Abstract: The leaf and fruit vitamin C contents of two Actinidia populations were studied and the correlation coefficients were measured.One population consists of 32 cultivars of A.chinensis and the other is an interspecific population of 22 individuals.There’s a significant positive correlation between the young and mature fruit vitamin C content among the A.chinensis cultivars,and significant positive correlation between the mature leaf and mature fruit vitamin C content among the interspecific hybrids.This provided a scientific basis for the feasibility and practicality of early selection in Actinidia breeding.In addition,the results of multiple comparisons among the fruit vitamin C contents of famous cultivars provide some hints for choosing parents in breeding for high fruit vitamin C content.