@Seedfork I would not rely on the information Google Bard provides, at least for this subject. There are statements that are made that are superficially correct but that are not common. What happens when a diploid plant is converted to tetraploid depends at least partially on the methods used. The differences between diploid characteristics and tetraploid characteristics derive partially from the effect of a larger amount of genetic material and partly from the larger number of possible combinations and interactions.
The intention when successfully converting a diploid to tetraploid is that all of the genetic material remains intact and is duplicated. Losses and gains of genetic material can occur in diploids or tetraploids. They can certainly occur when trying to produce a tetraploid from a diploid but are not desired normally. At times changes in characteristics are desired and they can be deliberately produced even without a change in ploidy.
