Abstract: Based on specimen correlation matrix, the main economic character of 9 varieties of apricot for using nucleolus were determined by pincipal component analysis,which included fruit yield per tree,weight per fruit,flesh rate,stone rate,kernel rate,dry stone weight,dry kernel weignt,kernel yield per tree,and amount of stone to produce one kilogram kernel.According to more than 85% of the cumulative variance proportion,the results proposed two principal components and its function equations which reflected the main economic characters of apricot for using nucleolus.The key principal component values of various varietics were calculated,it will be applied to selecting fine varieties,the results were similar to practical phenotype.The method of principal component analysis was more scientific and simple than the method of qiving a mark of main economic characters while evaluating main economic characters of apricot using for nucleolus copmprehensively.It will provide a theoretical basis for selecting fine varieties of apricot using for nucleolus.

Key words: Apricot for nucleolus using, Principal component analysis, Superior variety selection