A 6×6 diallel cross was carried out in six varieties, which were S-I, H-1, I-3, M-6, and P-13. The results indicated that all quantitative characters investigated in this experiment are controlled by additive and dominance allele, and mainly by additive allele. Maturity and yield are dominant by multiple dominance genes. The dominance allele are more than recessive in characters of node number at first flowering, days to flowering, single fruit weight and fruit number of plant, exclude the yield. Therefore, we can expect only that there is a good selection effect at the late generation of hybrid population.