reproduced during the breeding process. The number of possibilities is simply too large.
The solution to this problem seems to essentially be in the existing diploid potatoes, that is, potatoes with two sets of chromosomes. Homozygous diploid potatoes are produced through inbreeding. This tends to mean that the genetic characteristics are only present in one variant. The homozygous diploid potato is then crossbred, giving the offspring the qualities of its parents. In many cases, this potato is better and stronger than its individual parents.