A breed registry, also known as a stud book, is an official list of animals within a specific breed whose parents are known. Animals are usually registered by their breeders when they are still young. The terms "stud book" and "register" are also used to refer to lists of animals "standing at stud", that is, those animals actively breeding, as opposed to every known specimen of that breed.
The goal for the mother studbook management that also should set up goals for the improvement of the breed is that as many horses as possible are entered into the studbook and graded.
In most modern studbooks horses that the studbook management via educated, approved and ackedited judges consider be of certain value for the future of the breed are by various stimuli to the breeders encouraged to be used for breeding.
If the system of studbook keeping, gradings and breed improvement is to work optimally the breeders must be encouraged to register and show their horses for inspection.
The concept of studbooks and modern breed improvement methods where at that point unknow to the Turkmen breeders but it is described how the Russian scientists encouraged the Turkmen breeders to feed their young horses better to improve growth by arranging breed shows where the breeders could win money.
A state stud was created in Ashgabad to efficiently work with the breed at the same time as Turkmen breeders bred horses that competed with the state stud horses in shows as well as being entered into the studbook.
The General Studbook for the Akhal-Teke breed was closed to horses that could not trace both parents to the foundation stock in 1935.