Abstract: Quantitative trait is an important trait in sheep breeding,which is controlled by micro-effect polygenes and has low heritability.However,traditional breeding methods are difficult to improve sheep breeding efficiency.Improving the efficiency of animal breeding is very important for breeding selection and economic production benefits.With the continuous innovation and development of new breeding technologies,genomic selection (GS) has become a powerful tool in breeding technology,and it has been successfully used in species with greater individual economic value.It has the advantages of shortening generation interval,improving breeding accuracy,reducing production cost and improving economic benefits of livestock and poultry.In recent years,as a result of the continuous maturity of genome technology and the upgrading and optimization of various statistical models,and lower high-density SNP chip prices,report about genome selective breeding of empirical and simulation studies emerge in endlessly,and the genome choose technology has been gradually develop in sheep breeding,especially in important trait of sheep have been many reports.However,due to the large number of sheep breeds,large differences in local traits and slightly low individual economic value,although the new technology of genome breeding has been very mature,it is still not widely used in sheep breeding.In order to have a more comprehensive understanding of the research status of this technology in sheep breeding,and based on the important position of selection and matching,the author reviews the research progress on genomic selection in sheep breeding,mainly summarized the application and current situation of genomic selection in sheep important traits from phenotyping,genotyping and different models,discussed its advantages and challenges,and looked forward to the future development direction of genomic selection.

Key words: genomic selection; sheep breeding; genotyping; quantitative trait