Eighteen watermelon varieties from both China and abroad were chosen as objects for genetic studies in 12 quantitative characters related to yield. The results were shown in the following. (l)There are varying degree of genetic correlation between the characters of which heritability of cross section diameter, longitudinal section diameter and weight per melon are lower. (2) Path analysis indicetes that the characters in order of importance to yield are:longitudinal section diameter>index of fruit shape>cross section diameter>weight per melon >thickness of meat>leaf length>fruit growth period>...
