Abstract:

A comparison of the quality and yield between 496 varieties of plants which produce four different types of peach--normal peach,flat peach,nectarine and flat-nectarine peach, was performed to evaluate the differences in the agricultural characteristics between each type of peach. The results were as follows:(1) Comparing peach and flat peach, nectarine and flat-nectarine, the results showed that saucer shapes had higher SSC, higher soluble sugar contents, but lower titratable acid contents, lower firmness without skin, lower average fruit mass and lower yield index. (2)Comparing peach and nectarine, flat peach and flat-nectarine, glabrous cultivars had higher SSC, higher titratable acid contents, higher red flush degree, higher firmness, but lower soluble sugar contents, lower fruit average weight and yield index. (3)Saucer characteristics influenced stronger on fruit mass and sugar content, but glabrous characteristics on titratable acid contents and flush degree. (4)Comparing peach and flat-nectarine, flat-nectarine SSC and soluble sugar contents were higher and lower titratable acid contents, fruit average weight .

Key words: peach, fruit type, quality, yield