Abstract: Five varieties of Diospyros kaki，one variety of Diospyros virginiana were used as female plants，and four varieties of Diospyros kaki were used as male plants to study the fecundity of the hybrid. Pollen viability was observed by culture in vitro method. Cross compatibility among different crossing combinations was determined using fluorescence microscope. Fruit setting rate and compatibility index resulted from different combinations of crossing were calculated. The pollen viability of four male plants from the highest to the lowest was‘Za 3-2’，‘Zenjimaru’，‘Za 4-2’，‘Shougatsu’. Among the 24 crossing combinations under study，‘Xinchang Niuxinshi’בZa 3-2’had the highest compatibility index（1.30） and fruit setting rate（73.88%），while the lowest compatibility index（0.03）and fruit setting rate（17.22%） were observed in Meizhoushi × Shougastu. The phenomenon of parthenocarpy and sti-parthenocarpy was observed in Mopanshi and Xinchang Niuxinshi. The phenomenon of parthenocarpy was observed in Huaxian Dahongshi. The phenomenon of non-parthenocarpic was observed in Meizhoushi，Maokuishi and Wakasugikeijirou. The cross compatibility of interspecific persimmon fruits was lower than that of intraspecific persimmon fruits；The cross compatibility and fruit setting rate varied among different varieties，and the cross compatibility index had close correlation with fruit setting rate.

Key words: permission, hybrid；pollen viability, compatibility, fruit setting rate