**Methodology**

This studies was carried out through a retrospective study of all undergraduate and Postgraduate researches conducted on chickens at some selected Departments of Animal science of Western and Eastern Nigeria (University of Nigeria Nsukka and Federal University of Agriculture Abeokuta, Ibadan) and some works carried out on the "Shika breed" at the National Animal production Research Institute (NAPRI), Zaria. Researchers visited the Libraries of both universities for collection of all available research (project) works with chicken and genetic improvement as their main interest. The Proceedings of National Society for Animal production (NSAP) were used to source genetic studies conducted at NAPRI. The study further compared the various genetic methods adopted by these researchers for improvement with breeding companies. The genetic parameters considered include Heritability, Correlation, Variance, Cross-breeding, Inbreeding, Selection methods, Uniformity of research environment, and emphasis of breeding goals. Finally, the study attempts to recommend a cheaper and pragmatic plan to create a layer pureline.
