A chickens DNA will determine the breed of chicken and plays an important part in poultry farming. Breeding hens and broiler breeders (the day old chickes are used in a broiler chicken house) come from poultry stock strains that have been bred for specific purposes, like growth rates and their ability to fight disease. The stock is called grand parent stock and the most popular chicken breeds are overseas – and sold as parent stock around the world – and to buy parent stock is not cheap. Ross and Cob are just 2 examples of chicken breeds found in South Africa.
The DNA of a chicken, and the poultry breeds are highly protected by the owners of those breeds. The original wild chicken does not exist anymore – it has been cross bred and so many times that it is extinct. You may think that African chickens that you see in the remote areas are real African chickens but their DNA has been mixed countless times. To test DNA of these chickens one would need to take a sample and send it for DNA testing.