Classification based on body types and conformation, absent the availability of DNA for research, once suggested that there were roughly four basic wild prototypes, thought to have developed with adaptations to their environment prior to domestication. There were competing theories: some argued that the four prototypes were separate species or subspecies, while others suggested that the prototypes were physically different manifestations of the same species. However, more recent study indicates that there was only one wild species and all different body types were entirely a result of selective breeding or landrace adaptation after domestication. Either way, the most common theories of prototypes from which all modern breeds are thought to have developed suggests that in addition to the so-called Tarpan subtype, there were the following base prototypes: