Constructing genetic linkage map is an essential tool to acknowledge genome in aquaculture species. This paper has reviewed the current status of genetic linkage map research, including mapping population, mapping method and molecular markers used to construct linkage map. Linkage map has great potential in marker assisted selection (MAS), gene locating and cloning, and comparative genome mapping. Genetic linkage map with high density and wide coverage of genome will allow cloning the genes which contribute to economically important traits. The ultimate aim of the constructing linkage map is the development of fast-growing, disease-resistant strains of the major aquaculture species.
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